The O-Ring, cataloged under National Stock Number 5331-01-646-9526, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Mc Masters Koss Co. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-646-9526 |
| Primary Part Number | 2418T12 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Mc Masters Koss Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5331-01-646-9526 is a O-Ring, manufactured by Mc Masters Koss Co, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-646-9526 has 2 manufacturer part numbers on file: 2418T12 (Mc Masters Koss Co), 2418T12 (Mcmaster-Carr Supply Company).
Key specifications for 2418T12: Special Features: PART MANUFACTURED BY MCMASTERS KOSS CO. CAGE: 5W104; Part Name Assigned by Controlling Agency: OPTICAL BENCH O-RING; End Item Identification: 6545-01-600-3232. 0 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.