5305-01-312-7073

Find complete technical information, availability, and procurement data for: 5305-01-312-7073
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-312-7073

Item Name Code

41756

Assigment Date

12/21/1989 (36 years ago)

A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.

0.624 inches minimum and 0.676 inches maximum extended washer diameter, hexagon extended washer head style, 0.489 inches minimum and 0.500 inches maximum width between flats, 0.243 inches minimum and 0.285 inches maximum head height, 0.750 inches nominal fastener length

Product Characteristics

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

Fastener Length: 0.750 inches nominal
Head Style: hexagon extended washer
Head Height: 0.243 inches minimum and 0.285 inches maximum
Width Between Flats: 0.489 inches minimum and 0.500 inches maximum
Extended Washer Diameter: 0.624 inches minimum and 0.676 inches maximum
Extended Washer Thickness: 0.035 inches minimum and 0.055 inches maximum
Internal Drive Style: w/o internal drive
Hardness Rating: 28.0 rockwell c minimum and 38.0 rockwell c maximum overall
Nonmachine Thread Style: blunt (sf) or blunt (type sw) or blunt (type tt)
Nonmachine Nominal Thread Diameter: 0.312 inches
Material: steel overall
Surface Treatment: phosphate zinc overall

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
84G3112H	Tapping Screw

FAQs

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

What is the FSCG of the NSN 5305-01-312-7073?

The FSCG of the NSN 5305-01-312-7073 is 5305

Does the NSN 5305-01-312-7073 have a Schedule B code assigned?

Yes, the Schedule B code is 7318140000

Does NSN 5305-01-312-7073 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 5305-01-312-7073 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-312-7073 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 5305-01-312-7073 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Thu, Dec 21, 1989