B1821BH031C425L

View detailed technical data, stock status, and sourcing information for: B1821BH031C425L
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-220-0187

Item Name Code

01847

Assigment Date

11/06/1985 (40 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.

right-hand thread direction, hexagon head style, 0.875 inches minimum thread length, 4.188 inches minimum and 4.250 inches maximum 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: 0.875 inches minimum
Fastener Length: 4.188 inches minimum and 4.250 inches maximum
Head Style: hexagon
Head Height: 0.195 inches minimum and 0.211 inches maximum
Width Between Flats: 0.489 inches minimum and 0.500 inches maximum
Locking Feature: patch or pellet threads
Nominal Thread Diameter: 0.312 inches
Features Provided: finished head
Thread Quantity Per Inch: 18
Minimum Tensile Strength: 150000 pounds per square inch
Hardness Rating: 33.0 rockwell c minimum and 39.0 rockwell c maximum fastener
Material: plastic polyamide (nylon) locking feature
Material: steel fastener
Material Document And Classification: sae j429,grade 8 assn std single material response or astm a354,grade bd assn std single material response fastener
Surface Treatment: zinc and chromate fastener
Surface Treatment Document And Classification: astm b633 ty 2 sc 3 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
AEB02C312D25AW9A96	Machine Bolt
B1821BH031C425L	Machine Bolt
MS90728-49L	Machine Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-220-0187?

The FSCG of the NSN 5306-01-220-0187 is 5306

Does the NSN 5306-01-220-0187 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-220-0187 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 5306-01-220-0187 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-220-0187 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 5306-01-220-0187 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Wed, Nov 6, 1985