The O-Ring, cataloged under National Stock Number 5331-01-721-2051, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Trelleborg Sealing Solutions Us, Inc.. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-721-2051 |
| Primary Part Number | QRAR04435 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Trelleborg Sealing Solutions Us, Inc. |
| Status | ACTIVE |
| Supplementary Features | INSIDE DIAMETER, 145.42 MILLIMETERS MM |
| 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 |
|---|---|
| QRAR04435 PRIMARY | Trelleborg Sealing Solutions Us, Inc. (USA) |
NSN 5331-01-721-2051 is a O-Ring, manufactured by Trelleborg Sealing Solutions Us, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-721-2051 has 1 manufacturer part number on file: QRAR04435 (Trelleborg Sealing Solutions Us, Inc.).
Key specifications for QRAR04435: Supplementary Features: INSIDE DIAMETER, 145.42 MILLIMETERS MM; Special Features: CORD DIAMETER 6.99 MILLIMETERS MM; Part Name Assigned by Controlling Agency: QUAD-RING. 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.