The O-Ring Set, cataloged under National Stock Number 5331-01-581-2148, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is M&j Engineering. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-581-2148 |
| Primary Part Number | OK-S |
| Item Name | O-Ring Set |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | M&j Engineering |
| Status | ACTIVE |
| Component Quantity | 9 |
| Supply Items and Quantities | 1 5/16 IN BROWN O-RING, 1 7/8 IN BROWN O-RING, 1/2 IN VITRON BROWN O-RING, 1 5/16 OD POLYTETRAFLUOROETHYLENE WASHER, 1 10/32 HES STAINLESS STEEL SETSCREW, 1 FLAT HEAD SWIVEL BODY SCREW, 1 3/8 IN OD BROWN O-RING, 1 8MM OD DARK BROWN INSERT MM |
| 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 |
|---|---|
| OK-S PRIMARY | M&j Engineering (USA) |
NSN 5331-01-581-2148 is a O-Ring Set, manufactured by M&j Engineering, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-581-2148 has 1 manufacturer part number on file: OK-S (M&j Engineering).
Key specifications for OK-S: Component Quantity: 9; Supply Items and Quantities: 1 5/16 IN BROWN O-RING, 1 7/8 IN BROWN O-RING, 1/2 IN VITRON BROWN O-RING, 1 5/16 OD POLYTETRAFLUOROETHYLENE WASHER, 1 10/32 HES STAINLESS STEEL SETSCREW, 1 FLAT HEAD SWIVEL BODY SCREW, 1 3/8 IN OD BROWN O-RING, 1 8MM OD DARK BROWN INSERT MM; Part Name Assigned by Controlling Agency: OK-S STANDARD O-RING KIT. 2 specifications are 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.