B1821BH125F400N

View detailed technical data, stock status, and sourcing information for: B1821BH125F400N
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-484-2942

Item Name Code

18257

Assigment Date

04/25/2001 (25 years ago)

A circular shaped item designed to be installed in a specially prepared groove or counterbore to provide a low pressure seal. It may be supplied in various cross-sectional shapes. It may be solid or cut through to allow for installation and fitting. Excludes items whose primary function is to provide sealing, wiping, or wearing surface capabilities for piston configurations. See also ring,piston and ring,wiper.

2.543 inches minimum and 2.750 inches maximum thread length, right-hand thread direction, 3.812 inches minimum and 4.000 inches maximum fastener length, 2a thread class, 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: 2.543 inches minimum and 2.750 inches maximum
Fastener Length: 3.812 inches minimum and 4.000 inches maximum
Head Style: hexagon
Head Height: 0.749 inches minimum and 0.813 inches maximum
Width Between Flats: 1.812 inches minimum and 1.875 inches maximum
Nominal Thread Diameter: 1.250 inches
Thread Quantity Per Inch: 12
Material: steel overall
Thread Series Designator: unf

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
AES01FA25D00AW9A91	Hexagon Head Cap Screw
B1821BH125F400N	Hexagon Head Cap Screw
MS90727-277	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-484-2942?

The FSCG of the NSN 5305-01-484-2942 is 5305

Does the NSN 5305-01-484-2942 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-484-2942 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 5305-01-484-2942 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-484-2942 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 5305-01-484-2942 was assigned to the Federal Catalog?

It was assigned 25 years ago, on Wed, Apr 25, 2001