FASTENER GUIDE

Standard Carriage Bolts (Square Neck)
Standard carriage bolts come in square neck style, with some parts available in a short neck option. Featuring a round head with a square neck under the head, along with machine screw threads, the square neck is designed to keep the bolt from turning as a nut is tightened. The short neck variety is used in sheet metal where a standard sized neck would create an obstruction.

Standard Carriage Bolt Material / Finish Options:
Steel / Zinc
Steel / Hot Dip Galvanized
Steel / Black Oxide
Grade 5 / Zinc
Grade 8 / Zinc Yellow
18-8 Stainless Steel
(Short neck in steel / zinc only)

A two sided fastener with wood screw type threads and points at both ends. Inserted into a pre-drilled hole, they are commonly used for fastening two pieces of wood together in a permanent position, relative to one another. Frequently used in the furniture industry.

Dowel Screws are offered in Steel / Zinc.

Bolt with a wide, countersunk flat head, a shallow conical bearing surface, an integrally-formed square neck under the head, and a unified thread pitch. Similar to carriage bolts, except that the top of the head is flat, rather than the bottom of the head. Provides a low profile fastening solution. Popular use is in conveyor systems, such as elevators.

Elevator Bolts are offered in Steel / Zinc.

Hanger bolts are available in full thread and plain center options. They are threaded at both ends, with one side having wood screw type threads, and the other having machine screw threads. Designed for the wood screw side to be inserted into a pre-drilled pilot hole, the machine threads becomes a post with which to attach materials. Used for suspending electrical wiring and sheet metal, as well as commonly used in the furniture industry.

Hanger Bolt Material / Finish Options:
Steel / Zinc
18-8 Stainless Steel

Commonly used in the automotive industry, flange / frame bolts consist of a one-piece indented hex washer head bolt with a flat, flanged bearing surface. The flange eliminates washers and can help compensate for misaligned holes.

Unlike hex cap screws, hex machine bolts don't feature a washer face on the bearing surface (bottom of the head). The galvanized finish provides better corrosion resistance than a standard zinc coating, and requires matching nuts to have tapped oversize holes.

Hex Machine Bolts are offered in Steel with a Hot Dip Galvanized finish.

Always fully threaded, hex tap bolts are used in threaded holes or combined with a hex nut to create a strong fastening system. To be used in drilled and tapped holes which are threaded full length. Used instead of a stud and a nut.

Hex Tap Bolt Material / Finish Options:
Steel / Zinc
Grade 5 / Zinc
Grade 8 / Plain
Grade 8 / Zinc Yellow
18-8 Stainless Steel

Also called lag screws, or hex lag screws, lag bolts, feature a hex head, spaced threads and a gimlet point. Lag screws are generally used in pre-drilled holes in wood, or with lag screw shields in a variety of materials. Also available in high-profile, hex-flange, and acoustical eye styles.

Lag Bolt Material / Finish Options:
Steel / Plain
Steel / Zinc
Steel / Hot Dip Galvanized
Steel / Black Oxide
18-8 Stainless Steel

Featuring a countersunk, flat head; a square neck; and machine / cap screw threading, plow bolts are used in heavy duty equipment that requires a smooth head surface.

Plow Bolt Material / Finish Options:
Grade 5 / Plain
Grade 5 / Zinc
Grade 10 / Plain

Slotted flat head cap screws are commonly used in close tolerance machinery. The countersunk head allows for superior head clearance.

Slotted Flat Head Cap Screws are offered in Steel / Zinc.

Combined with square nuts or hex nuts, square head machine bolts offer greater bearing surface for wrenching. Our selection includes Battery Bolts.

Square Head Machine Bolts are offered in Steel with a plain finish.

Featuring a wide, low-profile, slightly rounded head and a square neck, step bolts are used when a large bearing surface needs to be combined with a low profile head. Similar to a carriage bolt in bearing surface and square-neck design, but with a wider, lowerprofile, round head. Preferred for use where wood is bolted down as decking--the larger diameter head of the step bolt will not pull through the softwood.

Step Bolts are offered in Steel / Zinc.

Often used on structural steel joints in heavy construction, structural bolts are also heat treated. The bearing surface is flat and washer faced. Commonly used in structural steel joints in heavy construction.

Structural Bolt Material / Finish Options:
A325 (Medium Carbon Steel / Plain)
A325 (Medium Carbon Steel / Hot Dip Galvanized)

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