The Block,tackle, cataloged under National Stock Number 3940-01-431-4350, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-431-4350 |
| Primary Part Number | 6853585ITEM4 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Attachment Style | ROUND SWIVEL EYE |
| Maximum Tackle Diameter Accommodated | 40.0 MILLIMETERS MM |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 365.000 MILLIMETERS NOMINAL MM |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | REGULAR |
| Center Pin Diameter | 51.000 MILLIMETERS NOMINAL MM |
| Style Designator | STRAP AND PLATE PATTERN |
| Sheave Quantity | 1 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 6853585ITEM4 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6853584ITEM15 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 3940-01-431-4350 is a Block,tackle, manufactured by Naval Sea Systems Command, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-431-4350 has 1 manufacturer part number on file: 6853585ITEM4 (Naval Sea Systems Command).
Key specifications for 6853585ITEM4: Attachment Style: ROUND SWIVEL EYE; Maximum Tackle Diameter Accommodated: 40.0 MILLIMETERS MM; Tackle Locking Device: NOT INCLUDED; Sheave Outside Diameter: 365.000 MILLIMETERS NOMINAL MM. 11 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.