The O-Ring, cataloged under National Stock Number 5331-00-730-8328, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Proponent, Inc. Dba Proponent. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-730-8328 |
| Primary Part Number | S8316K20 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Proponent, Inc. Dba Proponent |
| Status | ACTIVE |
| Cross-Sectional Height | 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.465 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| S8316K20 | Proponent, Inc. Dba Proponent (USA) |
| S8316K20 | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| 28316K20 | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 28316K20 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| S8316K20 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| S8316K20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-00-730-8328 is a O-Ring, manufactured by Proponent, Inc. Dba Proponent, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-730-8328 has 3 manufacturer part numbers on file: S8316K20 (Proponent, Inc. Dba Proponent), S8316K20 (Honeywell International Inc. Div Aerospace - Torrance), 28316K20 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for S8316K20: Cross-Sectional Height: 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN; Center Hole Diameter: 1.465 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 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.