The Block,tackle, cataloged under National Stock Number 3940-00-141-7248, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Anvil Industries Inc Cleveland City Forge. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-141-7248 |
| Primary Part Number | B183P4IN |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Anvil Industries Inc Cleveland City Forge |
| Status | ACTIVE |
| Attachment Style | SIDE HOOK, LOOSE |
| Maximum Tackle Diameter Accommodated | 0.500 INCHES IN |
| Load Rating | 1325.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 2.250 INCHES NOMINAL IN |
| Tackle Accommodated Type | FIBROUS ROPE |
| Center Pin Diameter | 0.375 INCHES NOMINAL IN |
| Style Designator | OVAL PATTERN |
| Unable to Decode | UNABLE TO DECODE |
| Shell Length | 4.000 INCHES NOMINAL IN |
| Bearing Type | PLAIN |
| Surface Treatment | VARNISH SHELL |
| Sheave Quantity | 3 |
| Material | STEEL SHEAVE |
| Material | WOOD SHELL |
| Material | STEEL CENTER PIN |
| Material | STEEL 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 |
| Part Number | Manufacturer |
|---|---|
| B183P4IN PRIMARY | Anvil Industries Inc Cleveland City Forge (USA) |
NSN 3940-00-141-7248 is a Block,tackle, manufactured by Anvil Industries Inc Cleveland City Forge, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-00-141-7248 has 1 manufacturer part number on file: B183P4IN (Anvil Industries Inc Cleveland City Forge).
Key specifications for B183P4IN: Attachment Style: SIDE HOOK, LOOSE; Maximum Tackle Diameter Accommodated: 0.500 INCHES IN; Load Rating: 1325.0 POUNDS MAXIMUM LBS; Tackle Locking Device: NOT INCLUDED. 18 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.