The Block,tackle, cataloged under National Stock Number 3940-01-643-0406, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Cmc Rescue, Inc.. Government technical data includes 2 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. 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 | 3940-01-643-0406 |
| Primary Part Number | 300430 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Cmc Rescue, Inc. |
| Status | ACTIVE |
| Block Type | REGULAR |
| Material | STEEL CORROSION RESISTING SHEAVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 300430 PRIMARY | Cmc Rescue, Inc. (USA) |
NSN 3940-01-643-0406 is a Block,tackle, manufactured by Cmc Rescue, Inc., classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-643-0406 has 1 manufacturer part number on file: 300430 (Cmc Rescue, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-659-2505. Verify interchangeability with system specifications before substitution.
Key specifications for 300430: Block Type: REGULAR; Special Features: SHEAVE TREAD 1.5 X .5 IN, BRONZE/SLATE, 3 SIGMA MBS 45 KN, WGHT. 11.3 OZ OZ; Part Name Assigned by Controlling Agency: PMP SWIVEL PULLEY; Material: STEEL CORROSION RESISTING SHEAVE. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.