The Block,tackle, cataloged under National Stock Number 3940-00-877-5715, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3940-00-877-5715 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Status | ACTIVE |
| Attachment Style | OBLONG SWIVEL EYE |
| Sheave Bearing Lubrication Method | PRESSURE GREASE FITTING |
| Maximum Tackle Diameter Accommodated | 2.000 INCHES IN |
| Load Rating | 151740.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 34.000 INCHES NOMINAL IN |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | SNATCH |
| Center Pin Diameter | 4.247 INCHES MINIMUM AND 4.250 INCHES MAXIMUM IN |
| Style Designator | ROUND PATTERN |
| Unable to Decode | UNABLE TO DECODE |
| Material Document and Classification | MIL-S-890, ALLOY NO. 4 MIL SPEC SINGLE MATERIAL RESPONSE CENTER PIN |
| Locking Style | SAFETY LOCKING |
| Nondefinitive Spec/std Data | 2 GROUP |
| Shell Length | 36.250 INCHES NOMINAL IN |
| Bearing Type | PLAIN |
| Sheave Quantity | 1 |
| Material | STEEL CENTER PIN |
| Material | COPPER ALLOY BEARING |
| Antitoppling Device | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-L-28654 | 4/1 Identification reference U.S. Government activity |
| 6028259 | 5/1 Secondary reference U.S. Government activity |
NSN 3940-00-877-5715 is a Block,tackle, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3940-01-083-4224. Verify interchangeability with system specifications before substitution.
Key specifications for 3940-00-877-5715: Attachment Style: OBLONG SWIVEL EYE; Sheave Bearing Lubrication Method: PRESSURE GREASE FITTING; Maximum Tackle Diameter Accommodated: 2.000 INCHES IN; Load Rating: 151740.0 POUNDS MAXIMUM LBS. 20 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.