The O-Ring, cataloged under National Stock Number 5331-00-974-8644, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Frontgrade Technologies Inc.. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-974-8644 |
| Primary Part Number | 44993WR62 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.143 INCHES NOMINAL IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM OR RUBBER BUTADIENE-STYRENE CLASS SBR OR RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR |
| 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 |
|---|---|
| 44993WR62 | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 44993WR62 | 5/9 Secondary reference U.S. Government activity |
| ES1053-1 | 3/9 Design control — primary reference Drs Sustainment Systems, Inc. |
NSN 5331-00-974-8644 is a O-Ring, manufactured by Frontgrade Technologies Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-974-8644 has 1 manufacturer part number on file: 44993WR62 (Frontgrade Technologies Inc.).
Key specifications for 44993WR62: Cross-Sectional Height: 0.143 INCHES NOMINAL IN; Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM OR RUBBER BUTADIENE-STYRENE CLASS SBR OR RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR. 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.