The Block,tackle, cataloged under National Stock Number 3940-01-646-3501, 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. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Block,tackle |
| FSC / FSG | 3940 — Blocks, Tackle, Rigging, and Slings (FSG 39) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 3940-01-646-3501 |
| Primary Part Number | 15608238 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| 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 |
|---|---|
| 588-7666729 AY99 | Naval Sea Systems Command (USA) |
| 15608238 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 588-7666729 | D/9 Drawing number reference only Naval Sea Systems Command |
| 588-7666729 ASSY 99 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 3940-01-646-3501 is a Block,tackle, manufactured by Naval Sea Systems Command, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-646-3501 has 2 manufacturer part numbers on file: 588-7666729 AY99 (Naval Sea Systems Command), 15608238 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3940-01-647-3105, 3940-01-648-2173. Verify interchangeability with system specifications before substitution.
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.