5305-00-639-2738

Find complete technical information, availability, and procurement data for: 5305-00-639-2738
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-639-2738

Item Name Code

18257

Assigment Date

01/01/1963 (63 years ago)

2.250 inches minimum thread length, right-hand thread direction, hexagon head style, 6.875 inches nominal fastener length, 3a thread class

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: 2.250 inches minimum
Fastener Length: 6.875 inches nominal
Head Style: hexagon
Head Height: 0.406 inches nominal
Width Between Flats: 1.053 inches minimum and 1.066 inches maximum
Nominal Thread Diameter: 0.750 inches
Thread Quantity Per Inch: 16
Hardness Rating: 28.0 rockwell c minimum and 32.0 rockwell c maximum overall
Part Name Assigned By Controlling Agency: navy special project
Special Features: 0.062 in. lg by 45 deg chamfer on threaded end
Material: steel comp 4140 or steel comp 8630 overall
Surface Treatment: cadmium overall
Thread Series Designator: unf

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
797398PC1	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-639-2738?

The FSCG of the NSN 5305-00-639-2738 is 5305

Does the NSN 5305-00-639-2738 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-639-2738 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 5305-00-639-2738 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-639-2738 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 5305-00-639-2738 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963