HEX HEAD CAPSCREWS
A fastener for machine parts, threaded along the whole length of its shank and held by threads tappedin the holein which it is screwed. A screwed bolt with a cylindrical head having a hexagonal recess.
Usually a self-tapping screw, either round, flat, or pan-headed, threaded from tip to head, and used without a nut for fastening lapped sheet metal and some other materials. When equipped with a pointed tip, no tap hole is required.
Specific type of retaining ring that is named for its rounded "E" shape. E-Clip fasteners require a slotted shaft to hold items in place, such as bearings.
ACORN (CAP) NUTS
The acorn nut is a type of fastener which gets its name from its shape. Acorn nut is its common name and it is also called a crown hex nut, blind nut, cap nut or domed cap nut. It is a nut that has a domed top to cover the threads.
STANDARD SOCKET CAPSCREWS
Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance. Supplies greater tensile strength than equivalent sizes of Grade-5 or Grade-8 hex head capscrews while requiring less surface area or counterbore since the fastener is internally wrenched.
A coupling nut also known as extension nut is a threaded fastener for joining two male threads, most commonly a threaded rod, but also pipes. The outside of the fastener is usually a hex so a wrench can hold it.
L-Anchor bolts are used to fix embed plates, columns, sign structures, and many other structural objects to concrete. They are L-shaped for added anchoring power.
A taper pin is a fastener used in mechanical engineering. They are steel rods with one end having a slightly larger diameter than the other.
LOW HEAD SOCKET CAPSCREWS
Used in applications where the limited clearance would not accomodate the head height of a standard socket cap screw. Also used in counterbored holes of material too thin for a regular socket cap screw. However, because of their design, they cannot withstand the same preloads as a standard socket head.
COUNTERSUNK FINISHING WASHER
Countersunk washers serve the same function as a flat washer, but they provide a bearing surface for flat head screws. An additional application is providing a sealing function for flat head screws.
FLUSH SEATING PIPE PLUGS
A high pressure seal is achieved through the difference in taper, with dimensions precalculated to provide a higher sealing load near the large end of the plug and the threads near the top of the tapped hole. The flush type plug is preferred where high pressures are encountered and where protrusion is undesirable.
Designed to be inserted into a like-sized, hollow recess of a socket to manually tighten or loosen the fastener.
Wedge anchors, also known as expansion bolts and expansion anchors, secure themselves using a mechanical wedging effect at the end of the fastener. There are three basic styles of wedge anchors: fully threaded, partial threaded and the full-bodied wedge anchor.
HALF DOG POINT SOCKET SET SCREWS
Intended for permanent setting. The point should fit closely to the diameter of the drilled hole or against the flat. Often used instead of a dowel pin.
SPLIT ROLL PIN
A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the hole diameter, and a chamfer on either one or both ends to facilitate starting the pin into the hole.
KEP LOCK NUT
A K-nut can also refer to a Jet nut. Keps nuts. A Keps nut, (also called a K-nut or washer nut), is a nut with an attached, free-spinning washer. It is used to make assembly more convenient. Common washer types are star-type lock washers, conical, and flat washers.
A half-round metal strip bent into a pin whose ends can be flared after insertion through a slot or hole.
A washer with a bevel on one side, and used mostly in structural steel work to provide a flat surface for the nut wherever a threaded rod or bolt passes thorugh a beam at an angle.
NYLON INSERT LOCK NUT
A nyloc nut, also referred to as a nylon insert lock nut, polymer insert lock nut, or elastic stop nut, is a kind of locknut. It is a nut with a nylon collar insert that resists turning.
FLAT HEAD SOCKET CAPSCREWS
Used when a flush mounting, high strength screw is required. Commonly used in tools and dies where moving parts pass over the fastened area.
A T-nut, T nut, or tee nut (also known as a blind nut, which can however also refer to a rivet nut or an insert nut) is a type of nut used to fasten a wood, particle or composite materials workpiece, leaving a flush surface.
