The Insulation Sleeving,electrical,s, cataloged under National Stock Number 5970-00-072-7685, 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 Kirkhill, Inc. Dba Kirkhill Inc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5970-00-072-7685 |
| Primary Part Number | S12521 |
| Item Name | Insulation Sleeving,electrical,s |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Kirkhill, Inc. Dba Kirkhill Inc |
| Status | ACTIVE |
| Main Body Small End Inside Diameter | 0.281 INCHES NOMINAL AS SUPPLIED IN |
| Distance From Top of Shoulder to Small End of Main Body | 0.370 INCHES NOMINAL AS SUPPLIED IN |
| Main Body Large End Inside Diameter | 0.376 INCHES NOMINAL AS SUPPLIED IN |
| Style Designator | BOOT-STRAIGHT |
| Flexibility | SEMIRIGID |
| Main Body Overall Length | 0.680 INCHES NOMINAL AS SUPPLIED IN |
| Reliability Indicator | NOT ESTABLISHED |
| Color | BLACK |
| Distance From Bottom of Shoulder to Large End of Main Body | 0.310 INCHES NOMINAL AS SUPPLIED IN |
| Material | RUBBER SYNTHETIC LOCATION NOT OTHERWISE SPECIFIED |
| Main Body Wall Thickness | 0.030 INCHES NOMINAL AS SUPPLIED IN |
| 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 |
|---|---|
| S12521 PRIMARY | Kirkhill, Inc. Dba Kirkhill Inc (USA) |
| Reference | Meaning |
|---|---|
| 421-0253-001 | 5/2 Secondary reference U.S. Government activity |
| 948184-506 | 5/2 Secondary reference U.S. Government activity |
NSN 5970-00-072-7685 is a Insulation Sleeving,electrical,s, manufactured by Kirkhill, Inc. Dba Kirkhill Inc, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-00-072-7685 has 1 manufacturer part number on file: S12521 (Kirkhill, Inc. Dba Kirkhill Inc).
1 possible match (shared part number, not a government interchangeability claim): 6625-00-133-7702. Verify interchangeability with system specifications before substitution.
Key specifications for S12521: Main Body Small End Inside Diameter: 0.281 INCHES NOMINAL AS SUPPLIED IN; Distance From Top of Shoulder to Small End of Main Body: 0.370 INCHES NOMINAL AS SUPPLIED IN; Main Body Large End Inside Diameter: 0.376 INCHES NOMINAL AS SUPPLIED IN; Style Designator: BOOT-STRAIGHT. 11 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.