NAS6312C31D

View detailed technical data, stock status, and sourcing information for: NAS6312C31D
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-347-0662

Item Name Code

15903

Assigment Date

10/14/1991 (34 years ago)

A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. 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. The unthreaded portion is of specific 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. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.

3a thread class, dished hexagon head style, right-hand thread direction, 0.666 inches nominal thread length, 2.589 inches minimum and 2.619 inches maximum fastener length

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: 0.666 inches nominal
Fastener Length: 2.589 inches minimum and 2.619 inches maximum
Head Style: dished hexagon
Head Height: 0.375 inches minimum and 0.390 inches maximum
Width Between Flats: 1.052 inches minimum and 1.065 inches maximum
Grip Diameter: 0.7480 inches minimum and 0.7490 inches maximum
Shank Unthreaded Hole Diameter: 0.141 inches minimum and 0.151 inches maximum first hole
Nominal Thread Diameter: 0.750 inches
Grip Length: 1.928 inches minimum and 1.948 inches maximum
Thread Quantity Per Inch: 16
Minimum Tensile Strength: 160000 pounds per square inch
Distance From Head Largest Bearing Surface To Shank Hole Center: 2.231 inches minimum and 2.281 inches maximum first hole
Surface Finish: 32.0 microinches bearing surface of head32.0 microinches grip32.0 microinches threads
Material: iron alloy 660 overall
Material Document And Classification: ams 5731 assn std single material response or ams 5737 assn std single material response overall
Surface Treatment: chromium grip
Surface Treatment Document And Classification: qq-c-320 cl2 fed spec single treatment response grip
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas6312 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
NAS6312C31D	Shear Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-347-0662?

The FSCG of the NSN 5306-01-347-0662 is 5306

Does the NSN 5306-01-347-0662 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-347-0662 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 5306-01-347-0662 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-347-0662 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 5306-01-347-0662 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Mon, Oct 14, 1991