5306-01-028-4428

Find complete technical information, availability, and procurement data for: 5306-01-028-4428
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-028-4428

Item Name Code

27851

Assigment Date

10/01/1976 (49 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.

2.501 inches minimum and 2.531 inches maximum fastener length, 0.428 inches minimum and 0.478 inches maximum thread length, 3a 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: 3a
Thread Direction: right-hand
Thread Length: 0.428 inches minimum and 0.478 inches maximum
Fastener Length: 2.501 inches minimum and 2.531 inches maximum
Head Style: hexagon
Head Height: 0.250 inches minimum and 0.265 inches maximum
Width Between Flats: 0.741 inches minimum and 0.752 inches maximum
Grip Diameter: 0.4985 inches minimum and 0.4995 inches maximum
Shank Unthreaded Hole Diameter: 0.106 inches minimum and 0.116 inches maximum first hole
Nominal Thread Diameter: 0.500 inches
Grip Length: 2.053 inches minimum and 2.073 inches maximum
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 180000 pounds per square inch
Distance From Head Largest Bearing Surface To Shank Hole Center: 2.368 inches minimum and 2.418 inches maximum first hole
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: steel or steel comp 4340 overall
Material Document And Classification: ams 6427 assn std 1st material response overall
Surface Treatment: chromium sides of head
Surface Treatment: chromium top of head
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
69-42613-1	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-028-4428?

The FSCG of the NSN 5306-01-028-4428 is 5306

Does the NSN 5306-01-028-4428 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-028-4428 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 5306-01-028-4428 contain precious materials?

Precious metal content is unknown

Does NSN 5306-01-028-4428 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 5306-01-028-4428 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Fri, Oct 1, 1976