The O-Ring, cataloged under National Stock Number 5331-01-221-9904, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-221-9904 |
| Primary Part Number | S8057AK100 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Cross-Sectional Height | 0.103 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.343 INCHES MINIMUM AND 1.387 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| 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 |
|---|---|
| S8057AK100 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| S8057AK100 | Proponent, Inc. Dba Proponent (USA) |
| Reference | Meaning |
|---|---|
| S8057AK100 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-221-9904 is a O-Ring, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-221-9904 has 2 manufacturer part numbers on file: S8057AK100 (Honeywell International Inc. Div Aerospace - Torrance), S8057AK100 (Proponent, Inc. Dba Proponent).
Key specifications for S8057AK100: Cross-Sectional Height: 0.103 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN; Center Hole Diameter: 1.343 INCHES MINIMUM AND 1.387 INCHES MAXIMUM IN; Material: RUBBER SILICONE CLASS Q. 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.