Elevator bolts are designed hold together canvas belts used in grain elevators and other conveyer systems. The large diameter of the head and square neck creates a greater bearing surface to keep the bolt from going through the soft conveyer material.
A threaded insert, also known as a threaded bushing, is a fastener element that is inserted into an object to add a threaded hole. They may be used to repair a stripped threaded hole, provide a durable threaded hole in a soft material, place a thread on a material too thin to accept it, mold or cast threads into a workpiece thereby eliminating a machining operation, or simplify changeover from unified to metric threads or vice versa.
BUTTON HEAD SOCKET CAPSCREWS
Used when a wider bearing surface or a smoother, more finished appearance is desired. Button head capscrews do not afford the strength of socket head capscrews and are designed for light fastening applications. They are not recommended for critical, high-strength applications.
A key whose cross section is part circular, to fit into a curved keyway in a shaft, and part rectangular, used chiefly in machinery.
A flange nut is a nut that has a wide flange at one end that acts as an integrated, non-spinning washer.
A turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. It normally consists of two threaded eye bolts, one screwed into each end of a small metal frame, one with a left-hand thread and the other with a right-hand thread.
Shaft collars have extremely diverse applications. Shaft collars have been used on applications from holding up a flag on a flag pole, to positioning devices on medical equipment to the more common industrial applications of holding other shaft components such as bearings, sprockets and pulleys in place. In general, shaft collar applications fall into one of three broad categories:
Postioners: Locate or position a component on a shaft
Spacers: Keep components "spaced" apart
Limiters: Limit the movement of a shaft such as in a reciprocating application
SOCKET SHOULDER SCREWS
For rotation or sliding applications, such as pulley shafts, in punch and die work, or less use as a bearing pin. Shoulder screws are also referred to as "stripper bolts".
A bolt that has a conical head with a flat top and a smaller square shank below the head to keep the bolt from turning as its nut is tightened.
Such bolts are used to hold parts of the plow together that have scouring surfaces. The bolt head fits into a conical hole size so that the top
of the head is flush with the scouring surface. If a bolt with a conventinal head were used, the head would prevent good scouring and would eventually wear away.
COBALT DRILL BITS
Cobalt drill bits are particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with 5 to 8 percent cobalt. The 5-percent alloy is known as M35 grade, and the 8-percent alloy is M42. The cobalt increases the strength of the steel and makes it more heat-resistant; this is an important factor in drilling hard materials because the friction of metal against metal can produce high temperatures that damage the material or the drill bit.
A stove bolt is a type of machine screw that has a round or flat head and is threaded to the head. They are usually made of low grade steel, have a slotted or phillips drive, and are used to join sheet metal parts using a hex or square nut.
INTERNAL TOOTH LOCK WASHER
An internal tooth lock washer has teeth that extend radially inward to bite into the bearing surface. The internal tooth lock washer is designed to prevent a nut or bolt head from loosening with the strut action set up by the teeth.
A carriage bolt, coach bolt or round head square neck bolt is a form of bolt used to fasten metal to wood.
SHAKER SCREEN BOLTS
Shaker Screen bolts are Self-anchoring bolts with a square neck that resists turning when nut is tightened or removed. This bolt is stronger than a carriage bolt, and is always fully threaded. Most commonly used for wood-to-wood and wood-to-metal applications.
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CONE POINT SOCKET SET SCREWS
For permanent setting on soft or hardened shafts. The deep penetration it offers gives this style set screw the highest torsional & axial holding power. For shafts of Rockwell hardness C15 or over, spot point half its depth. Can also be used as a pivot or hanger. When two set screws are used in a set screw collar, their holding power is determined by their location with respect to each other.
There are two basic types of drywall screw for installers to choose from. Type “W” units, or wood screws, have wide, coarse threads. They are used for wood framed buildings, where their coarse threading helps them to securely grip the wood. Type “S” screws are designed for use with steel framing members. They have a sharp, notched head that can easily penetrate the steel framing, as well as fine threads that are designed to pass through the steel.
