The O-Ring, cataloged under National Stock Number 5331-00-702-5643, 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 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 22 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-00-702-5643 |
| Primary Part Number | MS28775-128 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Outside Diameter | 1.675 INCHES MINIMUM AND 1.711 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.481 INCHES MINIMUM AND 1.493 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MS28775-128 | Bae Systems Land & Armaments L.p. (USA) |
| MS28775-128 | Dbr Industries, Inc. Dba Dbr Industries Inc (USA) |
| P48026-128 | Acushnet Rubber Company, Inc. Dba Precix (USA) |
| PRP568-128-4067 70 | Parco, Llc (USA) |
| MS28775-128 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS28775-128ES | 5/9 Secondary reference Eriks B.v. |
| 170160 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MS18775-128 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MS28775-128 | 5/9 Secondary reference U.S. Government activity |
| MS28775-128 | 5/9 Secondary reference Seals & Packings, Llc |
| ARP568-128MILP2 5732 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5330007025643 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS568-128 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5331PL0798589 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS28775-128 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 20597-400 FIND | C/1 Advisory reference — outside the item-of-supply concept Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace |
| 2-128 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| AS568-128MIL-P- 25732 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MS28775-128 | 5/9 Secondary reference Trelleborg Sealing Solutions France |
| ARP568-128MILP5 516-70DURM | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2195120132 | 5/9 Secondary reference U.S. Government activity |
| 02195-1201-32 | 5/9 Secondary reference U.S. Government activity |
| 2-128 N304-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| MS28775-128 | 5/9 Secondary reference Dowty (div De John Crane France Sa) |
NSN 5331-00-702-5643 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: cancelled.
NSN 5331-00-702-5643 has 5 manufacturer part numbers on file: MS28775-128 (Bae Systems Land & Armaments L.p.), MS28775-128 (Dbr Industries, Inc. Dba Dbr Industries Inc), P48026-128 (Acushnet Rubber Company, Inc. Dba Precix), PRP568-128-4067 70 (Parco, Llc), MS28775-128 (Sae International Dba Sae International).
3 possible matches (shared part number, not a government interchangeability claim): 5331-01-225-0802, 5330-01-231-0691, 5331-01-241-1939. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-128: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Outside Diameter: 1.675 INCHES MINIMUM AND 1.711 INCHES MAXIMUM IN; Center Hole Diameter: 1.481 INCHES MINIMUM AND 1.493 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.
NSN 5331-00-702-5643 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.