The O-Ring, cataloged under National Stock Number 5331-01-222-5581, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited (CAGE U0J60); Allied Defense Industries, Llc Dba Ams Distribution (CAGE 0GD25) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-222-5581 |
| Primary Part Number | 82401200 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 82401200 | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited (GBR) |
| 82401200 | Allied Defense Industries, Llc Dba Ams Distribution (USA) |
| Reference | Meaning |
|---|---|
| 82401200 | 5/9 Secondary reference Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| 82401200 | 5/9 Secondary reference Transaero, Inc. |
| 82401200 | 3/9 Design control — primary reference Goodrich Dba Formerly Known As Kelsey- Hayes |
NSN 5331-01-222-5581 is a O-Ring, manufactured by Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-222-5581 has 2 manufacturer part numbers on file: 82401200 (Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited), 82401200 (Allied Defense Industries, Llc Dba Ams Distribution).
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.