Drywall screws are a type of self-tapping fastener, which means that there is no need to pre-drill holes. These screws almost always have a Phillips head rather than a slotted head, which provides additional control for installers. Instead of a standard drill, installers use a tool known as a drywall dimpler, which has an adjustable nose to install a drywall screw without tearing the paper on each sheet.
A standard drywall screw can be readily identified by its black finish. This black coloring comes from a phosphate mineral coating that is applied to these screws. This coating helps to minimize rusting and corrosion as the screws are exposed to wet joint compound or paint.
CUP POINT SOCKET SETSCREWS
The cup point is the most used style set screw. Designed for fast, permanent and semi-permanent location of parts on shafts with hardness differential of 10-15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable.
A U-bolt is a bolt in the shape of the letter U with screw threads on both ends. U-bolts have primarily been used to support pipework, pipes which fluids and gasses pass through. As such, U-bolts were measured using pipe work engineering speak.
HEAVY HEX NUTS
Heavy hex nuts are specified for use with bolts or studs having higher strength, zinc coatings or nominal thread size larger than 1-1/2".
REVERSIBLE LOCK NUTS
Two way lock nuts are low cost, one piece, all-metal prevailing torque hex lock nuts with chamfered (beveled) corners. The locking action is created by two or three equally spaced rectangular or round indentations centered in the flats (sides) of the nuts that slightly distort the threads. Two way lock nuts are considered "two way" because they can be installed either way, which reduces automated assembly costs (their tops and bottoms are the same like regular hex nuts).
EXTERNAL TOOTH LOCK WASHER
An external tooth lock washerhas teeth that extend radially outward to bite into the bearing surface. Like internal tooth lock washers, they are designed to prevent a nut or bolt head from loosening with the strut action of the teeth.
Are some of the toughest types of screws out there. Also called lag bolts, lag screws are generally used to connect heavy lumber and other materials that bear an intense load.
Machine keys and key stock are demountable machine elements that are used to transmit torque from a shaft to the component. The use of a machine key and key stock prevents movement between the shaft and the component and allows force to be released without causing stress or wear on the machine. Machine keys are usually made of steel or stainless steel and plated with zinc for wear and oxidation resistance.
A dowel threaded on both ends.
Dowel screws are lag threaded dowels (studs) used to fasten two pieces of wood. Like typical studs, they are headless, double-ended screws but have wood screw threads at both ends. Common uses include furniture making, attaching balusters to stairs and flooring, installing finials, creating end-to-end joints and other woodworking applications where wood needs to be joined using a single hidden fastener and blind holes. Dowel screws are also known as:
wood screw threaded studs.
SQUARE HEAD MACHINE BOLTS
Machine bolt - a bolt with a square or hexagonal head on one end and a threaded shaft on the other end; tightened with a wrench; used to connect metal parts.
SPLIT LOCK WASHER
1. Apply greater bolt tension per unit of applied torque. 2. Provide hardened bearing surfaces to create more uniform torque control. 3. Provide more uniform load distribution through controlled radii (section) cutoff. 4. Provide protection against looseness resulting from vibration and corrosion. 5. Optimum locking device for use in applications with hardened faying or bearing surfaces.
Hanger bolts have threaded areas at both ends: a lag screw thread at one end and machine screw thread on the other. They are designed for insertion into a pre-drilled holes and are ideal for overhead applications, such as suspending electrical wiring or sheet metal from wooden structures.
SELF TAPPING SCREWS
A self-tapping screw does what it says. The point on the screw has a set of blades, which are used for drilling a pilot hole. In industrial application the term "tapping" is used to mean drilling a pilot hole. This type of screw is used in applications for hard materials so that the material does not crack. In wood application usually a self-drilling screw is used. The exception is with hardwoods that are fragile and can crack.
