The Insulator,washer, cataloged under National Stock Number 5970-01-179-8780, is classified within Federal Supply Class 5970 (Electrical Insulators and Insulating Materials) of the Electrical and Electronic Equipment Components group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5970-01-179-8780 |
| Item Name | Insulator,washer |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Style Designator | ROUND, FLAT |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Inside Diameter | 0.255 INCHES NOMINAL IN |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 120819 | 5/1 Secondary reference U.S. Government activity |
| 129003-58 | 5/1 Secondary reference U.S. Government activity |
| 127012PC187 | 5/1 Secondary reference U.S. Government activity |
| 127011PC196 | 5/1 Secondary reference U.S. Government activity |
| 120819-3 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5970-01-179-8780 is a Insulator,washer, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5220-01-359-3001. Verify interchangeability with system specifications before substitution.
Key specifications for 5970-01-179-8780: Overall Height: 0.002 INCHES NOMINAL IN; Criticality Code Justification: ZZZY; Style Designator: ROUND, FLAT; Outside Diameter: 1.000 INCHES NOMINAL IN. 5 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5970-01-179-8780 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.