The Insulation Sleeving,electrical, cataloged under National Stock Number 5970-01-651-5617, is classified within Federal Supply Class 5970 (Electrical Insulators and Insulating Materials) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Western Filament, Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Insulation Sleeving,electrical |
| FSC / FSG | 5970 — Electrical Insulators and Insulating Materials (FSG 59) |
| Manufacturers | Western Filament, Inc. (CAGE 00768); Techflex Inc (CAGE 0J8E6) |
| Parameter | Value |
|---|---|
| NSN | 5970-01-651-5617 |
| Primary Part Number | HRBK1250 |
| Item Name | Insulation Sleeving,electrical |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Western Filament, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HRBK1250 PRIMARY | Western Filament, Inc. (USA) |
| HTN125BK PRIMARY | Techflex Inc (USA) |
| Reference | Meaning |
|---|---|
| JSFQ21 | D/9 Drawing number reference only U.S. Government activity |
| HT6X | 5/9 Secondary reference Techflex Inc |
| 5011003203 | 3/2 Design control — primary reference U.S. Government activity |
| JSFQ21-4 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5970-01-651-5617 is a Insulation Sleeving,electrical, manufactured by Western Filament, Inc., classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-651-5617 has 2 manufacturer part numbers on file: HRBK1250 (Western Filament, Inc.), HTN125BK (Techflex Inc).
1 possible match (shared part number, not a government interchangeability claim): 5970-01-651-5619. Verify interchangeability with system specifications before substitution.
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.