The Block,tackle, cataloged under National Stock Number 3940-00-555-0603, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-555-0603 |
| Primary Part Number | 356634-1 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| Maximum Tackle Diameter Accommodated | 0.750 INCHES IN |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 13.250 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | REGULAR |
| Center Pin Diameter | 0.811 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Style Designator | HALF-STRAP PATTERN |
| Sheave Quantity | 1 |
| Material | STEEL CENTER PIN |
| Material | ALUMINUM SHELL |
| Material | ALUMINUM SHEAVE |
| 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 |
|---|---|
| 356634-1 | Tactair Fluid Controls Inc (USA) |
| 356634-1 | A and M Aerospace, Inc. (USA) |
| 356634-1 | Triumph Actuation Systems - Valencia, Inc. Dba Triumph Actuation Systems - Valencia Inc Div Triumph Actuation Systems-Val (USA) |
| 356634-1 | Equipment & Supply Inc Dba Equipment & Supply Inc (USA) |
| Reference | Meaning |
|---|---|
| 356634-1 | 5/9 Secondary reference U.S. Government activity |
| 356634-1 | 3/2 Design control — primary reference U.S. Government activity |
| 3940PL0738970 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3940-00-555-0603 is a Block,tackle, manufactured by Tactair Fluid Controls Inc, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-00-555-0603 has 4 manufacturer part numbers on file: 356634-1 (Tactair Fluid Controls Inc), 356634-1 (A and M Aerospace, Inc.), 356634-1 (Triumph Actuation Systems - Valencia, Inc. Dba Triumph Actuation Systems - Valencia Inc Div Triumph Actuation Systems-Val), 356634-1 (Equipment & Supply Inc Dba Equipment & Supply Inc).
Key specifications for 356634-1: Maximum Tackle Diameter Accommodated: 0.750 INCHES IN; Tackle Locking Device: NOT INCLUDED; Sheave Outside Diameter: 13.250 INCHES NOMINAL IN; Tackle Accommodated Type: WIRE ROPE. 12 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.