5305-00-637-8279

Find complete technical information, availability, and procurement data for: 5305-00-637-8279
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-637-8279

Item Name Code

06657

Assigment Date

01/01/1963 (63 years ago)

round extended washer head style, 0.594 inches minimum and 0.656 inches maximum fastener length, 3a thread class, right-hand thread direction, 0.375 inches minimum and 0.438 inches maximum 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: 0.375 inches minimum and 0.438 inches maximum
Fastener Length: 0.594 inches minimum and 0.656 inches maximum
Head Style: round extended washer
Head Diameter: 0.302 inches minimum and 0.322 inches maximum
Head Height: 0.082 inches minimum and 0.092 inches maximum
Extended Washer Diameter: 0.365 inches minimum and 0.385 inches maximum
Extended Washer Thickness: 0.023 inches minimum and 0.028 inches maximum
Internal Drive Style: slot
Nominal Thread Diameter: 0.164 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 125000 pounds per square inch
Hardness Rating: 26.0 rockwell c minimum and 32.0 rockwell c maximum
Screw Material: steel comp 4037 or steel comp 8630
Screw Material Document And Classification: ams 6300,g40370 assn std 1st material response or mil-s-6050,g86300 mil spec 2nd material response
Screw Surface Treatment: cadmium and chromate or chromate zinc
Screw Surface Treatment Document And Classification: qq-p-416,type 2,class 3 fed spec 1st treatment response or astm b633,type 2,fe/zn 13 assn std 2nd treatment response
Thread Series Designator: unc
Specification/Standard Data: 88044-an525 government standard

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-285-5309	No Name Available	09/06/1968

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
AN525-832-10	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-637-8279?

The FSCG of the NSN 5305-00-637-8279 is 5305

Does the NSN 5305-00-637-8279 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-637-8279 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 5305-00-637-8279 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-637-8279 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 5305-00-637-8279 was assigned to the Federal Catalog?

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