The O-Ring, cataloged under National Stock Number 5331-01-612-7631, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Eaton Filtration Llc. The record lists 2 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 | Eaton Filtration Llc (CAGE 4X3T2); Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc (CAGE 4QB42) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-612-7631 |
| Primary Part Number | ST542Z10B |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Eaton Filtration Llc |
| 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 |
|---|---|
| ST542Z10B PRIMARY | Eaton Filtration Llc (USA) |
| SD051092-224417-8IN ITEM 4 | Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc (USA) |
NSN 5331-01-612-7631 is a O-Ring, manufactured by Eaton Filtration Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-612-7631 has 2 manufacturer part numbers on file: ST542Z10B (Eaton Filtration Llc), SD051092-224417-8IN ITEM 4 (Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc).
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.