The Block,tackle, cataloged under National Stock Number 3940-00-189-3490, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-189-3490 |
| Primary Part Number | G-954-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 |
| Sheave Bearing Lubrication Method | SELF-LUBRICATED |
| Load Rating | 4000.0 POUNDS MAXIMUM LBS |
| Sheave Outside Diameter | 6.000 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | REGULAR |
| Center Pin Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | OVAL PATTERN |
| Bearing Type | PLAIN |
| Sheave Quantity | 1 |
| Material | STEEL SHEAVE |
| Material | STEEL CENTER PIN |
| Material | COPPER ALLOY BEARING |
| Material | IRON SHELL |
| 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 |
|---|---|
| G-954-S | The Crosby Group Llc Dba the Crosby Group (USA) |
| Reference | Meaning |
|---|---|
| 4801-Q | 5/9 Secondary reference Apex Tool Group, Llc |
| 5173-3-8-1-2 | 5/9 Secondary reference Mcmillans W H Sons |
| 4801-Q | 3/9 Design control — primary reference U.S. Government activity |
NSN 3940-00-189-3490 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 3940-00-189-3490 has 1 manufacturer part number on file: G-954-S (The Crosby Group Llc Dba the Crosby Group).
Key specifications for G-954-S: Sheave Bearing Lubrication Method: SELF-LUBRICATED; Load Rating: 4000.0 POUNDS MAXIMUM LBS; Sheave Outside Diameter: 6.000 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.
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.