The O-Ring, cataloged under National Stock Number 5331-01-439-4077, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps). The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Army, United States Department of the Dba Watervliet Arsenal Div Business Development (CAGE 19206); Madzeal SL (CAGE 9A53B); Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps) (CAGE 30781); Alfariver Defense S.l (CAGE 9331B) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-439-4077 |
| Primary Part Number | 2-371-V747-75 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps) |
| Status | ACTIVE |
| 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 |
|---|---|
| 11580721 | Army, United States Department of the Dba Watervliet Arsenal Div Business Development (USA) |
| P-ZLAB-0050965 | Madzeal SL (ESP) |
| 2-371-V747-75 PRIMARY | Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps) (USA) |
| RE0335084 | Alfariver Defense S.l (ESP) |
NSN 5331-01-439-4077 is a O-Ring, manufactured by Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps), classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-439-4077 has 4 manufacturer part numbers on file: 11580721 (Army, United States Department of the Dba Watervliet Arsenal Div Business Development), P-ZLAB-0050965 (Madzeal SL), 2-371-V747-75 (Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps)), RE0335084 (Alfariver Defense S.l).
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.