5305-01-379-4181

Find complete technical information, availability, and procurement data for: 5305-01-379-4181
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-379-4181

Item Name Code

06672

Assigment Date

08/31/1993 (32 years ago)

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes:nut (1), self-locking, cap.

0.311 inches minimum and 0.322 inches maximum fastener length, right-hand thread direction, 3a thread class, 0.312 inches nominal thread length, headless (setscrew) head style

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.312 inches nominal
Fastener Length: 0.311 inches minimum and 0.322 inches maximum
Head Style: headless (setscrew)
Point Style: cup
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.125 inches nominal
Thread Quantity Per Inch: 20
Hardness Rating: 45.0 rockwell c minimum and 53.0 rockwell c maximum overall
Color: bronze or olive drab overall
Material: steel comp 4032 or steel comp 4037 or steel comp 4137 or steel comp 4140 or steel comp 8630 or steel comp 8740 overall
Material Document And Classification: aisi assn std all material responses overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 ty2 cl3 fed spec single treatment response overall
Thread Series Designator: unc

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
12387304-64	Setscrew

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-01-379-4181?

The FSCG of the NSN 5305-01-379-4181 is 5305

Does the NSN 5305-01-379-4181 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-379-4181 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5305-01-379-4181 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-379-4181 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5305-01-379-4181 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Tue, Aug 31, 1993