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5306-00-720-7961

Find complete technical information, availability, and procurement data for: 5306-00-720-7961

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5306-00-720-7961
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5306 Bolts
National Stock Number
5306-00-720-7961
Item Name Code
15903
Assigment Date
01/01/1963 (63 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.

right-hand thread direction, dished hexagon head style, 3a thread class, 0.316 inches minimum thread length, 2.941 inches nominal 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
0.316 inches minimum
Fastener Length
2.941 inches nominal
Head Style
dished hexagon
Head Height
0.125 inches nominal
Width Between Flats
0.430 inches minimum and 0.439 inches maximum
Grip Diameter
0.2485 inches minimum and 0.2495 inches maximum
Shank Unthreaded Hole Diameter
0.076 inches nominal first hole
Nominal Thread Diameter
0.250 inches
Grip Length
2.625 inches nominal
Thread Quantity Per Inch
28
Minimum Tensile Strength
160000 pounds per square inch
Hardness Rating
36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center
2.825 inches nominal first hole
Material
steel comp 4140 or steel comp e4340 or steel comp 6150 or steel comp 8735 or steel comp 8740 or steel comp 4037 overall
Material Document And Classification
mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-8503 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-6049 mil spec 5th material response or mil-s-8695 mil spec 6th material response overall
Surface Treatment
cadmium and chromate overall
Surface Treatment Document And Classification
qq-p-416,type 2,class 3 fed spec single treatment response overall
Thread Series Designator
unf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5306-00-720-6570 No Name Available 10/01/1982

Related Parts

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Part Number Name
NAS1104-42D Shear Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-720-7961?
The FSCG of the NSN 5306-00-720-7961 is 5306
Does the NSN 5306-00-720-7961 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5306-00-720-7961 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 5306-00-720-7961 contain precious materials?
Precious metal content is unknown
Does NSN 5306-00-720-7961 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 5306-00-720-7961 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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