The O-Ring, cataloged under National Stock Number 5331-00-809-0782, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-809-0782 |
| Primary Part Number | S8990-521P |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Cross-Sectional Height | 0.347 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.068 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN |
| Material | RUBBER |
| 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 |
|---|---|
| S8990-521P | Aero International, Llc Dba Ams Engineered Solutions (USA) |
| S8990-521P PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| S8990-521P | 5/9 Secondary reference U.S. Government activity |
| S8990-521 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-00-809-0782 is a O-Ring, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-809-0782 has 2 manufacturer part numbers on file: S8990-521P (Aero International, Llc Dba Ams Engineered Solutions), S8990-521P (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
1 possible match (shared part number, not a government interchangeability claim): 5331-00-834-1252. Verify interchangeability with system specifications before substitution.
Key specifications for S8990-521P: Cross-Sectional Height: 0.347 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN; Center Hole Diameter: 0.068 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN; Material: RUBBER. 3 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.