320917PC1

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5330 Packing and Gasket Materials

National Stock Number

5330-00-171-6843

Item Name Code

37840

Assigment Date

01/01/1963 (63 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.

1.625 inches nominal aperture diameter, 2.750 inches nominal outside diameter, 0.531 inches nominal bearing surface width, metal winding w/ soft filler and inner and outer rings cross-sectional shape style, 4.625 inches nominal gage ring outside diameter

Product Characteristics

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

Cross-Sectional Shape Style: metal winding w/ soft filler and inner and outer rings
Outside Diameter: 2.750 inches nominal
Aperture Diameter: 1.625 inches nominal
Bearing Surface Width: 0.531 inches nominal
Gage Ring Outside Diameter: 4.625 inches nominal
Cross-Sectional Thickness: 0.170 inches minimum and 0.180 inches maximum
Gage Ring Thickness: 0.122 inches minimum and 0.128 inches maximum
Material: asbestos and steel comp 304 overall
Style Designator: circular

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
320917PC1	Spiral Wound Gasket

FAQs

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

What is the FSCG of the NSN 5330-00-171-6843?

The FSCG of the NSN 5330-00-171-6843 is 5330

Does NSN 5330-00-171-6843 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 5330-00-171-6843 contain precious materials?

Precious metal content is unknown

Does NSN 5330-00-171-6843 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5330-00-171-6843 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963