The self-tapping screw drills the pilot hole before the threads of the screw at a diameter that will allow for the screw to be inserted without cracking the material. It is a common screw in masonry and steel work.
TYPE U DRIVE SCREWS
U-drive screws (also known as hammer drive screws) are unslotted round head self tapping screws often used for attaching nameplates in castings and for sealing drain holes in corrosion proofing tubular structures. They possess multiple start threads with large helical angles and an unthreaded pilot point. Similar to nails they are driven into mating parts with a mallet or hammer for a quick and permanent assembly. No tapped threads are required in the mating part. However, the u-drive screw must be of harder material than the mating part and a undersized pre-drilled pilot hole is required
KNURLED POINT SOCKET SET SCREWS
Knurled cup points offer the added advantage of a locking action (similar to that of a serrated lock washer) that prevents the screws from working loose in high-vibration applications (such as machinery that vibrates a lot while running).
Compared with threaded bolts, fully threaded studs have no head, are threaded along their entire length, and have a higher tensile strength. These studs are usually fastened with two nuts and used with objects that must be assembled and dissembled quickly.
PARTICLE BOARD SCREW
A chipboard screw or particleboard screw is a self tapping screw with a thin shaft and coarse threads. Chipboard is a made up of resin and wood dust or wood chips, so chipboard screws are made to grip this composite material and to resist withdrawing. The screws solidly fasten chipboard to chipboard or chipboard to other materials such as natural wood.
The use of a self-drilling screw is fundamentally different from self-tapping screws. With a self-drilling one the point of the screw is tapered to a fine point. It has threads that go from the base of the head of the screw, all the way down to the point. This allows it to thread into the material, creating a strong structural bond.
When using self-drilling screws, it may be necessary to drill a pilot hole that is smaller than the diameter of the screw. This will help it to thread itself into the material. This is a common type that is used in many different types of applications, including carpentry, and machinery.
Flange bolts have a circular flange under the head that acts like a washer to distribute the load. Flange bolts that are non-serrated are sometimes called frame bolts.
A nut having two flat, widely projecting pieces such that it can be readily tightened with the thumb and forefinger.
DRY SEAL PIPE PLUGS
The thread trunction is closely controlled at root and crest to assure metal contact, preventing spiral leakage and forming a positive seal without the use of sealing compounds. Dry seal plugs can be used in American Standard Taper Dryseal Pipe Thread (NPT) tapped holes, but for fullest protection against leakage, should be used in dryseal tapped holes which are taper reamed before tapping.
COUNTERSUNK EXT. TOOTH LOCK WASHER
A concave shaped locking washer with teeth or prongs which extend outward from the outside edge of the washer. This maintains essential tension and opposes any loosening influence on the fastener. The flexed teeth absorb shock, vibration and slipping.
HEX JAM NUTS
A jam nut is a low profile type of nut, typically half as tall as a standard nut. It is commonly used as a type of locknut, where it is "jammed" up against a standard nut to lock the two in place. It is also used in situations where a standard nut would not fit.
FLAT POINT SOCKET SET SCREWS
Designed for frequent resetting or relocating on hard steel shafts and where minimal damage to shafts is necessary. Ground flats on the shaft improves the contacts.
FINISHED HEX NUTS
A nut is a type of fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten a stack of parts together.
E-Z LOK INSERT
Used for thread repair.
TAPS & DIES
Taps and dies are tools used to create screw threads, which is called threading. Many are cutting tools; others are forming tools. A tap is used to cut or form the female portion of the mating pair (e.g., a nut). A die is used to cut or form the male portion of the mating pair (e.g., a bolt). The process of cutting or forming threads using a tap is called tapping, whereas the process using a die is called threading. Both tools can be used to clean up a thread, which is called chasing.
A metal bolt or pin having a head on one end, inserted through aligned holes in the pieces to be joined and then hammered on the plain end so as to form a second head.
