The O-Ring, cataloged under National Stock Number 5331-01-363-7543, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kop-Coat Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-363-7543 |
| Primary Part Number | 10.45.103E981-50 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kop-Coat Inc |
| Status | ACTIVE |
| Temp Rating | -55.0 CELSIUS AND 100.0 CELSIUS DEGC |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM D2000 4AA520A13B33F17 ASSN STD SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 9.900 INCHES MINIMUM AND 10.100 INCHES MAXIMUM IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM |
| 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 |
|---|---|
| 10.45.103E981-50 | Kop-Coat Inc (USA) |
| Reference | Meaning |
|---|---|
| C5083338-02 | 3/9 Design control — primary reference Us Army Combat Surveillance and Target Acquisition Laboratory |
NSN 5331-01-363-7543 is a O-Ring, manufactured by Kop-Coat Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-363-7543 has 1 manufacturer part number on file: 10.45.103E981-50 (Kop-Coat Inc).
Key specifications for 10.45.103E981-50: Temp Rating: -55.0 CELSIUS AND 100.0 CELSIUS DEGC; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Material Document and Classification: ASTM D2000 4AA520A13B33F17 ASSN STD SINGLE MATERIAL RESPONSE; Center Hole Diameter: 9.900 INCHES MINIMUM AND 10.100 INCHES MAXIMUM 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.