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  • CARRIAGE BOLT, A307 GRADE A, PLAIN, LOW CARBON


    Carriage bolts (also descriptively called round head square neck bolts) generally feature a broad, shallow round head and threading along part of the carriage bolt shank, and is inserted into pre-drilled holes. The square under the head keeps the carriage bolt from turning as the nut is tightened.

    Carriage bolts are commonly used in wood and are used to fasten wood parts, or wood and metal parts, together. Carriage bolts are also successful with sheet metal applications, where a standard sized neck may create an obstruction.

  • FLAT COUNTERSUNK HEAD ELEVATOR BOLT, GRADE 1, PLAIN


    Elevator bolts are often used with canvas or other soft, pliable materials. The large diameter, flat countersunk head keeps them from pulling through the material. Also known as belt bolts, elevator bolts are also known for a shallow, conical bearing surface, an integrally-formed square neck under the head and a unified thread pitch.

    A common application for elevator bolts is industrial or agricultural belting systems or conveyor systems, where head clearances must be minimal and where a wide thin bearing surface is desired. Similar to the carriage bolt, the elevator bolt's square shoulder under head prevents turning when nut is applied.

  • HEAVY HEX BOLT, A307 GRADE B, PLAIN


    Hex bolts are bolts with a hexagonal head on one end, with no washer face on the bearing surface and a threaded shaft on the other end. Hex bolts are tightened with a wrench and are used to connect metal parts. (The body tolerances of hex bolts are not as close as those of hex cap screws.)

    The head of a heavy hex bolt is wider and thicker than that of a hex bolt. A heavy hex bolt goes with a heavy hex nut.

  • HEX BOLT, A307 GRADE A, PLAIN, LOW CARBON


    Hex bolts are bolts with a hexagonal head on one end, with no washer face on the bearing surface and a threaded shaft on the other end. Hex bolts are tightened with a wrench and are used to connect metal parts. (The body tolerances of hex bolts are not as close as those of hex cap screws.)

  • HEX LAG SCREW, PLAIN, LOW CARBON

    Lag Screws

    (348)


    Lag screws (sometimes called lag bolts) are usually threaded up to ¾ of the way from point to head. The remainder of the lag screw's shaft is round and smooth.

    Lag screws are used in wood. The most common head style is hex, followed by square. The hex style of the lag screw is more easily wrenched.

  • METRIC 10.9 HEX HEAD BOLT, DIN 931/DIN 960, PLAIN


    Hex bolts are bolts with a hexagonal head on one end, with no washer face on the bearing surface and a threaded shaft on the other end. Hex bolts are tightened with a wrench and are used to connect metal parts. (The body tolerances of hex bolts are not as close as those of hex cap screws.)

  • NO.3 HEAD PLOW BOLT, GRADE 5, PLAIN

    Plow Bolts

    (80)


    Plow bolts have countersunk flat heads, square necks, and a unified thread pitch. Because plow bolts wear along with the metal surface in which they are driven, they are suited for applications where a smooth surface is needed (at the spot of the head protrusion) and in which wear is expected.

    The dome head plow bolt is heavily used in the blades of farm and highway implements.

  • SQUARE BOLT

    Square Bolts

    (128)


    Square bolts (also known as square head bolts or square head machine bolts) offer less danger of wrench slippage in hand wrenching, as well as a greater bearing area. In addition, the square head style is more secure than a hex bolt style when fixed into a cored recess.

  • HEAVY HEX STRUCTURAL BOLT, A325 TYPE 1, PLAIN


    Used in heavy construction, structural bolts made to ASTM specifications are always used with a nut and often with a hardened washer. The bearing surface of structural bolts is flat and washer faced and the point is chamfered. High quality steel is used for strength and durability on structural bolts, and conforms to ASTM A325 or A490. (A490 is selected for greater yield and tensile strengths).

    Heavy hex structural bolts offer a six-sided head that is considerably thicker and offers more strength across the bearing surface than would a structural bolt with a head of standard thickness.

  • HEX TAP BOLT, A307 GRADE A, PLAIN, LOW CARBON

    Tap Bolts

    (450)


    Tap bolts are usually hex head bolts threaded up to the head, with a machined point and a fully threaded shank. Usually of low carbon or grade 5 steel, tap bolts are used in a drilled and tapped hole that is threaded over its full length. Tap bolts are also used instead of a stud and a nut, to be screwed into some fixed part, rather than passing through the part and receiving a nut.

    Tap bolts have tolerances similar to those of hex cap screws, and essentially serve as fully-threaded hex cap screws.

  • T.C. BOLT A325 ROUND HEAD PLAIN W/ A563 DH HVY HEX NUT & F436 WASHER


    A tension control bolt (TC bolt) is a heavy duty bolt used in steel frame construction. The head is usually domed and is not designed to be driven. The end of the shank has a spline on it which is engaged by a special power wrench which prevents the bolt from turning while the nut is tightened. When the appropriate torque is reached the spline shears off.

  • TIMBER BOLT, A307 GRADE A, HDG


    Timber bolts are explicitly meant for use with large wood planks and structures. They are common in lumber and marine industries.