5305-01-439-2123

Find complete technical information, availability, and procurement data for: 5305-01-439-2123
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-439-2123

Item Name Code

18257

Assigment Date

12/02/1996 (29 years ago)

A nut round in shape, whose outer surface or portion(s) is/are knurled. It may have provisions for external wrenching. An integral feature is incorporated for locking on the threads of a mating member.

hexagon head style, 6.750 inches nominal fastener length, 6.750 inches maximum thread length, 2a thread class, right-hand thread direction

Product Characteristics

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

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 6.750 inches maximum
Fastener Length: 6.750 inches nominal
Head Style: hexagon
Head Height: 0.226 inches minimum and 0.268 inches maximum
Width Between Flats: 0.544 inches minimum and 0.562 inches maximum
Nominal Thread Diameter: 0.375 inches
Thread Quantity Per Inch: 16
Material: steel overall
Material Document And Classification: astm a534, grade 8 assn std single material response overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: astm b633 assn std all treatment responses 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
B1821BH038C675N	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-439-2123?

The FSCG of the NSN 5305-01-439-2123 is 5305

Does the NSN 5305-01-439-2123 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-439-2123 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 5305-01-439-2123 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-439-2123 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 5305-01-439-2123 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Mon, Dec 2, 1996