MS21074L3K

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-763-7877

Item Name Code

05280

Assigment Date

01/01/1960 (66 years ago)

prevailing torque all metal design locking feature, right-hand thread direction, dry film lubricant lubrication, 3b thread class, 0.194 inches minimum nut counterbore diameter

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: 0.194 inches minimum nut
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 0.526 inches maximum
Nut Height: 0.250 inches maximum
Plate Thickness: 0.047 inches maximum
Nut Counterbore Depth: 0.062 inches minimum nut
Nut Mounting Provision: countersunk holes
Mounting Provision Location: opposite nut projection side
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.245 inches minimum and 0.255 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 32
Nominal Thread Size: 0.190 inches
Mounting Hole Countersink Angle: 98.0 degrees minimum and 102.0 degrees maximum
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std single material response or ams 5735 assn std single material response or ams 5737 assn std single material response overall
Surface Treatment: passivate 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
M 12720E-02BC	Plate Self-Locking Nut
MK3001-3BC	Plate Self-Locking Nut
MS21074L3K	Plate Self-Locking Nut
MT7C1032BCM	Plate Self-Locking Nut
RM300C3MK	Plate Self-Locking Nut
RMLHAT55M2860-02BC	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-763-7877?

The FSCG of the NSN 5310-00-763-7877 is 5310

Does the NSN 5310-00-763-7877 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-763-7877 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 5310-00-763-7877 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-763-7877 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 5310-00-763-7877 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960