The O-Ring, cataloged under National Stock Number 5331-01-188-9420, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Haywardindl. Products, Inc.. 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 | Haywardindl. Products, Inc. (CAGE 73124) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-188-9420 |
| Primary Part Number | ST506-Z-5B AND ST506-Z-6B |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Haywardindl. Products, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| ST509-0250F-1-AMIL PIECE 18 | Haywardindl. Products, Inc. (USA) |
| ST506-Z-5B AND ST506-Z-6B PRIMARY | Haywardindl. Products, Inc. (USA) |
NSN 5331-01-188-9420 is a O-Ring, manufactured by Haywardindl. Products, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-188-9420 has 2 manufacturer part numbers on file: ST509-0250F-1-AMIL PIECE 18 (Haywardindl. Products, Inc.), ST506-Z-5B AND ST506-Z-6B (Haywardindl. Products, Inc.).
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.