CLASS1SIZE257

View detailed technical data, stock status, and sourcing information for: CLASS1SIZE257
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5331 O-Ring

National Stock Number

5331-01-028-0818

Item Name Code

47946

Assigment Date

09/24/1976 (49 years ago)

331 maximum elongation percentage, 0.135 inches minimum and 0.143 inches maximum cross-sectional height, 5.836 inches minimum and 5.882 inches maximum center hole diameter, -30.0 fahrenheit and 250.0 fahrenheit temp rating, 6.094 inches minimum and 6.180 inches maximum outside 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: 6.094 inches minimum and 6.180 inches maximum
Temp Rating: -30.0 fahrenheit and 250.0 fahrenheit
Cross-Sectional Height: 0.135 inches minimum and 0.143 inches maximum
Center Hole Diameter: 5.836 inches minimum and 5.882 inches maximum
Elongation Percentage: 331 maximum
Hardness Rating: 70.0 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Below is a list of NSNs that have been officially superseded by this NSN: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
5330-00-881-2667	No Name Available	09/01/1989

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
2-257 N674-7	O-Ring
2-257 N674-70	O-Ring
2-257N674-70	O-Ring
257-8307	O-Ring
AS568-257	O-Ring
CLASS1SIZE257	O-Ring
J120A	O-Ring
PRP257-8307	O-Ring
VT10102	O-Ring

FAQs

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

What is the FSCG of the NSN 5331-01-028-0818?

The FSCG of the NSN 5331-01-028-0818 is 5331

Does the NSN 5331-01-028-0818 have a Schedule B code assigned?

Yes, the Schedule B code is 4016930000

Does NSN 5331-01-028-0818 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 5331-01-028-0818 contain precious materials?

Precious metal content is unknown

Does NSN 5331-01-028-0818 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 5331-01-028-0818 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Fri, Sep 24, 1976