F50403-4-2

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-025-4391

Item Name Code

05280

Assigment Date

08/02/1976 (50 years ago)

A nut having a sleeve portion on its under side, which can be crimped or clinched to hold the item in place when inserted in a hole. An integral feature is incorporated for locking.

prevailing torque all metal design locking feature, dry film lubricant lubrication, 0.098 inches minimum and 0.103 inches maximum mounting hole diameter, right-hand thread direction, 3b thread class

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
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 1.038 inches maximum
Nut Height: 0.339 inches maximum
Nut Counterbore Depth: 0.125 inches minimum nut
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.495 inches minimum and 0.505 inches maximum
Center To Center Distance Between Mounting Holes Along Width: 0.705 inches minimum and 0.709 inches maximum
Thread Series: unf
Features Provided: floating nut
Thread Quantity Per Inch: 28
Nominal Thread Size: 0.250 inches
Special Features: color yellow
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std single material response or ams 5732 assn std single material response overall
Specification/Standard Data: 76301-st3-721 manufacturers 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
10121995	Plate Self-Locking Nut
F12092-2-4	Plate Self-Locking Nut
F50403-4-2	Plate Self-Locking Nut
NS202183-4-2	Plate Self-Locking Nut
ST3M721C4M2	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-025-4391?

The FSCG of the NSN 5310-01-025-4391 is 5310

Does the NSN 5310-01-025-4391 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-025-4391 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 5310-01-025-4391 contain precious materials?

Precious metal content is unknown

Does NSN 5310-01-025-4391 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 5310-01-025-4391 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Mon, Aug 2, 1976