557570

View detailed technical data, stock status, and sourcing information for: 557570
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-761-3251

Item Name Code

06675

Assigment Date

12/07/1966 (59 years ago)

0.209 inches minimum and 0.229 inches maximum head height, 3.210 inches minimum and 3.230 inches maximum fastener length, hexagon head style, 0.660 inches minimum thread length, right-hand thread direction

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: 0.660 inches minimum
Fastener Length: 3.210 inches minimum and 3.230 inches maximum
Head Style: hexagon
Head Height: 0.209 inches minimum and 0.229 inches maximum
Width Between Flats: 0.553 inches minimum and 0.564 inches maximum
First Diameter From Head: 0.373 inches minimum and 0.374 inches maximum
Second Diameter From Head: 0.315 inches minimum and 0.325 inches maximum
Third Diameter From Head: 0.373 inches minimum and 0.374 inches maximum
Distance From Largest Bearing Surface Of Head To End Of First Diameter: 0.540 inches minimum and 0.560 inches maximum
Distance From Largest Bearing Surface Of Head To End Of Second Diameter: 2.030 inches minimum and 2.050 inches maximum
Distance From Largest Bearing Surface Of Head To End Of Third Diameter: 2.510 inches minimum and 2.570 inches maximum
Nominal Thread Diameter: 0.375 inches
Nonstandard Thread Pitch Diameter: +0.3420 to 0.3449 inches
Thread Quantity Per Inch: 24
Hardness Rating: 30.0 rockwell c minimum and 38.0 rockwell c maximum overall
Externally Relieved Body Diameter Quantity: 3
Part Name Assigned By Controlling Agency: navy special project
Material: steel corrosion resisting overall
Material Document And Classification: ams 5616 assn std single material response overall
Surface Treatment: passivate 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
557570	Externally Relieved Body Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-761-3251?

The FSCG of the NSN 5306-00-761-3251 is 5306

Does the NSN 5306-00-761-3251 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-761-3251 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 5306-00-761-3251 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-00-761-3251 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 5306-00-761-3251 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Wed, Dec 7, 1966