C20618-1

View detailed technical data, stock status, and sourcing information for: C20618-1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-393-2593

Item Name Code

15934

Assigment Date

07/18/1994 (32 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.

0.500 inches nominal outside diameter, 0.025 inches nominal shoulder height, 0.343 inches nominal shoulder diameter, 0.090 inches nominal overall height, 0.295 inches nominal hole diameter

Product Characteristics

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

Hole Diameter: 0.295 inches nominal
Shoulder Diameter: 0.343 inches nominal
Outside Diameter: 0.500 inches nominal
Overall Height: 0.090 inches nominal
Shoulder Height: 0.025 inches nominal
Color: black overall
Material: plastic nylon overall
Style Designator: shouldered

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
BNC-312	Shouldered Washer
C20618-1	Shouldered Washer

FAQs

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

What is the FSCG of the NSN 5310-01-393-2593?

The FSCG of the NSN 5310-01-393-2593 is 5310

Does the NSN 5310-01-393-2593 have a Schedule B code assigned?

Yes, the Schedule B code is 3926904500

Does NSN 5310-01-393-2593 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 5310-01-393-2593 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-393-2593 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 5310-01-393-2593 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Mon, Jul 18, 1994