The Block,tackle, cataloged under National Stock Number 3940-00-879-2128, is classified within Federal Supply Class 3940 (No Item Name Available) of the Materials Handling Equipment group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 3940-00-879-2128 |
| Primary Part Number | GGG-B-490 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — No Item Name Available |
| Manufacturer | Federal Specifications Promulgated by General Services Administration Washington DC |
| Status | CANCELLED |
| Antitoppling Device | NOT INCLUDED |
| Sheave Outside Diameter | 2.250 INCHES NOMINAL IN |
| Attachment Style | UPSET SCREW PIN ANCHOR SHACKLE |
| Becket Quantity | 1 |
| Material | STEEL CENTER PIN |
| Material | IRON AND STEEL SHEAVE |
| Load Rating | 1600.0 POUNDS MAXIMUM LBS |
| Material | IRON AND STEEL SHELL |
| Material | COPPER ALLOY BEARING |
| Style Designator | ROUND PATTERN |
| Sheave Quantity | 1 |
| Nondefinitive Spec/std Data | 2 TYPE |
| Bearing Type | PLAIN |
| Center Pin Diameter | 0.375 INCHES NOMINAL IN |
| Becket Type | THIMBLE |
| Shell Length | 4.000 INCHES NOMINAL IN |
| Sheave Bearing Lubrication Method | SELF-LUBRICATED |
| Unable to Decode | UNABLE TO DECODE |
| Maximum Tackle Diameter Accommodated | 0.500 INCHES IN |
| Block Type | REGULAR |
| Tackle Accommodated Type | FIBROUS ROPE |
| Tackle Locking Device | NOT INCLUDED |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| GGG-B-490 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| AA59808-11B | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| A-A59808 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
NSN 3940-00-879-2128 is a Block,tackle, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 3940 (No Item Name Available). Status: cancelled.
NSN 3940-00-879-2128 has 3 cross-referenced part numbers: GGG-B-490 (Federal Specifications Promulgated by General Services Administration Washington DC), AA59808-11B (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), A-A59808 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
There are 8 known substitutes for 3940-00-879-2128: 3940-00-059-5995, 3940-00-059-5996, 3940-00-068-9173 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for GGG-B-490: Antitoppling Device: NOT INCLUDED; Sheave Outside Diameter: 2.250 INCHES NOMINAL IN; Attachment Style: UPSET SCREW PIN ANCHOR SHACKLE; Becket Quantity: 1. 23 total characteristics are documented in the Federal Logistics Information System.
NSN 3940-00-879-2128 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.