The Insulator,bushing, cataloged under National Stock Number 5970-01-138-4048, 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 Fm Af, Llc Dba American Fan Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-138-4048 |
| Primary Part Number | 1387876 |
| Item Name | Insulator,bushing |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Fm Af, Llc Dba American Fan Company |
| Status | ACTIVE |
| Countersink Angle in Deg | 45.0 |
| Shank Height | 0.250 INCHES NOMINAL IN |
| Material Document and Classification | MIL-P-15035, TYPE FBG MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 5.250 INCHES NOMINAL IN |
| Shank Outside Diameter | 3.247 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN |
| Inside Diameter | 3.001 INCHES MINIMUM AND 3.005 INCHES MAXIMUM IN |
| Mounting Bolt Circle Diameter | 4.000 INCHES NOMINAL IN |
| Material | PLASTIC PHENOLIC AND COTTON OVERALL |
| 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 |
|---|---|
| 1387876 PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
| Reference | Meaning |
|---|---|
| 5970PL0922217 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5970-01-138-4048 is a Insulator,bushing, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-138-4048 has 1 manufacturer part number on file: 1387876 (Fm Af, Llc Dba American Fan Company).
Key specifications for 1387876: Overall Height: 0.375 INCHES NOMINAL IN; Countersink Angle in Deg: 45.0; Shank Height: 0.250 INCHES NOMINAL IN; Material Document and Classification: MIL-P-15035, TYPE FBG MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.