The Block,tackle, cataloged under National Stock Number 3940-00-630-9932, 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 18 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 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 | 3940-00-630-9932 |
| Primary Part Number | 8337021 |
| 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 | OBLONG SWIVEL EYE AND SHACKLEOBLONG SWIVEL EYE AND SHACKLE |
| Maximum Tackle Diameter Accommodated | 0.750 INCHES0.750 INCHES IN |
| Load Rating | 30000.0 POUNDS MAXIMUM30000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDEDNOT INCLUDED |
| Sheave Outside Diameter | 10.000 INCHES NOMINAL10.000 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPEWIRE ROPE |
| Block Type | SNATCH |
| Center Pin Diameter | 1.750 INCHES NOMINAL1.750 INCHES NOMINAL IN |
| Style Designator | HALF-OVAL PATTERNHALF-OVAL PATTERN |
| Locking Style | SAFETY LOCKINGSAFETY LOCKING |
| Nondefinitive Spec/std Data | 2 TYPE2 TYPE |
| Bearing Type | PLAINPLAIN |
| 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 |
|---|---|
| 8337021 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3940-00-630-9932 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 3940-00-630-9932 has 1 manufacturer part number on file: 8337021 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-203-2647. Verify interchangeability with system specifications before substitution.
Key specifications for 8337021: Attachment Style: OBLONG SWIVEL EYE AND SHACKLEOBLONG SWIVEL EYE AND SHACKLE; Maximum Tackle Diameter Accommodated: 0.750 INCHES0.750 INCHES IN; Load Rating: 30000.0 POUNDS MAXIMUM30000.0 POUNDS MAXIMUM LBS; Tackle Locking Device: NOT INCLUDEDNOT INCLUDED. 18 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.