B1821BH125C300L

View detailed technical data, stock status, and sourcing information for: B1821BH125C300L
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-529-4193

Item Name Code

18257

Assigment Date

04/15/2005 (21 years ago)

An assembly which consists of a shaft, shouldered and components such as couplings, flanges, and the like. The shaft and components are usually welded together.

right-hand thread direction, hexagon head style, 3.000 inches nominal thread length, 3.000 inches nominal fastener length, 2a thread class

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: 3.000 inches nominal
Fastener Length: 3.000 inches nominal
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
Locking Feature: patch or strip threads
End Item Identification: an/sqs-56 sonar composite dome
Nominal Thread Diameter: 1.250 inches
Thread Quantity Per Inch: 7
Material: plastic polyamide (nylon) locking feature
Material: steel uns k04100 fastener
Material Document And Classification: astm a 354 gr bd assn std single material response fastener
Material Document And Classification: mil-f-18240 mil spec single material response locking feature
Surface Treatment: zinc and chromate fastener
Surface Treatment Document And Classification: astm b 633 assn std single treatment response fastener
Thread Series Designator: unc

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
B1821BH125C300L	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-529-4193?

The FSCG of the NSN 5305-01-529-4193 is 5305

Does the NSN 5305-01-529-4193 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-529-4193 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 5305-01-529-4193 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-529-4193 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 5305-01-529-4193 was assigned to the Federal Catalog?

It was assigned 21 years ago, on Fri, Apr 15, 2005