990291-31,41,51

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-232-0728

Item Name Code

05280

Assigment Date

10/19/1970 (55 years ago)

plate nut style, prevailing torque all metal design locking feature, 3b thread class, right-hand thread direction, 0.066 inches minimum and 0.071 inches maximum mounting hole 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
Mounting Hole Diameter: 0.066 inches minimum and 0.071 inches maximum
Nut Style: plate
Nut Length: 0.331 inches maximum
Nut Height: 0.143 inches maximum
Plate Thickness: 0.040 inches maximum
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.143 inches minimum and 0.153 inches maximum
Temp Rating: 900.0 fahrenheit maximum
Thread Series: unjc
Thread Quantity Per Inch: 40
Nominal Thread Size: 0.112 inches
Part Name Assigned By Controlling Agency: navy special project
Material: iron alloy 660 overall
Precious Material And Location: overall silver
Precious Material: silver
Surface Treatment: silver overall
Surface Treatment Document And Classification: ams 2410 assn std single treatment response or ams 2411 assn std single treatment 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
990291-31	Plate Self-Locking Nut
990291-31,41,51	Plate Self-Locking Nut
LHTA55M2860-40	Plate Self-Locking Nut
MA12720-40	Plate Self-Locking Nut
MK3331-04	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-232-0728?

The FSCG of the NSN 5310-00-232-0728 is 5310

Does the NSN 5310-00-232-0728 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-232-0728 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 5310-00-232-0728 contain precious materials?

Item contains silver.

Does NSN 5310-00-232-0728 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 5310-00-232-0728 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Mon, Oct 19, 1970