5305-00-639-4338

Find complete technical information, availability, and procurement data for: 5305-00-639-4338
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-639-4338

Item Name Code

06672

Assigment Date

01/01/1963 (63 years ago)

cup point style, 3a thread class, right-hand thread direction, 0.250 inches nominal fastener length, 0.250 inches minimum thread length

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: 0.250 inches minimum
Fastener Length: 0.250 inches nominal
Point Style: cup
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.112 inches
Width Across Flats: 0.050 inches minimum and 0.051 inches maximum
Thread Quantity Per Inch: 40
Hardness Rating: 45.0 rockwell c minimum and 53.0 rockwell c maximum overall
Material: steel comp 4037 or steel comp 4137 or steel comp 8630 or steel comp 8740 overall
Material Document And Classification: sae assn std all material responses overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 fed spec all treatment responses overall
Thread Series Designator: unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-285-3171	No Name Available	07/01/1966
5305-00-638-5653	No Name Available	01/01/1963

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
4179100-31	Setscrew
7203630P003	Setscrew
AN565D4H4	Setscrew
N70P00904C11	Setscrew

FAQs

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

What is the FSCG of the NSN 5305-00-639-4338?

The FSCG of the NSN 5305-00-639-4338 is 5305

Does the NSN 5305-00-639-4338 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-639-4338 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 5305-00-639-4338 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-639-4338 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 5305-00-639-4338 was assigned to the Federal Catalog?

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