5306-00-637-8688

Find complete technical information, availability, and procurement data for: 5306-00-637-8688
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-637-8688

Item Name Code

06675

Assigment Date

01/01/1963 (63 years ago)

right-hand thread direction, 1.678 inches minimum and 1.698 inches maximum fastener length, 0.730 inches minimum and 0.770 inches maximum thread length, double hexagon w/hole head style, 0.320 inches minimum and 0.340 inches maximum head height

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Direction: right-hand
Thread Length: 0.730 inches minimum and 0.770 inches maximum
Fastener Length: 1.678 inches minimum and 1.698 inches maximum
Head Style: double hexagon w/hole
Head Height: 0.320 inches minimum and 0.340 inches maximum
Width Between Flats: 0.304 inches minimum and 0.313 inches maximum
Extended Washer Diameter: 0.428 inches minimum and 0.448 inches maximum
Extended Washer Thickness: 0.060 inches minimum and 0.070 inches maximum
Hole Diameter: 0.062 inches nominal
First Diameter From Head: 0.218 inches minimum and 0.228 inches maximum
Distance From Largest Bearing Surface Of Head To End Of First Diameter: 0.928 inches minimum and 0.948 inches maximum
Nominal Thread Diameter: 0.250 inches
Hole Quantity: 4
Hole Type: drilled
Nonstandard Thread Pitch Diameter: +0.2216 to 0.2238 inches
Thread Quantity Per Inch: 28
Hardness Rating: 30.0 rockwell c minimum and 38.0 rockwell c maximum overall
Hole Configuration Style: hexagon longitudinal hole
Externally Relieved Body Diameter Quantity: 1
Material: steel comp 601 overall
Material Document And Classification: ams 6304 assn std single material response overall
Surface Treatment: nickel and cadmium overall
Surface Treatment Document And Classification: ams 2416 assn std all treatment responses overall
Thread Series Designator: unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5306-00-638-3799	No Name Available	01/01/1961

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
261012	Externally Relieved Body Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-637-8688?

The FSCG of the NSN 5306-00-637-8688 is 5306

Does the NSN 5306-00-637-8688 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-637-8688 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 5306-00-637-8688 contain precious materials?

Precious metal content is unknown

Does NSN 5306-00-637-8688 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 5306-00-637-8688 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963