1640902

View detailed technical data, stock status, and sourcing information for: 1640902
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-160-3945

Item Name Code

41756

Assigment Date

08/21/1983 (42 years ago)

A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes:screw, assembled washer.

20.70 millimeters minimum and 22.00 millimeters maximum fastener length, cross recess type ia internal drive style, casehardened features provided, oval countersunk head style, 5.81 millimeters minimum and 6.30 millimeters maximum head diameter

Product Characteristics

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

Fastener Length: 20.70 millimeters minimum and 22.00 millimeters maximum
Head Style: oval countersunk
Head Diameter: 5.81 millimeters minimum and 6.30 millimeters maximum
Internal Drive Style: cross recess type ia
Features Provided: casehardened
Nonmachine Thread Style: dog type (type b or c)
Countersink Angle: 90.0 degrees minimum and 92.0 degrees maximum
Nonmachine Nominal Thread Diameter: 3.5 millimeters
Material: steel overall
Material Document And Classification: gm 6010-m fscm 11862 mfr ref single material response overall
Surface Treatment: phosphate overall
Surface Treatment Document And Classification: gm 4435-m,code a fscm 11862 mfr ref single treatment response 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
11503505	Tapping Screw
1640902	Tapping Screw

FAQs

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

What is the FSCG of the NSN 5305-01-160-3945?

The FSCG of the NSN 5305-01-160-3945 is 5305

Does the NSN 5305-01-160-3945 have a Schedule B code assigned?

Yes, the Schedule B code is 7318140000

Does NSN 5305-01-160-3945 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 5305-01-160-3945 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-160-3945 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 5305-01-160-3945 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Sun, Aug 21, 1983