The O-Ring, cataloged under National Stock Number 5331-01-565-5023, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Miller Electric Mfg. Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-565-5023 |
| Primary Part Number | 166 566 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Miller Electric Mfg. Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.070 INCHES NOMINAL IN |
| Center Hole Diameter | 1.301 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 166 566 PRIMARY | Miller Electric Mfg. Llc (USA) |
| Reference | Meaning |
|---|---|
| 166 566 | 3/9 Design control — primary reference Miller Electric Mfg. Co. |
NSN 5331-01-565-5023 is a O-Ring, manufactured by Miller Electric Mfg. Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-565-5023 has 1 manufacturer part number on file: 166 566 (Miller Electric Mfg. Llc).
Key specifications for 166 566: Cross-Sectional Height: 0.070 INCHES NOMINAL IN; Center Hole Diameter: 1.301 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: FLOW INDICATOR LENS O-RING; End Item Identification: COOLMATE 3 MODELS 43007 AND 043008. 3 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.