The Insulation Sleeving,electrical, cataloged under National Stock Number 5970-01-265-5072, 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 Markel Corp.. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-265-5072 |
| Primary Part Number | HT55YSW000 |
| Item Name | Insulation Sleeving,electrical |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Markel Corp. |
| Status | ACTIVE |
| Temp Rating | -10.0 CELSIUS AND 105.0 CELSIUS DEGC |
| Style Designator | NONSHRINKABLE |
| Flexibility | FLEXIBLE |
| Wall Thickness | 0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 CATEGORY AND 1 CLASS AND U FORM AND C GRADE AND 3/8 IN. SIZE AND UA SUBFORM AND F TYPE IN |
| Inside Diameter | 0.375 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN |
| Dielectric Material Voltage Rating Per Unit Thickness | 630.0 VOLTS PER MIL /0.001 INCH/ IN |
| Reliability Indicator | NOT ESTABLISHED |
| Color | YELLOW |
| Environmental Protection | FLAME RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT |
| Minimum Tensile Strength | 1800 POUNDS PER SQUARE INCH LBS |
| Material | PLASTIC |
| 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 |
|---|---|
| HT55YSW000 PRIMARY | Markel Corp. (USA) |
| SIZE 3/8 YELLOW SYNTHOLVAR SHH PRIMARY | Varflex Corporation Dba Varflex Corp (USA) |
| 4900-AWG 3/8-YELLOW PRIMARY | Insultab Inc Div Pexco Athol (USA) |
| Reference | Meaning |
|---|---|
| MIL-I-631 | 4/1 Identification reference U.S. Government activity |
| 2200271-200 | 5/2 Secondary reference U.S. Government activity |
| 800000375051 | 5/9 Secondary reference U.S. Government activity |
NSN 5970-01-265-5072 is a Insulation Sleeving,electrical, manufactured by Markel Corp., classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-265-5072 has 3 manufacturer part numbers on file: HT55YSW000 (Markel Corp.), SIZE 3/8 YELLOW SYNTHOLVAR SHH (Varflex Corporation Dba Varflex Corp), 4900-AWG 3/8-YELLOW (Insultab Inc Div Pexco Athol).
Key specifications for HT55YSW000: Temp Rating: -10.0 CELSIUS AND 105.0 CELSIUS DEGC; Style Designator: NONSHRINKABLE; Flexibility: FLEXIBLE; Wall Thickness: 0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM 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.