K1901-31-3

View detailed technical data, stock status, and sourcing information for: K1901-31-3
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-015-3368

Item Name Code

05280

Assigment Date

01/18/1976 (50 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

right-hand thread direction, 0.098 inches minimum and 0.103 inches maximum mounting hole diameter, prevailing torque all metal design locking feature, plate nut style, 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
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 0.948 inches maximum
Nut Height: 0.220 inches maximum
Plate Thickness: 0.032 inches nominal
Plate Width: 0.328 inches maximum
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.339 inches minimum and 0.349 inches maximum
Center To Center Distance Between Mounting Holes Along Length: 0.686 inches minimum and 0.690 inches maximum
Temp Rating: 900.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 32
Nominal Thread Size: 0.190 inches
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std single material response overall
Precious Material: silver
Surface Treatment: silver 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
K1901-31-3	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-015-3368?

The FSCG of the NSN 5310-01-015-3368 is 5310

Does the NSN 5310-01-015-3368 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-015-3368 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 5310-01-015-3368 contain precious materials?

Item contains silver.

Does NSN 5310-01-015-3368 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 5310-01-015-3368 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Sun, Jan 18, 1976