The O-Ring, cataloged under National Stock Number 5331-01-661-9259, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Waterous Company. Government technical data includes 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-661-9259 |
| Primary Part Number | W3772-4 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Waterous Company |
| Status | ACTIVE |
| Cross-Sectional Height | 0.130 INCHES NOMINAL IN |
| Center Hole Diameter | 4.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5331-01-661-9259 is a O-Ring, manufactured by Waterous Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-661-9259 has 2 manufacturer part numbers on file: W3772-4 (Waterous Company), 4223258 (Oshkosh Defense Llc).
Key specifications for W3772-4: Cross-Sectional Height: 0.130 INCHES NOMINAL IN; Center Hole Diameter: 4.500 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: O-RING 4.5 X .125; End Item Identification: 4210-01-622-0440; TRUCK, FIRE FIGHTING. 2 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.