PBF1253-5D40

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-044-8529

Item Name Code

27851

Assigment Date

07/22/1977 (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.

3a thread class, 2.951 inches minimum and 2.998 inches maximum fastener length, 0.441 inches minimum and 0.508 inches maximum thread length, double hexagon head style, 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: 0.441 inches minimum and 0.508 inches maximum
Fastener Length: 2.951 inches minimum and 2.998 inches maximum
Head Style: double hexagon
Head Height: 0.177 inches minimum and 0.197 inches maximum
Width Between Flats: 0.492 inches minimum and 0.502 inches maximum
Grip Diameter: 0.3115 inches minimum and 0.3120 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.081 inches maximum first hole
Nominal Thread Diameter: 0.312 inches
Grip Length: 2.490 inches minimum and 2.510 inches maximum
Thread Quantity Per Inch: 24
Distance From Head Largest Bearing Surface To Shank Hole Center: 2.827 inches minimum and 2.884 inches maximum first hole
Material: steel comp xm-13 overall
Thread Series Designator: unjf
Specification/Standard Data: 76301-st3-453 professional/industrial association standard

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
109453-5D40	Close Tolerance Bolt
11825-5D40	Close Tolerance Bolt
AIC753-5D40	Close Tolerance Bolt
BM17019-5D40	Close Tolerance Bolt
FIT7047-5D40	Close Tolerance Bolt
GS1016-5D40	Close Tolerance Bolt
HP5453-5D40	Close Tolerance Bolt
MB61-5D40	Close Tolerance Bolt
PBF1253-5D40	Close Tolerance Bolt
S11-1060-5D40	Close Tolerance Bolt
S353-5D40	Close Tolerance Bolt
SLB252-5D40	Close Tolerance Bolt
ST3M453-5D40	Close Tolerance Bolt
US3204-5D40	Close Tolerance Bolt
VAL23029-5D40	Close Tolerance Bolt
VS3204-5D40	Close Tolerance Bolt
WC453-5D40	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-044-8529?

The FSCG of the NSN 5306-01-044-8529 is 5306

Does the NSN 5306-01-044-8529 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-044-8529 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 5306-01-044-8529 contain precious materials?

Precious metal content is unknown

Does NSN 5306-01-044-8529 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 5306-01-044-8529 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Fri, Jul 22, 1977