The Block,tackle, cataloged under National Stock Number 3940-00-984-0231, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-984-0231 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Status | ACTIVE |
| Attachment Style | CHAIN SHACKLE |
| Becket Type | THIMBLE |
| Sheave Bearing Lubrication Method | SELF-LUBRICATED |
| Maximum Tackle Diameter Accommodated | 1.750 INCHES IN |
| Load Rating | 20000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 9.500 INCHES NOMINAL IN |
| Becket Quantity | 1 |
| Tackle Accommodated Type | FIBROUS ROPE |
| Block Type | REGULAR |
| Center Pin Diameter | 0.875 INCHES NOMINAL IN |
| Style Designator | HALF-OVAL PATTERN |
| Nondefinitive Spec/std Data | 2 TYPE |
| Shell Length | 14.000 INCHES NOMINAL IN |
| Bearing Type | PLAIN |
| Surface Treatment | ZINC SHEAVE |
| Surface Treatment | LACQUER AND ASPHALT SHELL |
| Sheave Quantity | 3 |
| Material | WOOD SHELL |
| Material | IRON AND STEEL SHEAVE |
| Material | STEEL CENTER PIN |
| Material | COPPER ALLOY BEARING |
| Antitoppling Device | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| GGGB00490 | 4/1 Identification reference U.S. Government activity |
NSN 3940-00-984-0231 is a Block,tackle, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
Key specifications for 3940-00-984-0231: Attachment Style: CHAIN SHACKLE; Becket Type: THIMBLE; Sheave Bearing Lubrication Method: SELF-LUBRICATED; Maximum Tackle Diameter Accommodated: 1.750 INCHES IN. 23 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.