The Insulator,disk, cataloged under National Stock Number 5970-00-345-9705, 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 Kelly Manufacturing Company. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5970-00-345-9705 |
| Primary Part Number | A1057 |
| Item Name | Insulator,disk |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Kelly Manufacturing Company |
| Status | ACTIVE |
| Style Designator | FLAT, ROUND |
| Outside Diameter | 1.250 INCHES NOMINAL 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 |
|---|---|
| A1057 PRIMARY | Kelly Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| A1057 | 5/9 Secondary reference Allen R C Co Inc Cash Register Div |
| A1057 | 5/9 Secondary reference Allen R C Instruments Inc |
NSN 5970-00-345-9705 is a Insulator,disk, manufactured by Kelly Manufacturing Company, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-00-345-9705 has 1 manufacturer part number on file: A1057 (Kelly Manufacturing Company).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-023-1213. Verify interchangeability with system specifications before substitution.
Key specifications for A1057: Overall Height: 0.031 INCHES NOMINAL IN; Style Designator: FLAT, ROUND; Outside Diameter: 1.250 INCHES NOMINAL IN; Special Features: 1 EA 0.760 IN. DIA HOLE,2 EA 0.125 IN. DIA HOLES AND2 EA 0.760 IN. DIA HOLES ALL IRREGULARLY SPACED IN. 2 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.