5310-01-237-5557

Find complete technical information, availability, and procurement data for: 5310-01-237-5557
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-237-5557

Item Name Code

15887

Assigment Date

08/01/1986 (40 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.

2.750 inches nominal nut diameter, 2b thread class, round nut style, +1.1835 to 1.1970 inches thread pitch diameters, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 2b
Thread Pitch Diameters: +1.1835 to 1.1970 inches
Thread Direction: right-hand
Nut Style: round
Nut Diameter: 2.750 inches nominal
Nut Thickness: 1.250 inches nominal
Hole Type And Quantity: 4 tapped
Thread Series: un
Thread Quantity Per Inch: 8
Nominal Thread Size: 1.188 inches
Hole Thread Quantity Per Inch: 20
Hole Configuration Style: configuration j
Criticality Code Justification: zzzy
Hole Nominal Thread Diameter: 0.250 inches
Material: steel comp 4340 overall
Material Document And Classification: mil-s-5000,cond c mil spec single material response overall
Surface Treatment: nickel overall
Surface Treatment Document And Classification: mil-c-26074,class 1,grade a mil spec single treatment response overall
Reference Number Differentiating Characteristics: material will be in accordance with ships parts control center activity hx quality control,manufacturing and testing specifications

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
926B809	Round Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-237-5557?

The FSCG of the NSN 5310-01-237-5557 is 5310

Does the NSN 5310-01-237-5557 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-237-5557 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 5310-01-237-5557 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-237-5557 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 5310-01-237-5557 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Fri, Aug 1, 1986