The Block,tackle, cataloged under National Stock Number 3940-00-641-2142, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-641-2142 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Status | ACTIVE |
| Attachment Style | STIFF, UPSET SWIVEL SHACKLESTIFF, UPSET SWIVEL SHACKLE |
| Sheave Bearing Lubrication Method | SELF-LUBRICATEDSELF-LUBRICATED |
| Maximum Tackle Diameter Accommodated | 0.875 INCHES0.875 INCHES IN |
| Load Rating | 2500.0 POUNDS MAXIMUM2500.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDEDNOT INCLUDED |
| Sheave Outside Diameter | 3.375 INCHES NOMINAL3.375 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPEWIRE ROPE |
| Block Type | SNATCH |
| Center Pin Diameter | 0.679 INCHES MINIMUM AND 0.679 INCHES MINIMUM AND 0.681 INCHES MAXIMUM0.681 INCHES MAXIMUM IN |
| Style Designator | STRAP PATTERNSTRAP PATTERN |
| Locking Style | SAFETY W/LATCH PINSAFETY W/LATCH PIN |
| Bearing Type | PLAINPLAIN |
| Sheave Quantity | 11 |
| Material | ALUMINUM CENTER PINALUMINUM CENTER PIN |
| Material | ALUMINUM SHEAVEALUMINUM SHEAVE |
| Material | ALUMINUM SHELLALUMINUM SHELL |
| Material | COPPER ALLOY BEARINGCOPPER ALLOY BEARING |
| Antitoppling Device | NOT INCLUDEDNOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 7500-1437530ALTAPC1T012 | 5/2 Secondary reference U.S. Government activity |
| 7500-1437530 PC 1TO12 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3940-00-641-2142 is a Block,tackle, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
Key specifications for 3940-00-641-2142: Attachment Style: STIFF, UPSET SWIVEL SHACKLESTIFF, UPSET SWIVEL SHACKLE; Sheave Bearing Lubrication Method: SELF-LUBRICATEDSELF-LUBRICATED; Maximum Tackle Diameter Accommodated: 0.875 INCHES0.875 INCHES IN; Load Rating: 2500.0 POUNDS MAXIMUM2500.0 POUNDS MAXIMUM LBS. 18 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.