The Block,tackle, cataloged under National Stock Number 3940-01-420-0176, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3940-01-420-0176 |
| Primary Part Number | 3099T53 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Sheave Bearing Lubrication Method | SELF-LUBRICATED |
| Maximum Tackle Diameter Accommodated | 0.375 INCHES IN |
| Load Rating | 550.0 POUNDS MAXIMUM LBS |
| Coating Method | PLATED OVERALL |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 2.500 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | REGULAR |
| Style Designator | OVAL PATTERN |
| Surface Treatment | ZINC OVERALL |
| Material | PLASTIC OVERALL |
| 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 |
|---|---|
| 3099T53 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 3724T77 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
NSN 3940-01-420-0176 is a Block,tackle, manufactured by Mcmaster-Carr Supply Co, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-420-0176 has 1 manufacturer part number on file: 3099T53 (Mcmaster-Carr Supply Co).
Key specifications for 3099T53: Sheave Bearing Lubrication Method: SELF-LUBRICATED; Maximum Tackle Diameter Accommodated: 0.375 INCHES IN; Load Rating: 550.0 POUNDS MAXIMUM LBS; Coating Method: PLATED OVERALL. 11 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.