The Insulator,washer, cataloged under National Stock Number 5970-01-219-8428, 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 Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit. Government technical data includes 6 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 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 | 5970-01-219-8428 |
| Primary Part Number | 31761-3 |
| Item Name | Insulator,washer |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit |
| Status | ACTIVE |
| Style Designator | ROUND, FLAT |
| Material Document and Classification | MIL-P-13949 MIL SPEC 1ST MATERIAL RESPONSE OR FL-GE,GRADE FR4,TRANSISTOR DEVICES INC ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.500 INCHES NOMINAL IN |
| Inside Diameter | 0.125 INCHES NOMINAL IN |
| Material | STA000 AND COPPER AND RESIN EPOXY AND GLASS FIBER OVERALL |
| Fabrication Method | LAMINATED AND FIBER GLASS, WOVEN AND CLAD, METAL |
| 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 |
|---|---|
| 31761-3 PRIMARY | Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA) |
NSN 5970-01-219-8428 is a Insulator,washer, manufactured by Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-219-8428 has 1 manufacturer part number on file: 31761-3 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-682-1201. Verify interchangeability with system specifications before substitution.
Key specifications for 31761-3: Overall Height: 0.015 INCHES NOMINAL IN; Style Designator: ROUND, FLAT; Material Document and Classification: MIL-P-13949 MIL SPEC 1ST MATERIAL RESPONSE OR FL-GE,GRADE FR4,TRANSISTOR DEVICES INC ASSN STD 2ND MATERIAL RESPONSE OVERALL; Outside Diameter: 1.500 INCHES NOMINAL IN. 6 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.