B18231B08020N

View detailed technical data, stock status, and sourcing information for: B18231B08020N
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-303-5631

Item Name Code

18257

Assigment Date

07/01/1989 (37 years ago)

17.5 millimeters minimum and 20.0 millimeters maximum thread length, 5.10 millimeters minimum and 5.50 millimeters maximum head height, right-hand thread direction, hexagon head style, 20.0 millimeters 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.

Thread Direction: right-hand
Thread Length: 17.5 millimeters minimum and 20.0 millimeters maximum
Fastener Length: 20.0 millimeters nominal
Head Style: hexagon
Head Height: 5.10 millimeters minimum and 5.50 millimeters maximum
Width Between Flats: 12.73 millimeters minimum and 13.00 millimeters maximum
End Item Identification: mrap rg-31/route clearance vehicle
Nominal Thread Diameter: 8.0 millimeters
Thread Pitch In Millimeters: 1.25
External Thread Tolerance Class: 6g
Material: steel property class 10.9 overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: qq-z-325 ty 2 cl 3 fed spec single treatment response overall
Thread Series Designator: m

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
12485434-092	Hexagon Head Cap Screw
AES07M08B020CG8A81	Hexagon Head Cap Screw
B18231B08020N	Hexagon Head Cap Screw
DIN931M8X20	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-303-5631?

The FSCG of the NSN 5305-01-303-5631 is 5305

Does the NSN 5305-01-303-5631 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-303-5631 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 5305-01-303-5631 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-303-5631 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 5305-01-303-5631 was assigned to the Federal Catalog?

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