The O-Ring, cataloged under National Stock Number 5331-01-387-0557, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Parker-Hannifin Corporation Div Instrumentation Products Division (CAGE 54938); Howell Laboratories Inc Dba Howell Laboratories Inc (CAGE 22501) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-387-0557 |
| Primary Part Number | 5587-04 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories 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 |
|---|---|
| 4Q0-VI | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| 5587-04 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 1958 ITEM 2 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 4Q0-V1 | 5/9 Secondary reference Parker-Hannifin Corporation Div Instrumentation Products Division |
| 5587A-04 | 5/9 Secondary reference Howell Laboratories Inc Dba Howell Laboratories Inc |
NSN 5331-01-387-0557 is a O-Ring, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-387-0557 has 3 manufacturer part numbers on file: 4Q0-VI (Parker-Hannifin Corporation Div Instrumentation Products Division), 5587-04 (Howell Laboratories Inc Dba Howell Laboratories Inc), 1958 ITEM 2 (Howell Laboratories Inc Dba Howell Laboratories 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.