The Insulation Sleeving,electrical, cataloged under National Stock Number 5970-01-517-4158, 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 Aptiv Services 3 (us), Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Insulation Sleeving,electrical |
| FSC / FSG | 5970 — Electrical Insulators and Insulating Materials (FSG 59) |
| Manufacturers | Aptiv Services 3 (us), Llc (CAGE 53669); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 5970-01-517-4158 |
| Primary Part Number | C21IS16 |
| Item Name | Insulation Sleeving,electrical |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Aptiv Services 3 (us), Llc |
| 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 |
|---|---|
| C21IS16 PRIMARY | Aptiv Services 3 (us), Llc (USA) |
| 481-6985847-053 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| C21IS16 | 3/2 Design control — primary reference U.S. Government activity |
| H678-3701-053 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5970-01-517-4158 is a Insulation Sleeving,electrical, manufactured by Aptiv Services 3 (us), Llc, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-517-4158 has 2 manufacturer part numbers on file: C21IS16 (Aptiv Services 3 (us), Llc), 481-6985847-053 (Naval Sea Systems Command).
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.