The Block,tackle, cataloged under National Stock Number 3940-01-499-8729, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is The Crosby Group Llc Dba the Crosby Group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3940-01-499-8729 |
| Primary Part Number | 8026046 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | The Crosby Group Llc Dba the Crosby Group |
| Status | ACTIVE |
| Attachment Style | FLATTED LOOSE SWIVEL SAFETY SNAP HOOK |
| Maximum Tackle Diameter Accommodated | 0.375 MILLIMETERS MM |
| Load Rating | 5000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 3.000 INCHES NOMINAL IN |
| Supplementary Features | SAFE WORKING LOAD: 2 TONS // PROOF TEST LOAD: 2.5 TONS // ULTIMATE STRENGTH LOAD: 4 TONS |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | SNATCH |
| Style Designator | PULLEY PATTERN |
| Locking Style | DROP LINK |
| Shell Length | 5.490 INCHES MINIMUM AND 6.250 INCHES MAXIMUM IN |
| Bearing Type | PLAIN |
| Sheave Quantity | 1 |
| Material | STEEL OVERALL |
| Material | COPPER ALLOY BEARING |
| 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 |
|---|---|
| 12378672-004 | Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA) |
| 12378672-004 | Amz Alabama Inc. (USA) |
| 8026046 PRIMARY | The Crosby Group Llc Dba the Crosby Group (USA) |
| Reference | Meaning |
|---|---|
| 12378672-004 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
| M8026046 | 5/9 Secondary reference The Crosby Group Llc Dba the Crosby Group |
| 108038 | 5/9 Secondary reference The Crosby Group Llc Dba the Crosby Group |
| 12378672 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 3940-01-499-8729 is a Block,tackle, manufactured by The Crosby Group Llc Dba the Crosby Group, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-499-8729 has 3 manufacturer part numbers on file: 12378672-004 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc), 12378672-004 (Amz Alabama Inc.), 8026046 (The Crosby Group Llc Dba the Crosby Group).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-509-5587. Verify interchangeability with system specifications before substitution.
Key specifications for 8026046: Attachment Style: FLATTED LOOSE SWIVEL SAFETY SNAP HOOK; Maximum Tackle Diameter Accommodated: 0.375 MILLIMETERS MM; Load Rating: 5000.0 POUNDS MAXIMUM LBS; Tackle Locking Device: NOT INCLUDED. 16 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.