5306-01-287-6621

Find complete technical information, availability, and procurement data for: 5306-01-287-6621
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-287-6621

Item Name Code

27851

Assigment Date

10/25/1988 (37 years ago)

An externally threaded fastener whose unthreaded portion is of a specified 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. 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. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

3a thread class, 0.505 inches minimum and 0.535 inches maximum thread length, right-hand thread direction, 1.479 inches minimum and 1.499 inches maximum fastener length, double hexagon extended washer 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: 3a
Thread Direction: right-hand
Thread Length: 0.505 inches minimum and 0.535 inches maximum
Fastener Length: 1.479 inches minimum and 1.499 inches maximum
Head Style: double hexagon extended washer
Head Height: 0.293 inches minimum and 0.313 inches maximum
Width Between Flats: 0.312 inches nominal
Extended Washer Diameter: 0.428 inches minimum and 0.448 inches maximum
Extended Washer Thickness: 0.060 inches minimum and 0.070 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.964 inches minimum and 0.974 inches maximum
Thread Quantity Per Inch: 28
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: nickel alloy 718 overall
Material Document And Classification: c50tf13 cl-b cage 07482 mfr ref single material response overall
Thread Series Designator: unjf

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
J814P055A	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-287-6621?

The FSCG of the NSN 5306-01-287-6621 is 5306

Does the NSN 5306-01-287-6621 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5306-01-287-6621 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 5306-01-287-6621 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-287-6621 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 5306-01-287-6621 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Tue, Oct 25, 1988