The O-Ring, cataloged under National Stock Number 5331-01-542-1665, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Controlco, Inc.. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-542-1665 |
| Primary Part Number | 4VR |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Controlco, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 4VR PRIMARY | Controlco, Inc. (USA) |
| 361004 IT 235 | Mendenhall Technical Services, Inc. (USA) |
NSN 5331-01-542-1665 is a O-Ring, manufactured by Controlco, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-542-1665 has 2 manufacturer part numbers on file: 4VR (Controlco, Inc.), 361004 IT 235 (Mendenhall Technical Services, Inc.).
Key specifications for 4VR: Special Features: USED ON SSP FITTING; End Item Identification: START UNIT HYD(361004); Material: RUBBER FLUOROCARBON CLASS FPM. 1 specification is 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.