The Block,tackle, cataloged under National Stock Number 3940-00-641-4153, is classified within Federal Supply Class 3940 (No Item Name Available) of the Materials Handling Equipment group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-641-4153 |
| Primary Part Number | MIL-B-11837 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — No Item Name Available |
| Manufacturer | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| Status | ACTIVE |
| Nondefinitive Spec/std Data | 1 TYPE1 TYPE |
| Material | STEEL SHELLSTEEL SHELL |
| Material | COPPER ALLOY BEARINGCOPPER ALLOY BEARING |
| Material | STEEL SHEAVESTEEL SHEAVE |
| Material | STEEL CENTER PINSTEEL CENTER PIN |
| Style Designator | OVAL PATTERNOVAL PATTERN |
| Bearing Type | PLAINPLAIN |
| Locking Style | SAFETY W/LATCH PINSAFETY W/LATCH PIN |
| Load Rating | 30000.0 POUNDS MAXIMUM30000.0 POUNDS MAXIMUM LBS |
| Tackle Accommodated Type | WIRE ROPEWIRE ROPE |
| Block Type | SNATCH |
| Antitoppling Device | NOT INCLUDEDNOT INCLUDED |
| Maximum Tackle Diameter Accommodated | 0.875 INCHES0.875 INCHES IN |
| Tackle Locking Device | NOT INCLUDEDNOT INCLUDED |
| Attachment Style | OBLONG SWIVEL EYE AND SHACKLEOBLONG SWIVEL EYE AND SHACKLE |
| Sheave Bearing Lubrication Method | SELF-LUBRICATEDSELF-LUBRICATED |
| Unable to Decode | UNABLE TO DECODEUNABLE TO DECODE |
| Sheave Outside Diameter | 10.000 INCHES NOMINAL10.000 INCHES NOMINAL IN |
| Sheave Quantity | 11 |
| Center Pin Diameter | 1.500 INCHES NOMINAL1.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MIL-B-11837 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 5171 | Mcmillans W H Sons |
NSN 3940-00-641-4153 is a Block,tackle, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 3940 (No Item Name Available). Status: active.
NSN 3940-00-641-4153 has 2 cross-referenced part numbers: MIL-B-11837 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 5171 (Mcmillans W H Sons).
There are 12 known substitutes for 3940-00-641-4153: 3940-00-202-2196, 3940-00-202-2199, 3940-00-202-2200 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for MIL-B-11837: Nondefinitive Spec/std Data: 1 TYPE1 TYPE; Material: STEEL SHELLSTEEL SHELL; Material: COPPER ALLOY BEARINGCOPPER ALLOY BEARING; Material: STEEL SHEAVESTEEL SHEAVE. 20 total characteristics are documented in the Federal Logistics Information System.