The Block,tackle, cataloged under National Stock Number 3940-00-599-9990, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3940-00-599-9990 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Status | ACTIVE |
| Attachment Style | FLATTED STIFF SWIVEL SAFETY SNAP HOOKFLATTED STIFF SWIVEL SAFETY SNAP HOOK |
| Becket Type | THIMBLETHIMBLE |
| Maximum Tackle Diameter Accommodated | 0.750 INCHES0.750 INCHES IN |
| Load Rating | 20000.0 POUNDS MAXIMUM20000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDEDNOT INCLUDED |
| Sheave Outside Diameter | 14.000 INCHES NOMINAL14.000 INCHES NOMINAL IN |
| Becket Quantity | 11 |
| Tackle Accommodated Type | WIRE ROPEWIRE ROPE |
| Block Type | REGULARREGULAR |
| Style Designator | DIAMOND PATTERNDIAMOND PATTERN |
| Nondefinitive Spec/std Data | 10 SIZE10 SIZE |
| Bearing Type | BALL AND BALL AND ROLLERROLLER |
| Surface Treatment | PAINT OVERALLPAINT OVERALL |
| Sheave Quantity | 11 |
| Material | STEEL OVERALLSTEEL OVERALL |
| 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 |
|---|---|
| GGGB485 | 4/1 Identification reference U.S. Government activity |
NSN 3940-00-599-9990 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): 3940-00-599-9991. Verify interchangeability with system specifications before substitution.
Key specifications for 3940-00-599-9990: Attachment Style: FLATTED STIFF SWIVEL SAFETY SNAP HOOKFLATTED STIFF SWIVEL SAFETY SNAP HOOK; Becket Type: THIMBLETHIMBLE; Maximum Tackle Diameter Accommodated: 0.750 INCHES0.750 INCHES IN; Load Rating: 20000.0 POUNDS MAXIMUM20000.0 POUNDS MAXIMUM LBS. 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.