The Insulator,bushing, cataloged under National Stock Number 5970-01-157-7657, is classified within Federal Supply Class 5970 (Electrical Insulators and Insulating Materials) of the Electrical and Electronic Equipment Components group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5970-01-157-7657 |
| Item Name | Insulator,bushing |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Status | ACTIVE |
| Identification Code Color | NATURAL |
| First Counterbore Diameter | 0.562 INCHES NOMINAL IN |
| Style Designator | CYLINDRICAL |
| Outside Diameter | 0.625 INCHES NOMINAL IN |
| First Counterbore Depth | 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Inside Diameter | 0.281 INCHES NOMINAL IN |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE AND GLASS FIBER OVERALL |
| 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 |
|---|---|
| 113788-6 | 5/1 Secondary reference U.S. Government activity |
| C-113788-6 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5970-01-157-7657 is a Insulator,bushing, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6515-01-622-9571. Verify interchangeability with system specifications before substitution.
Key specifications for 5970-01-157-7657: Overall Height: 0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN; Identification Code Color: NATURAL; First Counterbore Diameter: 0.562 INCHES NOMINAL IN; Style Designator: CYLINDRICAL. 8 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.