The Insulator,bushing, cataloged under National Stock Number 5970-00-448-4273, 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 Grimes Aerospace Company. Government technical data includes 7 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 | 5970-00-448-4273 |
| Primary Part Number | A5221 |
| Item Name | Insulator,bushing |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Shank Height | 0.120 INCHES MINIMUM AND 0.124 INCHES MAXIMUM IN |
| Style Designator | SHOULDER |
| Material Document and Classification | DELRIN 500, E I DUPONT DE NEMOURS AND CO INC MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.375 INCHES NOMINAL IN |
| Shank Outside Diameter | 0.215 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN |
| Inside Diameter | 0.1405 INCHES NOMINAL IN |
| Material | POLYOXYMETHYLENE, ACETAL HOMOPOLYMER (POM-H) 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 |
|---|---|
| A5221 PRIMARY | Grimes Aerospace Company (USA) |
NSN 5970-00-448-4273 is a Insulator,bushing, manufactured by Grimes Aerospace Company, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-00-448-4273 has 1 manufacturer part number on file: A5221 (Grimes Aerospace Company).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-098-6954. Verify interchangeability with system specifications before substitution.
Key specifications for A5221: Overall Height: 0.265 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN; Shank Height: 0.120 INCHES MINIMUM AND 0.124 INCHES MAXIMUM IN; Style Designator: SHOULDER; Material Document and Classification: DELRIN 500, E I DUPONT DE NEMOURS AND CO INC MFR REF SINGLE MATERIAL RESPONSE OVERALL. 7 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.