The Locking Device,circuit Breaker, cataloged under National Stock Number 5925-01-570-3236, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Master Lock Company Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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 | 5925-01-570-3236 |
| Primary Part Number | 491B |
| Item Name | Locking Device,circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Master Lock Company Llc |
| Status | ACTIVE |
| 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 |
NSN 5925-01-570-3236 is a Locking Device,circuit Breaker, manufactured by Master Lock Company Llc, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-570-3236 has 4 manufacturer part numbers on file: 491B (Master Lock Company Llc), 0652 3349 (Blackwood J. Blackwood & Son Pty Ltd), 491B (Master Lock Europe), 491B (Hartac Sales & Distribution Pty Ltd).
1 possible match (shared part number, not a government interchangeability claim): 6515-01-630-8955. Verify interchangeability with system specifications before substitution.
Key specifications for 491B: Special Features: FOR TALL AND WIDE TOGGLES; NARROW PROFILE; POWDER COATED; Material: STEEL. 1 specification is 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.