The O-Ring, cataloged under National Stock Number 5331-01-360-0113, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-360-0113 |
| Primary Part Number | ST506Z5B |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| ST506Z5B PRIMARY | Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc (USA) |
| SD051085 NO.6 | Haywardindl. Products, Inc. (USA) |
| ST506Z5B | Haywardindl. Products, Inc. (USA) |
| ST051015BF11A-6 | Haywardindl. Products, Inc. (USA) |
NSN 5331-01-360-0113 is a O-Ring, manufactured by Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-360-0113 has 4 manufacturer part numbers on file: ST506Z5B (Hayward Industrial Products, Inc Dba Hayward Plastic Products Division Div Eaton Filtration, Llc), SD051085 NO.6 (Haywardindl. Products, Inc.), ST506Z5B (Haywardindl. Products, Inc.), ST051015BF11A-6 (Haywardindl. Products, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-573-6221. Verify interchangeability with system specifications before substitution.
Key specifications for ST506Z5B: Special Features: USED ON SEAWATER SERVICE SYSTEM; Part Name Assigned by Controlling Agency: BONNET O-RING; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.