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Fastener Reference Guides

Bolt Torque Charts

There are many variables in the torque-tension relationship. Therefore, these suggested torque calculations are estimates and offered as a guide only.
Thread Pitch Chart

Thread pitch is the distance between threads expressed in millimeters. Here you will find pitch/diameter combinations for UNC, UNF and 8UN Thread Series.
Screw Point Types

An illustrated guide to Sheet Metal Tapping Screws (Type A, AB & B), Thread Cutting Screws (Type 1, 17, 23, 25 & F), and Thread Forming Screws (Type C, CA, PT Trilobular & Hi-Lo).
Fastener Thread Terminology

A handy reference guide defining various fastener thread terms and classes of thread.
Drive & Head Styles

A guide to help distinguish between different types of drive styles and head styles.
Hex Cap Screws: Technical Information

Provides head & thread dimensions, performance and mechanical specs.
Socket Cap Screws: Technical Information

Provides head & length dimensions as well as torque values, performance and mechanical specs.
Socket Set Screws: Technical Information

Provides head & length dimensions as well as torque tightening values and mechanical specs.
Wood Screws: Technical Information

Provides head, length and body dimensions as well as performance and mechanical specs for wood screws.
Socket Shoulder Screws: Technical Information

Provides head, body & length dimensions as well as torque tightening values and mechanical specs.
Tension Control Bolts: Technical Information

Provides head, length and body dimensions as well as performance and mechanical specs.
Lag Screws: Technical Information

Provides head, length and body dimensions as well as performance and mechanical specs.
Structural Bolts: Technical Information

Provides head, length and body dimensions as well as performance and mechanical specs.
Heavy Hex Bolts: Technical Information

Provides head, length and body dimensions as well as performance and mechanical specs.
Fully Threaded Hex Tap Bolts: Technical Information

Provides head, length and body dimensions as well as performance and mechanical specs.
Elevator Bolts: Technical Information

Provides body diameter, head diameter, head height, yield strength and other useful elevator bolt technical information.
Carriage Bolts: Technical Information

Provides technical information for round head square neck, round head short neck, ribbed neck, rin neck, and other styles of carriage bolts.
Finished Hex Nuts: Technical Information

Provides finished hex nut dimensions and technical information for Grade-2, Grade-5, Grade-8, HDG, & Stainless Steel.
Heavy Hex Nuts: Technical Information

Provides heavy hex nut dimensions and technical information for Grade-A, Grade-C, A194 Grade-2H, A 563 Grade-DH, A 563 Grade-DH3 & stainless steel nuts.
Hex Panel Nuts: Technical Information

Provides dimensions and technical information for hex panel nuts, including the proper wrench size and thickness.
Two-Way Reversible Lock Nut: Technical Information

Provides dimensions & technical information for two-way reversible lock nuts.
Hex Jam Nuts: Technical Information

Provides dimensions and technical information for hex jam nuts and heavy hex jam nuts.
Hanger Bolts: Technical Information

Provides diameter & thread pitch, length dimensions (standard & machine screw length), core hardness and tensile strength for hanger bolts.
K-Lock Nuts: Technical Information

Provides dimensions and technical information for Keps K-Lock Nuts.