5306-01-251-4990

Find complete technical information, availability, and procurement data for: 5306-01-251-4990
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-251-4990

Item Name Code

06666

Assigment Date

03/19/1987 (39 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.

1.428 inches minimum and 1.438 inches maximum head diameter, 1.187 inches minimum and 1.312 inches maximum thread length, right-hand thread direction, 2.052 inches minimum and 2.072 inches maximum fastener length, 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: 1.187 inches minimum and 1.312 inches maximum
Fastener Length: 2.052 inches minimum and 2.072 inches maximum
Head Diameter: 1.428 inches minimum and 1.438 inches maximum
Head Height: 0.865 inches minimum and 0.885 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.875 inches
Width Across Flats: 0.626 inches minimum and 0.630 inches maximum
Thread Quantity Per Inch: 14
Minimum Tensile Strength: 180000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Material: steel comp e4340 or steel comp 4140 or steel comp 8735 or steel comp 8740 or steel comp 6150 overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 ty 2 cl 2 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
123PM10404-1	Internal Wrenching Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-251-4990?

The FSCG of the NSN 5306-01-251-4990 is 5306

Does the NSN 5306-01-251-4990 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-251-4990 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 5306-01-251-4990 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-251-4990 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 5306-01-251-4990 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Thu, Mar 19, 1987