5305-01-303-5621

Find complete technical information, availability, and procurement data for: 5305-01-303-5621
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-303-5621

Item Name Code

06660

Assigment Date

07/01/1989 (37 years ago)

A screw, (as modified) to which has been assembled one or more nonremovable washer(s).

0.845 inches minimum and 0.875 inches maximum fastener length, 0.734 inches minimum and 0.875 inches maximum thread length, 2a thread class, right-hand thread direction, hexagon 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: 2a
Thread Direction: right-hand
Thread Length: 0.734 inches minimum and 0.875 inches maximum
Fastener Length: 0.845 inches minimum and 0.875 inches maximum
Head Style: hexagon
Head Height: 0.208 inches minimum and 0.230 inches maximum
Width Between Flats: 0.489 inches minimum and 0.500 inches maximum
Washer Quantity: 1
Internal Drive Style: slot
Nominal Thread Diameter: 0.312 inches
Thread Quantity Per Inch: 18
Hardness Rating: 40.0 rockwell c minimum and 50.0 rockwell c maximum overall
Primary Washer Outside Diameter: 0.588 inches minimum and 0.610 inches maximum
Primary Washer Style: flat external teeth
Primary Washer Material Thickness: 0.028 inches minimum and 0.034 inches maximum
Material: steel overall
Material Document And Classification: sae j489 gr 2 assn std single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: ams 2400 assn std single treatment response overall
Thread Series Designator: unc
Nondefinitive Spec/Std Data: a type and 2 grade

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
13218E0504-79	Assembled Washer Screw

FAQs

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

What is the FSCG of the NSN 5305-01-303-5621?

The FSCG of the NSN 5305-01-303-5621 is 5305

Does the NSN 5305-01-303-5621 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-303-5621 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 5305-01-303-5621 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-303-5621 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 5305-01-303-5621 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Sat, Jul 1, 1989