The O-Ring, cataloged under National Stock Number 5331-01-348-0445, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Krupp-Mak Co. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Krupp-Mak Co (CAGE 0R6X1); Mak Americas Inc (CAGE 0NMB0) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-348-0445 |
| Primary Part Number | 1 2215-2 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Krupp-Mak Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
NSN 5331-01-348-0445 is a O-Ring, manufactured by Krupp-Mak Co, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-348-0445 has 2 manufacturer part numbers on file: 1 2215-2 (Krupp-Mak Co), 1.2215-2 (Mak Americas Inc).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-581-8377. Verify interchangeability with system specifications before substitution.
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.