A panel nut is very thin nut with a relatively large hole commonly used to mount threaded electrical switches. These are often used where light duty precision fasteners are needed. They have width close to the diameter of the fastener they secure. These usually have low thread count. They are of two types hexagonal panel nut and knurled round panel nut.
EXTERNAL/INTERNAL TOOTH LOCKWASHERS
Use where large bearing surface is desired. Use to span oversized or elongated holes. Use as insert between two adjustable pieces to maintain their position after original setting. Ideal for electrical bonding.
A retaining ring is a fastener that holds components or assemblies onto a shaft or in a housing/bore when installed in a groove. Once installed, the exposed portion acts as a shoulder which retains the specific component or assembly.
STANDARD FLAT WASHER
A flat thin ring or a perforated plate used in joints or assemblies to ensure tightness, prevent leakage, or relieve friction.
OVAL POINT SOCKET SET SCREWS
Preferred style for frequent reset on soft or hard shafts with minimum deforming. Also chosen for permanent setting on shafts spotted, splined or grooved, and for applicarions where point meets shaft on an angle. Sometime subtituted for the cup point style.
A regular hexagon nut with slots cut across the flats of the hexagon so that a cotter pin or safety wire can hold it in place.
A flat washer with a particularly large outer diameter in proportion to its central hole. They are commonly used to spread the load on thin sheet metal, and are named after their use on automobile fenders.
TORX FLOORBOARD SCREWS
Torx screws are used in applications where a flat surface is involved. The head uses an allen wrench type of socket, and can mostly be found for floorboard and furniture construction where items must be held together flush with one another. The beauty of this type of screw is that they can transmit much more torque per square inch than a more common Phillips head screw. This reduces screw stripping, and is perfect for applications where constant weight and stress is a factor, like with floors and furniture.
A grease fitting, grease nipple, Zerk fitting, or Alemite fitting is a metal fitting used in mechanical systems to feed lubricants, usually lubricating grease, into a bearing under moderate to high pressure using a grease gun.
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A screw designed for a wood or a similar material, with a point, a relatively coarse thread, a thick shank, and, usually, an unthreaded portion of the shank at the head end.
A nut with rounded extensions projecting past the nut's opening. A cotter pin is inserted through a hole in the bolt and bent around the castle nut's projections to lock the nut in place.
An eye bolt is a bolt with a loop at one end. They are used to firmly attach a securing eye to a structure, so that ropes or cables may then be tied to it.
A thumb screw is a type of screw or bolt which has an over-sized head with a knurled or diamond-patterned grip finish or large wing type blades that allow the screw to be tightened or loosened by hand. This type of fastener is used in applications in which a device may require frequent removal and re-installation, such as a safety cover or any number of electronic devices. This type of screw makes it possible to remove the fasteners by simply twisting them with a thumb and forefinger.
A screw designed for metal or a similar material, usually with no point and a relatively fine thread, intended for prepared, threaded holes.
SERRATED FLANGE NUTS
The flange may be serrated to provide a locking action. The serrations are angled such that they keep the nut from rotating in the direction that would loosen the nut. Because of the serrations they cannot be used with a washer or on surfaces that must not be scratched. The serrations help in preventing the vibration of the nut from moving the fastener, thus maintaining the holding power of nut.
SQUARE HEAD SETSCREWS
Square head set screws are similar to a cap screw but without a shoulder under the head. They feature a variety of point styles such as 1/2 dog, cone, cup, flat and oval. The large bearing area of the square head provides positive gripping for a hand wrench.
A gasket in the form of a ring with a circular cross section, typically made of pliable material, used to seal connections in pipes, tubes, etc.
CONCRETE SCREWS (TAPCONS)
A concrete screw is designed and manufactured so the threads of the screw will tap threads into concrete, brick or block. The threads are hardened without making the body of the screw so brittle that the screw would shear off. ITW/Buildex developed the first concrete screw in the late 1970s and in the early 1980s marketed their Tapcon® brand concrete screw. It revolutionized the installation...