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5306-00-156-2537

Find complete technical information, availability, and procurement data for: 5306-00-156-2537

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5306-00-156-2537
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5306 Bolts
National Stock Number
5306-00-156-2537
Item Name Code
27851
Assigment Date
01/01/1963 (63 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.

1.281 inches nominal fastener length, 3a thread class, 0.469 inches minimum thread length, 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
0.469 inches minimum
Fastener Length
1.281 inches nominal
Head Style
hexagon
Head Height
0.140 inches minimum and 0.172 inches maximum
Width Between Flats
0.428 inches minimum and 0.440 inches maximum
Hole Diameter
0.046 inches nominal
Grip Diameter
0.2487 inches minimum and 0.2492 inches maximum
Nominal Thread Diameter
0.250 inches
Grip Length
0.812 inches nominal
Hole Quantity
1
Hole Type
drilled
Thread Quantity Per Inch
28
Minimum Tensile Strength
125000 pounds per square inch
Hardness Rating
26.0 rockwell c minimum and 32.0 rockwell c maximum overall
Hole Configuration Style
hexagon flats
Surface Finish
63.0 microinches bearing surface of head
Surface Finish
63.0 microinches grip
Material
steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4037 or steel comp 4140 or steel comp 4130 overall
Material Document And Classification
mil-s-6049 mil spec 1st material response or mil-s-6050 mil spec 2nd material response or mil-s-6098 mil spec 3rd material response or ams 6300 assn std 4th material response or mil-s-5626 mil spec 5th material response or mil-s-6758 mil spec 6th material response overall
Surface Treatment
cadmium and chromate overall
Surface Treatment Document And Classification
qq-p-416 @ty2 cl 3 fed spec single treatment 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
84H12 Close Tolerance Bolt
AN174H12A Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-156-2537?
The FSCG of the NSN 5306-00-156-2537 is 5306
Does the NSN 5306-00-156-2537 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5306-00-156-2537 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 5306-00-156-2537 contain precious materials?
Precious metal content is unknown
Does NSN 5306-00-156-2537 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 5306-00-156-2537 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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