The Insulator,disk, cataloged under National Stock Number 5970-01-092-1573, 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 Northrop Grumman Support Services Corp. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-092-1573 |
| Primary Part Number | 121B290H01 |
| Item Name | Insulator,disk |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| First Hole Diameter | 0.238 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Style Designator | DRILLED, FLAT |
| Material Document and Classification | MIL-P-19468, GROUP B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.810 INCHES NOMINAL IN |
| Second Hole Spacing | 0.560 INCHES NOMINAL IN |
| Second Hole Diameter | 0.084 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN |
| First Hole Spacing | 0.280 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE 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 |
|---|---|
| 121B290H01 | Spencer Industries Inc (USA) |
| 121B290H01 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 121B290H01 | 3/9 Design control — primary reference U.S. Government activity |
| 121B290 | 5/1 Secondary reference U.S. Government activity |
NSN 5970-01-092-1573 is a Insulator,disk, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-092-1573 has 2 manufacturer part numbers on file: 121B290H01 (Spencer Industries Inc), 121B290H01 (Northrop Grumman Support Services Corp).
Key specifications for 121B290H01: Overall Height: 0.184 INCHES NOMINAL IN; First Hole Diameter: 0.238 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Style Designator: DRILLED, FLAT; Material Document and Classification: MIL-P-19468, GROUP B 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.