The Block,tackle, cataloged under National Stock Number 3940-01-489-1464, 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 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-489-1464 |
| Primary Part Number | 581-6726890-AY98 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Block Type | REGULAR |
| Style Designator | OVAL PATTERN |
| Shell Length | 61.750 INCHES NOMINAL IN |
| Functional Description | AFT COMPLIANT SHEAVE ASSY |
| Sheave Quantity | 2 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 14901338 | Naval Sea Systems Command (USA) |
| 581-6726890-AY98 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6726890 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3940-01-489-1464 is a Block,tackle, manufactured by Naval Sea Systems Command, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-489-1464 has 2 manufacturer part numbers on file: 14901338 (Naval Sea Systems Command), 581-6726890-AY98 (Naval Sea Systems Command).
Key specifications for 581-6726890-AY98: Block Type: REGULAR; Style Designator: OVAL PATTERN; Shell Length: 61.750 INCHES NOMINAL IN; Functional Description: AFT COMPLIANT SHEAVE ASSY. 6 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.
NSN 3940-01-489-1464 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.