The Block,tackle, cataloged under National Stock Number 3940-00-891-2172, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-891-2172 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Status | ACTIVE |
| Maximum Tackle Diameter Accommodated | 1.000 INCHES IN |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 10.000 INCHES NOMINAL IN |
| Block Type | REGULAR |
| Center Pin Diameter | 0.874 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Style Designator | HALF-STRAP PATTERN |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 3140 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 3140 ASSN STD SINGLE MATERIAL RESPONSE CENTER PIN |
| Sheave Quantity | 1 |
| Material | STEEL COMP 3140 CENTER PIN |
| 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 |
| Reference | Meaning |
|---|---|
| 341N400-501-105 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3940-00-891-2172 is a Block,tackle, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
Key specifications for 3940-00-891-2172: Maximum Tackle Diameter Accommodated: 1.000 INCHES IN; Tackle Locking Device: NOT INCLUDED; Sheave Outside Diameter: 10.000 INCHES NOMINAL IN; Block Type: REGULAR. 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.