ST3M657C7

View detailed technical data, stock status, and sourcing information for: ST3M657C7
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-004-6951

Item Name Code

05280

Assigment Date

05/29/1975 (51 years ago)

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

right-hand thread direction, dry film lubricant lubrication, 0.442 inches minimum nut counterbore diameter, 3b thread class, prevailing torque all metal design locking feature

Product Characteristics

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

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Counterbore Diameter: 0.442 inches minimum nut
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.130 inches minimum and 0.135 inches maximum
Nut Style: plate
Nut Length: 1.602 inches maximum
Nut Height: 0.400 inches maximum
Plate Thickness: 0.032 inches nominal
Plate Width: 0.859 inches maximum
Nut Counterbore Depth: 0.062 inches minimum nut
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.620 inches minimum and 0.630 inches maximum
Center To Center Distance Between Mounting Holes Along Length: 1.248 inches minimum and 1.252 inches maximum
Thread Series: unjf
Features Provided: floating nut
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.438 inches
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std 1st material response or ams 5735 assn std 2nd material response overall

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
F49562-7	Plate Self-Locking Nut
ST3M657C7	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-004-6951?

The FSCG of the NSN 5310-01-004-6951 is 5310

Does the NSN 5310-01-004-6951 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-004-6951 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 5310-01-004-6951 contain precious materials?

Precious metal content is unknown

Does NSN 5310-01-004-6951 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 5310-01-004-6951 was assigned to the Federal Catalog?

It was assigned 51 years ago, on Thu, May 29, 1975