MS21087L4

View detailed technical data, stock status, and sourcing information for: MS21087L4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-512-5126

Item Name Code

05280

Assigment Date

08/03/1974 (52 years ago)

right-hand thread direction, dry film lubricant lubrication, 0.254 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: 0.254 inches minimum nut
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 0.591 inches maximum
Nut Height: 0.281 inches maximum
Plate Thickness: 0.055 inches maximum
Plate Width: 0.380 inches minimum and 0.414 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: 0.276 inches minimum and 0.286 inches maximum
Center To Center Distance Between Mounting Holes Along Width: 0.217 inches minimum and 0.221 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unf
Thread Quantity Per Inch: 28
Hardness Rating: 49.0 rockwell c maximum
Nominal Thread Size: 0.250 inches
Material: iron alloy 660 overall
Material Document And Classification: ams 5732 assn std single material response or ams 5731 assn std single material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-174-4798	No Name Available	01/01/1993

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
M1274E048BC	Plate Self-Locking Nut
MA 12740E-048	Plate Self-Locking Nut
MK4001-4	Plate Self-Locking Nut
MS21087L4	Plate Self-Locking Nut
MT13C428M	Plate Self-Locking Nut
R300C4M	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-512-5126?

The FSCG of the NSN 5310-00-512-5126 is 5310

Does the NSN 5310-00-512-5126 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-512-5126 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 5310-00-512-5126 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-512-5126 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 5310-00-512-5126 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Sat, Aug 3, 1974