The O-Ring, cataloged under National Stock Number 5331-01-363-4120, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-363-4120 |
| Primary Part Number | 179800 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Peripheral Diameter | 0.109 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.065 INCHES MINIMUM AND 0.075 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 |
|---|---|
| KADAC-011277 | Kalrez Usa, Llc (USA) |
| 179800 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 179800 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-363-4120 is a O-Ring, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-363-4120 has 2 manufacturer part numbers on file: KADAC-011277 (Kalrez Usa, Llc), 179800 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 179800: Criticality Code Justification: FEAT; Peripheral Diameter: 0.109 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN; Special Features: NSN IS A FLIGHT SAFETY CRITICAL AVIATION PART (CRITICAL SAFETY ITEM / CSI); Center Hole Diameter: 0.065 INCHES MINIMUM AND 0.075 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.