The O-Ring, cataloged under National Stock Number 5331-01-666-1018, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Energy Focus, Inc. Div Mmm. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Atlantic Diving Supply, Inc. Dba Ads (CAGE 1CAY9); Energy Focus, Inc. Div Mmm (CAGE 1BD15) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-666-1018 |
| Primary Part Number | 41295 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Energy Focus, Inc. Div Mmm |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 41295 | Atlantic Diving Supply, Inc. Dba Ads (USA) |
| 41295 PRIMARY | Energy Focus, Inc. Div Mmm (USA) |
| Reference | Meaning |
|---|---|
| EFO-FL11-303.4-LCS REV 1 ITEM 10 | C/1 Advisory reference — outside the item-of-supply concept Energy Focus, Inc. Div Mmm |
| EFO-FL11-303.4-LCS | D/9 Drawing number reference only Energy Focus, Inc. Div Mmm |
NSN 5331-01-666-1018 is a O-Ring, manufactured by Energy Focus, Inc. Div Mmm, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-666-1018 has 2 manufacturer part numbers on file: 41295 (Atlantic Diving Supply, Inc. Dba Ads), 41295 (Energy Focus, Inc. Div Mmm).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-671-8034. 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.