The Reducing Washer,knockout, cataloged under National Stock Number 5975-01-643-5578, is classified within Federal Supply Class 5975 (Electrical Hardware and Supplies) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Abb Installation Products Inc. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5975-01-643-5578 |
| Primary Part Number | WA 132 |
| Item Name | Reducing Washer,knockout |
| FSC / FSG | 5975 / 59 — Electrical Hardware and Supplies |
| Manufacturer | Abb Installation Products Inc |
| Status | ACTIVE |
| Knockout Size for Which Designed | 1.00 INCHES NOMINAL IN |
| Conduit Size Accommodated | 0.75 INCHES NOMINAL IN |
| Design Type | FLAT |
| Surface Treatment | ZINC |
| Material | STEEL |
| 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 |
|---|---|
| WA 132 PRIMARY | Abb Installation Products Inc (USA) |
NSN 5975-01-643-5578 is a Reducing Washer,knockout, manufactured by Abb Installation Products Inc, classified under FSC 5975, Electrical Hardware and Supplies. Status: active.
NSN 5975-01-643-5578 has 1 manufacturer part number on file: WA 132 (Abb Installation Products Inc).
Key specifications for WA 132: Overall Height: 1.75 INCHES NOMINAL IN; Knockout Size for Which Designed: 1.00 INCHES NOMINAL IN; Conduit Size Accommodated: 0.75 INCHES NOMINAL IN; Design Type: FLAT. 5 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.