The O-Ring, cataloged under National Stock Number 5331-00-618-4603, 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through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-618-4603 |
| Primary Part Number | MS28775-144 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Outside Diameter | 2.667 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN |
| Center Hole Diameter | 2.477 INCHES MINIMUM AND 2.497 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 |
|---|---|
| PRP568-37-4067-70 | Parco, Llc (USA) |
| 1376-15-172 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| MS28775-144 PRIMARY | Sae International Dba Sae International (USA) |
| 2300-79074 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| 15361218 | Bae Systems Marine Limited (GBR) |
| Reference | Meaning |
|---|---|
| MIL-P-25732 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MS28775-144 | 5/9 Secondary reference U.S. Government activity |
| MS28775-144 | 5/9 Secondary reference U.S. Government activity |
| 40444-4 FIND NO 20 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| 2-144 N304-75 | 5/9 Secondary reference Parker Hannifin Gmbh O-Ring Division |
| 23062N PIECE 24 | C/1 Advisory reference — outside the item-of-supply concept Leslie Controls, Inc. Dba Leslie Controls Inc |
| ASC1314725 | 5/9 Secondary reference Asc Pty Ltd |
| MILP25732 | 5/9 Secondary reference U.S. Government activity |
| 2-144 N304-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| S805AP232 | 3/2 Design control — primary reference U.S. Government activity |
| 5331PL0974458 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| S805AP232 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
NSN 5331-00-618-4603 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-618-4603 has 5 manufacturer part numbers on file: PRP568-37-4067-70 (Parco, Llc), 1376-15-172 (Leonardo S.p.a. - Electronics Division - Defence Business Area), MS28775-144 (Sae International Dba Sae International), 2300-79074 (Leonardo S.p.a. - Electronics Division - Defence Business Area), 15361218 (Bae Systems Marine Limited).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-295-4186, 5331-01-325-5240. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-144: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Outside Diameter: 2.667 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN; Center Hole Diameter: 2.477 INCHES MINIMUM AND 2.497 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.