The Block,tackle, cataloged under National Stock Number 3940-01-245-7924, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-245-7924 |
| Primary Part Number | L-45-S |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | The Crosby Group Llc Dba the Crosby Group |
| Status | ACTIVE |
| Maximum Tackle Diameter Accommodated | 0.500 INCHES IN |
| Load Rating | 10000.0 POUNDS MAXIMUM LBS |
| Sheave Outside Diameter | 4.130 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | SNATCH |
| Center Pin Diameter | 1.000 INCHES NOMINAL IN |
| Style Designator | PULLEY PATTERN |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1040 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1040 ASSN STD SINGLE MATERIAL RESPONSE CENTER PIN |
| Shell Length | 9.890 INCHES NOMINAL IN |
| Sheave Quantity | 2 |
| Material | STEEL SHEAVE |
| Material | STEEL SHELL |
| Material | STEEL COMP 1040 CENTER PIN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| L-45-S PRIMARY | The Crosby Group Llc Dba the Crosby Group (USA) |
| Reference | Meaning |
|---|---|
| ST51D12-1 | 5/9 Secondary reference Lockheed Martin Corp |
NSN 3940-01-245-7924 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 3940-01-245-7924 has 1 manufacturer part number on file: L-45-S (The Crosby Group Llc Dba the Crosby Group).
Key specifications for L-45-S: Maximum Tackle Diameter Accommodated: 0.500 INCHES IN; Load Rating: 10000.0 POUNDS MAXIMUM LBS; Sheave Outside Diameter: 4.130 INCHES NOMINAL IN; Tackle Accommodated Type: WIRE ROPE. 13 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.
NSN 3940-01-245-7924 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.