The O-Ring, cataloged under National Stock Number 5331-01-686-6840, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company Div Corp. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-686-6840 |
| Primary Part Number | H313523-1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Raytheon Company Div Corp |
| Status | ACTIVE |
| Cross-Sectional Height | 0.156 INCHES NOMINAL IN |
| Hardness Rating | 55.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 7.25 INCHES MINIMUM AND 7.45 INCHES MAXIMUM IN |
| Material | RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM |
| 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 |
|---|---|
| H313523-1 PRIMARY | Raytheon Company Div Corp (USA) |
| Reference | Meaning |
|---|---|
| H313523 | D/9 Drawing number reference only Raytheon Company Div Corp |
NSN 5331-01-686-6840 is a O-Ring, manufactured by Raytheon Company Div Corp, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-686-6840 has 1 manufacturer part number on file: H313523-1 (Raytheon Company Div Corp).
Key specifications for H313523-1: Cross-Sectional Height: 0.156 INCHES NOMINAL IN; Hardness Rating: 55.0 SHORE DUROMETER A NOMINAL; Special Features: MANUFACTURING PROCCESS EXTRUDED; Center Hole Diameter: 7.25 INCHES MINIMUM AND 7.45 INCHES MAXIMUM IN. 4 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.