The O-Ring, cataloged under National Stock Number 5331-01-182-8394, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Calzoni Srl. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Calzoni Srl (CAGE A0461); Atlantic Inertial Systems Limited (CAGE U6441) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-182-8394 |
| Primary Part Number | D0551418 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Calzoni Srl |
| Status | ACTIVE |
| 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 |
|---|---|
| D0551418 | Calzoni Srl (ITA) |
| 283550-1605 | Atlantic Inertial Systems Limited (GBR) |
| Reference | Meaning |
|---|---|
| 2-270N674-70 | 5/1 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 91573398 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| WG115270 | 5/2 Secondary reference U.S. Government activity |
| MIL-G-21569B CL 1 | 4/1 Identification reference U.S. Government activity |
| AS568B-270 | 3/9 Design control — primary reference U.S. Government activity |
| 2-270 N674-70 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| M83461/1-270 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| AS568-270 B46 | 5/9 Secondary reference Hutchinson Seal Corporation |
| AS568B-270 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-01-182-8394 is a O-Ring, manufactured by Calzoni Srl, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-182-8394 has 2 manufacturer part numbers on file: D0551418 (Calzoni Srl), 283550-1605 (Atlantic Inertial Systems Limited).
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.