The Block,tackle, cataloged under National Stock Number 3940-01-458-5757, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Harken Inc. Government technical data includes 5 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 | 3940-01-458-5757 |
| Primary Part Number | 1571 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Harken Inc |
| Status | ACTIVE |
| Maximum Tackle Diameter Accommodated | 14.0 MILLIMETERS MM |
| Load Rating | 816.0 KILOGRAMS MAXIMUM KG |
| Bearing Type | BALL |
| Sheave Quantity | 1 |
| Material | ALUMINUM SHEAVE |
| 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 |
|---|---|
| 1571 PRIMARY | Harken Inc (USA) |
NSN 3940-01-458-5757 is a Block,tackle, manufactured by Harken Inc, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-458-5757 has 1 manufacturer part number on file: 1571 (Harken Inc).
Key specifications for 1571: Maximum Tackle Diameter Accommodated: 14.0 MILLIMETERS MM; Load Rating: 816.0 KILOGRAMS MAXIMUM KG; Bearing Type: BALL; Sheave Quantity: 1. 5 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.