The O-Ring, cataloged under National Stock Number 5331-01-476-7678, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5331-01-476-7678 |
| Primary Part Number | 20A11XMS1031 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Cross-Sectional Height | 0.250 INCHES NOMINAL IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Material Document and Classification | MIL-R-83248,TY 1,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 31.000 INCHES NOMINAL 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 |
|---|---|
| 20A11XMS1031 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 20A11XMS1031 | 3/9 Design control — primary reference U.S. Government activity |
| PL14006N18ITEM456B | 5/9 Secondary reference U.S. Government activity |
| PL14006N18ITEM456B | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Div Epd |
NSN 5331-01-476-7678 is a O-Ring, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-476-7678 has 1 manufacturer part number on file: 20A11XMS1031 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 20A11XMS1031: Cross-Sectional Height: 0.250 INCHES NOMINAL IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Material Document and Classification: MIL-R-83248,TY 1,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE; Center Hole Diameter: 31.000 INCHES NOMINAL IN. 5 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.