The O-Ring, cataloged under National Stock Number 5331-01-022-8131, 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 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-022-8131 |
| Primary Part Number | MS9966-16 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Temp Rating | -67.0 FAHRENHEIT AND 347.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.112 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Outside Diameter | 1.403 INCHES NOMINAL IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 1.165 INCHES MINIMUM AND 1.177 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| 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 |
|---|---|
| MS9966-16 PRIMARY | Sae International Dba Sae International (USA) |
| 6871091-16 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS9966 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS9966-16 | 5/9 Secondary reference U.S. Government activity |
| MS9966-16 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-01-022-8131 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: cancelled.
NSN 5331-01-022-8131 has 2 manufacturer part numbers on file: MS9966-16 (Sae International Dba Sae International), 6871091-16 (Allison Transmission Inc Dba Allison Transmission, Inc).
4 possible matches (shared part number, not a government interchangeability claim): 5331-01-080-9232, 5331-01-215-5393, 5331-01-387-1231. Verify interchangeability with system specifications before substitution.
Key specifications for MS9966-16: Temp Rating: -67.0 FAHRENHEIT AND 347.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.112 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Outside Diameter: 1.403 INCHES NOMINAL IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL. 6 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 5331-01-022-8131 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.