Stepped Stud

Model / MPN: S346-3-78A | NSN: 5307-00-490-4765

A headless fastener not exceeding 12 inches (304.8 mm) in length, threaded externally on both ends on which the diameter of one threaded section is greater than the other. The entire unthreaded portion must be of a single diameter equal to or smaller than the major diameter of the larger threaded end. Includes radial grooves or thread reliefs. Excludes items with tapered threads.

Product Details

NATO Stock Number

5307-00-490-4765

Sold in multiples of

DEMIL

Thread Class

3a nut thread

Thread Class

3a stud thread

Thread Direction

Right-hand nut thread

Thread Direction

Right-hand stud thread

Thread Length

0.490 inches nut thread and 0.510 inches nut thread

Thread Length

0.377 inches stud thread and 0.407 inches stud thread

Shank Diameter

0.250 inches

Overall Length

Between 0.927 inches and 0.940 inches

Thready Qty Per Inch (tpi)

24 stud thread

Hardness Rating

Between 26.0 rockwell c and 32.0 rockwell c

Thread Size

0.375 inches stud thread

Material

Steel comp 4130

Material Specification

Mil-s-6758 military specification single material response

Surface Treatment

Cadmium

Surface Treatment Specification

Ams 2400 assn standard single treatment response

Style Designator

Stepped

Thread Series Designator

Unf stud thread

S346 Series Parts

Pricing and Availability

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S346-3-78A Cross Reference

882C-4MB0500