The Block,tackle, cataloged under National Stock Number 3940-00-227-5576, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-227-5576 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Status | ACTIVE |
| Sheave Bearing Lubrication Method | SELF-LUBRICATED |
| Maximum Tackle Diameter Accommodated | 1.312 INCHES IN |
| Load Rating | 8600.0 POUNDS MAXIMUM LBS |
| Sheave Outside Diameter | 7.375 INCHES NOMINAL IN |
| Tackle Accommodated Type | FIBROUS ROPE |
| Center Pin Diameter | 0.875 INCHES NOMINAL IN |
| Style Designator | OVAL PATTERN |
| Shell Length | 12.000 INCHES NOMINAL IN |
| Bearing Type | PLAIN |
| Surface Treatment | PAINT SHELL |
| Sheave Quantity | 2 |
| Material | STEEL SHEAVE |
| Material | WOOD SHELL |
| Material | STEEL CENTER PIN |
| Reference Number Differentiating Characteristics | ELP NO.,SIZE 12 IN.,RIG NO. 4 IN |
| 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 |
|---|---|
| S1801-860405PC1T03-5T07-9T011-1- | 3/1 Design control — primary reference U.S. Government activity |
NSN 3940-00-227-5576 is a Block,tackle, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3940-00-227-5577. Verify interchangeability with system specifications before substitution.
Key specifications for 3940-00-227-5576: Sheave Bearing Lubrication Method: SELF-LUBRICATED; Maximum Tackle Diameter Accommodated: 1.312 INCHES IN; Load Rating: 8600.0 POUNDS MAXIMUM LBS; Sheave Outside Diameter: 7.375 INCHES NOMINAL IN. 15 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.