The Insulator,washer, cataloged under National Stock Number 5970-01-009-2659, 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 Materion Brush Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-009-2659 |
| Primary Part Number | BBW-550-210-60 |
| Item Name | Insulator,washer |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Materion Brush Inc |
| Status | ACTIVE |
| Style Designator | ROUND, FLAT |
| Outside Diameter | 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Inside Diameter | 0.203 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN |
| Material | BERYLLIUM OXIDE 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 |
|---|---|
| BBW-550-210-60 PRIMARY | Materion Brush Inc (USA) |
| Reference | Meaning |
|---|---|
| 988049-17 | 7/2 Vendor item drawing reference U.S. Government activity |
| CG4045 | 7/2 Vendor item drawing reference American Beryllia Inc |
| CG4045 | 5/9 Secondary reference General Ceramics Inc National Beryllia Div |
NSN 5970-01-009-2659 is a Insulator,washer, manufactured by Materion Brush Inc, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-009-2659 has 1 manufacturer part number on file: BBW-550-210-60 (Materion Brush Inc).
Key specifications for BBW-550-210-60: Overall Height: 0.058 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN; Style Designator: ROUND, FLAT; Outside Diameter: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Inside Diameter: 0.203 INCHES MINIMUM AND 0.218 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.