The O-Ring, cataloged under National Stock Number 5331-01-379-2274, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Lake Shore Systems, Inc.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-379-2274 |
| Primary Part Number | 0771C0027-1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.210 INCHES NOMINAL IN |
| Center Hole Diameter | 40.540 INCHES MINIMUM AND 40.900 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 0771C0027-1 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 0771C0027-1 | 5/9 Secondary reference Lake Shore Systems, Inc. |
| 0771C0027-1 | 3/2 Design control — primary reference U.S. Government activity |
| 0771C0027-1 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 5331-01-379-2274 is a O-Ring, manufactured by Lake Shore Systems, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-379-2274 has 1 manufacturer part number on file: 0771C0027-1 (Lake Shore Systems, Inc.).
Key specifications for 0771C0027-1: Cross-Sectional Height: 0.210 INCHES NOMINAL IN; Center Hole Diameter: 40.540 INCHES MINIMUM AND 40.900 INCHES MAXIMUM IN; Material: RUBBER FLUOROCARBON CLASS FPM. 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.