MS28775-394

View detailed technical data, stock status, and sourcing information for: MS28775-394
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5331 O-Ring

National Stock Number

5331-01-232-4255

Item Name Code

47946

Assigment Date

05/14/1986 (40 years ago)

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

24.880 inches minimum and 25.000 inches maximum center hole diameter, 75.0 shore durometer a nominal hardness rating, rubber butadiene-acrylonitrile class nbr material, 25.235 inches minimum and 25.485 inches maximum outside diameter, 0.205 inches minimum and 0.215 inches maximum cross-sectional height

Product Characteristics

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

Outside Diameter: 25.235 inches minimum and 25.485 inches maximum
Cross-Sectional Height: 0.205 inches minimum and 0.215 inches maximum
Center Hole Diameter: 24.880 inches minimum and 25.000 inches maximum
Hardness Rating: 75.0 shore durometer a nominal
Material: rubber butadiene-acrylonitrile class nbr

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
1C-4355 PIECE 63	O-Ring
2-394N304-75	O-Ring
MS28775-394	O-Ring

FAQs

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

What is the FSCG of the NSN 5331-01-232-4255?

The FSCG of the NSN 5331-01-232-4255 is 5331

Does the NSN 5331-01-232-4255 have a Schedule B code assigned?

Yes, the Schedule B code is 4016930000

Does NSN 5331-01-232-4255 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 5331-01-232-4255 contain precious materials?

Item does not contain precious metal.

Does NSN 5331-01-232-4255 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 5331-01-232-4255 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Wed, May 14, 1986