BM55132-6-21A

View detailed technical data, stock status, and sourcing information for: BM55132-6-21A
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-948-0643

Item Name Code

15903

Assigment Date

04/06/1966 (60 years ago)

A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.

3a thread class, 1.712 inches nominal fastener length, double hexagon head style, 0.400 inches minimum thread length, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.400 inches minimum
Fastener Length: 1.712 inches nominal
Head Style: double hexagon
Head Height: 0.210 inches nominal
Width Between Flats: 0.553 inches minimum and 0.564 inches maximum
Grip Diameter: 0.3733 inches minimum and 0.3742 inches maximum
Nominal Thread Diameter: 0.375 inches
Grip Length: 1.312 inches nominal
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 220000 pounds per square inch
Hardness Rating: 46.0 rockwell c minimum and 50.0 rockwell c maximum overall
Material: steel overall
Material Document And Classification: sps-m-107,fscm 03680 mfr ref single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: nas 672 assn std single treatment response overall
Thread Series Designator: unjf

Replaces National Stock Numbers

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

NSN	Name	Date
5306-01-131-8459	No Name Available	06/01/2007

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
202-15520-6-21	Shear Bolt
AIC220-6A21	Shear Bolt
AIC516B6-21	Shear Bolt
BM17020-6-21A	Shear Bolt
BM55132-6-21A	Shear Bolt
C081-6-21	Shear Bolt
EWSB22-6A21	Shear Bolt
EWSB22D6-A21	Shear Bolt
GB511B6-21	Shear Bolt
H401-6-21	Shear Bolt
VAL22034-6F21	Shear Bolt
VAL22034-6G21	Shear Bolt
VS2521-6F21	Shear Bolt
VS3071-6F21	Shear Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-948-0643?

The FSCG of the NSN 5306-00-948-0643 is 5306

Does the NSN 5306-00-948-0643 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-948-0643 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 5306-00-948-0643 contain precious materials?

Precious metal content is unknown

Does NSN 5306-00-948-0643 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 5306-00-948-0643 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Wed, Apr 6, 1966