Ribbed Shoulder Bolt

Model / MPN: 31508 | NSN: 5306-00-579-5406

An externally threaded fastener whose threaded portion is of one diameter. It has a series of longitudinal ribs, splines or serrations on all or a part of the shoulder. The minor diameter of the ribs must be greater than the major diameter of the threads. See also bolt, ribbed neck.

Product Details

NATO Stock Number

5306-00-579-5406

Sold in multiples of

1 EA

DEMIL

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.844 inches and 0.906 inches

Fastener Length

Between 1.719 inches and 1.871 inches

Head Style

Pan no. 2

Head Diameter

0.750 inches

Head Height

Between 0.229 inches and 0.239 inches

Shoulder Diameter

0.526 inches first shoulder and 0.531 inches first shoulder

Shoulder Length

0.552 inches first shoulder and 0.562 inches first shoulder

Rib Major Diameter

Between 0.552 inches and 0.562 inches

Rib Length

Between 0.552 inches and 0.562 inches

Distance From Largest Diameter Of Bearing Surface Of Head To Ribs

0.062 inches

Thread Diameter

0.500 inches

Features Provided

Casehardened

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

110000 pounds per square inch

Hardness Rating

20.0 rockwell c and 24.0 rockwell c

Shoulder Shape

Ribbed first shoulder

Material

Steel comp 1020

Material Specification

Qq-s-634 federal specification single material response

Surface Treatment

Cadmium

Thread Series Designator

Unf

31508 Series Parts

Pricing and Availability

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31508 Cross Reference

8528125