The Insulator,bushing, cataloged under National Stock Number 5970-01-367-2999, 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 Mayday Manufacturing Co.. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-367-2999 |
| Primary Part Number | 04A081-03A138 |
| Item Name | Insulator,bushing |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Mayday Manufacturing Co. |
| Status | ACTIVE |
| Style Designator | CYLINDRICAL |
| Outside Diameter | 0.319 INCHES NOMINAL IN |
| Inside Diameter | 0.191 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| End Configuration | BOTH ENDS SQUARED |
| 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 |
|---|---|
| 04A081-03A138 PRIMARY | Mayday Manufacturing Co. (USA) |
| 04A081-03A138 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| 04A081-03A138 | Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA) |
| Reference | Meaning |
|---|---|
| 04A081 | D/9 Drawing number reference only Defense Logistics Agency Dba Defense Supply Center Philadelphia |
| A551-30-03A138 | 5/9 Secondary reference U.S. Government activity |
NSN 5970-01-367-2999 is a Insulator,bushing, manufactured by Mayday Manufacturing Co., classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-367-2999 has 3 manufacturer part numbers on file: 04A081-03A138 (Mayday Manufacturing Co.), 04A081-03A138 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), 04A081-03A138 (Defense Logistics Agency Dba Defense Supply Center Philadelphia).
3 possible matches (shared part number, not a government interchangeability claim): 5970-01-367-3025, 5970-01-367-4361, 5970-01-526-2954. Verify interchangeability with system specifications before substitution.
Key specifications for 04A081-03A138: Overall Height: 2.156 INCHES NOMINAL IN; Style Designator: CYLINDRICAL; Outside Diameter: 0.319 INCHES NOMINAL IN; Inside Diameter: 0.191 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN. 4 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.