The O-Ring, cataloged under National Stock Number 5331-00-431-9211, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-431-9211 |
| Primary Part Number | 217964 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Cross-Sectional Height | 0.089 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.333 INCHES MINIMUM AND 1.343 INCHES MAXIMUM IN |
| Material | RUBBER |
| 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 |
|---|---|
| 217964 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 217964 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 5331-00-431-9211 is a O-Ring, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-431-9211 has 1 manufacturer part number on file: 217964 (Lockheed Martin Corporation Div Rms).
2 possible matches (shared part number, not a government interchangeability claim): 2530-00-737-7892, 6650-01-485-1852. Verify interchangeability with system specifications before substitution.
Key specifications for 217964: Cross-Sectional Height: 0.089 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN; Center Hole Diameter: 1.333 INCHES MINIMUM AND 1.343 INCHES MAXIMUM IN; Material: RUBBER. 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.