The Block,tackle, cataloged under National Stock Number 3940-01-653-2051, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is The Crosby Group Llc Dba the Crosby Group. Government technical data includes 6 specifications, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-653-2051 |
| Primary Part Number | 179238 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | The Crosby Group Llc Dba the Crosby Group |
| Status | ACTIVE |
| Sheave Outside Diameter | 152.0 MILLIMETERS NOMINAL MM |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | SNATCH |
| Style Designator | PULLEY PATTERN |
| Material Document and Classification | MIL-S-890, ALLOY NO. 4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 1382A10052-9 | Babcock International Group Plc (GBR) |
| 1382L10023 ITEM 9 | Babcock International Group Plc (GBR) |
| 179238 PRIMARY | The Crosby Group Llc Dba the Crosby Group (USA) |
| 40044354 | Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt) (GBR) |
NSN 3940-01-653-2051 is a Block,tackle, manufactured by The Crosby Group Llc Dba the Crosby Group, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-653-2051 has 4 manufacturer part numbers on file: 1382A10052-9 (Babcock International Group Plc), 1382L10023 ITEM 9 (Babcock International Group Plc), 179238 (The Crosby Group Llc Dba the Crosby Group), 40044354 (Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt)).
Key specifications for 179238: Sheave Outside Diameter: 152.0 MILLIMETERS NOMINAL MM; Tackle Accommodated Type: WIRE ROPE; Block Type: SNATCH; Style Designator: PULLEY PATTERN. 6 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.