The O-Ring, cataloged under National Stock Number 5331-00-579-7912, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-579-7912 |
| Primary Part Number | MS28775-345 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Outside Diameter | 4.357 INCHES MINIMUM AND 4.433 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.960 INCHES MINIMUM AND 3.990 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4088931 | Oshkosh Defense Llc (USA) |
| PRP568-345-4067-70 | Parco, Llc (USA) |
| 2300-79210 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| AN6227B48 | Columbus Jack Corporation Div Columbus Jack (USA) |
| MS28775-345 PRIMARY | Sae International Dba Sae International (USA) |
| 137604122 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| Reference | Meaning |
|---|---|
| 2-345 N304-75 | 5/9 Secondary reference Parker Hannifin Gmbh O-Ring Division |
| ARP568-345MILP5 516-70DURM | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 6227-48 | 5/9 Secondary reference Trelleborg Sealing Solutions El Segundo, Inc. Dba Tss El Segundo |
| 1183 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2-345 N304-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 1376-04-122P | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| O-3-1-17 | C/1 Advisory reference — outside the item-of-supply concept Bird-Johnson Propeller Company, Llc |
| MS28775-345 | 3/9 Design control — primary reference U.S. Government activity |
| MS28775-345 | 5/9 Secondary reference U.S. Government activity |
| 568-345-4200-70 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS28775-345ES | 5/9 Secondary reference Eriks B.v. |
| 5331PL0810159 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 24362-A2 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-00-579-7912 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-579-7912 has 6 manufacturer part numbers on file: 4088931 (Oshkosh Defense Llc), PRP568-345-4067-70 (Parco, Llc), 2300-79210 (Leonardo S.p.a. - Electronics Division - Defence Business Area), AN6227B48 (Columbus Jack Corporation Div Columbus Jack), MS28775-345 (Sae International Dba Sae International) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5331-01-125-1890. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-345: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Outside Diameter: 4.357 INCHES MINIMUM AND 4.433 INCHES MAXIMUM IN; Center Hole Diameter: 3.960 INCHES MINIMUM AND 3.990 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.