The Block,tackle, cataloged under National Stock Number 3940-01-485-6201, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-485-6201 |
| Primary Part Number | 580-6641123-0489 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Maximum Tackle Diameter Accommodated | 3.500 INCHES IN |
| Load Rating | 7800.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Tackle Accommodated Type | FIBROUS ROPE |
| Block Type | REGULAR |
| Center Pin Diameter | 1.503 INCHES NOMINAL IN |
| Style Designator | TROLLEY PATTERN |
| Unable to Decode | UNABLE TO DECODE |
| Sheave Quantity | 1 |
| 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 |
|---|---|
| 580-6641123-0489 PRIMARY | Naval Sea Systems Command (USA) |
| 580-6641123-ECHG-A90 | Naval Sea Systems Command (USA) |
| 6921603-A90 | Naval Sea Systems Command (USA) |
NSN 3940-01-485-6201 is a Block,tackle, manufactured by Naval Sea Systems Command, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-485-6201 has 3 manufacturer part numbers on file: 580-6641123-0489 (Naval Sea Systems Command), 580-6641123-ECHG-A90 (Naval Sea Systems Command), 6921603-A90 (Naval Sea Systems Command).
Key specifications for 580-6641123-0489: Maximum Tackle Diameter Accommodated: 3.500 INCHES IN; Load Rating: 7800.0 POUNDS MAXIMUM LBS; Tackle Locking Device: NOT INCLUDED; Tackle Accommodated Type: FIBROUS ROPE. 10 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.