The O-Ring, cataloged under National Stock Number 5331-00-220-2117, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Man Diesel & Turbo Ltd. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-220-2117 |
| Primary Part Number | AL12812A |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Man Diesel & Turbo Ltd |
| Status | ACTIVE |
| Cross-Sectional Height | 0.242 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Center Hole Diameter | 10.625 INCHES MINIMUM AND 10.641 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 |
|---|---|
| AL12812A | Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment (USA) |
| AL12812A | Fairbanks Morse, Llc (USA) |
| AL12812A PRIMARY | Man Diesel & Turbo Ltd (GBR) |
| Reference | Meaning |
|---|---|
| AL12812A | 5/9 Secondary reference Paxman Diesels Ltd |
| AL12812A | 5/9 Secondary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
NSN 5331-00-220-2117 is a O-Ring, manufactured by Man Diesel & Turbo Ltd, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-220-2117 has 3 manufacturer part numbers on file: AL12812A (Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment), AL12812A (Fairbanks Morse, Llc), AL12812A (Man Diesel & Turbo Ltd).
Key specifications for AL12812A: Cross-Sectional Height: 0.242 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Center Hole Diameter: 10.625 INCHES MINIMUM AND 10.641 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.