6871521-11

View detailed technical data, stock status, and sourcing information for: 6871521-11
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-495-4279

Item Name Code

01847

Assigment Date

06/25/1971 (55 years ago)

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

0.626 inches minimum and 0.686 inches maximum thread length, 0.938 inches nominal fastener length, double hexagon w/hole head style, right-hand thread direction, 3a 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: 3a
Thread Direction: right-hand
Thread Length: 0.626 inches minimum and 0.686 inches maximum
Fastener Length: 0.938 inches nominal
Head Style: double hexagon w/hole
Head Height: 0.375 inches nominal
Width Between Flats: 0.367 inches minimum and 0.375 inches maximum
Extended Washer Diameter: 0.500 inches nominal
Extended Washer Thickness: 0.070 inches minimum and 0.080 inches maximum
Nominal Thread Diameter: 0.312 inches
Grip Length: 0.252 inches minimum and 0.312 inches maximum
Features Provided: finished head
Thread Quantity Per Inch: 24
Hardness Rating: 32.0 rockwell c minimum and 38.0 rockwell c maximum overall
Surface Finish: 63.0 microinches bearing surface of head
Surface Finish: 63.0 microinches grip
Material: steel comp 630 overall
Material Document And Classification: ams 5643 assn std single material response 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
6871521-11	Machine Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-495-4279?

The FSCG of the NSN 5306-00-495-4279 is 5306

Does the NSN 5306-00-495-4279 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-495-4279 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 5306-00-495-4279 contain precious materials?

Precious metal content is unknown

Does NSN 5306-00-495-4279 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 5306-00-495-4279 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Fri, Jun 25, 1971