The Insulator,bushing, cataloged under National Stock Number 5970-01-186-3944, is classified within Federal Supply Class 5970 (Electrical Insulators and Insulating Materials) of the Electrical and Electronic Equipment Components group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-186-3944 |
| Item Name | Insulator,bushing |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Status | ACTIVE |
| First Step Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Identification Code Color | NATURAL |
| Flange Thickness | 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN |
| First Counterbore Diameter | 0.812 INCHES NOMINAL IN |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| First Counterbore Depth | 0.240 INCHES NOMINAL IN |
| Second Step Diameter | 0.406 INCHES NOMINAL IN |
| Inside Diameter | 0.281 INCHES NOMINAL IN |
| First Step Height | 0.370 INCHES NOMINAL IN |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE AND GLASS FIBER OVERALL |
| Second Step Height | 0.458 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY SPECIAL FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| C-121187-51 | 3/1 Design control — primary reference U.S. Government activity |
| 121187-51 | 5/1 Secondary reference U.S. Government activity |
NSN 5970-01-186-3944 is a Insulator,bushing, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
Key specifications for 5970-01-186-3944: First Step Diameter: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN; Identification Code Color: NATURAL; Flange Thickness: 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN; First Counterbore Diameter: 0.812 INCHES NOMINAL IN. 12 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.
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.