B1821BH056C250N

View detailed technical data, stock status, and sourcing information for: B1821BH056C250N
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-724-5809

Item Name Code

18257

Assigment Date

01/01/1960 (66 years ago)

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

2.500 inches nominal fastener length, 1.375 inches minimum and 1.583 inches maximum thread length, 2a thread class, right-hand thread direction, 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: 1.375 inches minimum and 1.583 inches maximum
Fastener Length: 2.500 inches nominal
Head Style: hexagon
Head Height: 0.348 inches minimum and 0.371 inches maximum
Width Between Flats: 0.798 inches minimum and 0.812 inches maximum
Nominal Thread Diameter: 0.562 inches
Thread Quantity Per Inch: 12
Minimum Tensile Strength: 150000 pounds per square inch
Minimum Yield Strength: 120000 pounds per square inch
Material: steel overall
Material Document And Classification: saej429 grade8 assn std single material response or astma354 grade bd assn std single material response overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: astm b633 ty 2 sc 3 assn std single treatment response overall
Thread Series Designator: unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-01-275-3286	No Name Available	07/01/1991

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
860-525	Hexagon Head Cap Screw
B1821BH056C250N	Hexagon Head Cap Screw
MS90728-142	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-724-5809?

The FSCG of the NSN 5305-00-724-5809 is 5305

Does the NSN 5305-00-724-5809 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-724-5809 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 5305-00-724-5809 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-724-5809 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 5305-00-724-5809 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960