The Block,tackle, cataloged under National Stock Number 3940-00-630-9931, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-630-9931 |
| Primary Part Number | D8337019PT8337020 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Attachment Style | FLATTED STIFF SWIVEL HOOKFLATTED STIFF SWIVEL HOOK |
| Maximum Tackle Diameter Accommodated | 0.625 INCHES0.625 INCHES IN |
| Load Rating | 20000.0 POUNDS MAXIMUM20000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDEDNOT INCLUDED |
| Sheave Outside Diameter | 8.000 INCHES NOMINAL8.000 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPEWIRE ROPE |
| Block Type | SNATCH |
| Center Pin Diameter | 1.500 INCHES NOMINAL1.500 INCHES NOMINAL IN |
| Style Designator | HALF-OVAL PATTERNHALF-OVAL PATTERN |
| Locking Style | DROP LINKDROP LINK |
| Nondefinitive Spec/std Data | 2 TYPE2 TYPE |
| Bearing Type | PLAINPLAIN |
| Surface Treatment | ZINC OVERALLZINC OVERALL |
| Sheave Quantity | 11 |
| Material | STEEL SHELLSTEEL SHELL |
| Material | COPPER ALLOY 511 BEARINGCOPPER ALLOY 511 BEARING |
| Material | STEEL CENTER PINSTEEL CENTER PIN |
| Material | STEEL SHEAVESTEEL SHEAVE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| D8337019PT8337020 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| MILB11837TYPE2STYLEA | 4/1 Identification reference U.S. Government activity |
NSN 3940-00-630-9931 is a Block,tackle, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-00-630-9931 has 1 manufacturer part number on file: D8337019PT8337020 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for D8337019PT8337020: Attachment Style: FLATTED STIFF SWIVEL HOOKFLATTED STIFF SWIVEL HOOK; Maximum Tackle Diameter Accommodated: 0.625 INCHES0.625 INCHES IN; Load Rating: 20000.0 POUNDS MAXIMUM20000.0 POUNDS MAXIMUM LBS; Tackle Locking Device: NOT INCLUDEDNOT INCLUDED. 19 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.