318S20

View detailed technical data, stock status, and sourcing information for: 318S20
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5331 O-Ring

National Stock Number

5331-00-585-0398

Item Name Code

47946

Assigment Date

01/01/1963 (63 years ago)

A nonmetallic circular item with an aperature, having a solid round cross-section. They are used primarily for sealing. For items with other than round cross section, see packing,preformed. For noncircular items with a round cross-section, see seal,nonmetallic round section and rubber,round section.

rubber butadiene-acrylonitrile class nbr material, 65.0 shore durometer a nominal hardness rating, 4.226 inches minimum and 4.298 inches maximum outside diameter, 0.135 inches minimum and 0.143 inches maximum cross-sectional height, 3.969 inches minimum and 3.999 inches maximum center hole diameter

Product Characteristics

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

Outside Diameter: 4.226 inches minimum and 4.298 inches maximum
Cross-Sectional Height: 0.135 inches minimum and 0.143 inches maximum
Center Hole Diameter: 3.969 inches minimum and 3.999 inches maximum
Hardness Rating: 65.0 shore durometer a nominal
Material: rubber butadiene-acrylonitrile class nbr

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2915-00-599-6487	No Name Available	01/01/1960

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
2-242 N506-65	O-Ring
218952	O-Ring
318S20	O-Ring
AS3578-242	O-Ring
MS9021-242	O-Ring
PRP568-242-4024-65	O-Ring

FAQs

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

What is the FSCG of the NSN 5331-00-585-0398?

The FSCG of the NSN 5331-00-585-0398 is 5331

Does the NSN 5331-00-585-0398 have a Schedule B code assigned?

Yes, the Schedule B code is 4016930000

Does NSN 5331-00-585-0398 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 5331-00-585-0398 contain precious materials?

Item does not contain precious metal.

Does NSN 5331-00-585-0398 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 5331-00-585-0398 was assigned to the Federal Catalog?

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