The Block,tackle, cataloged under National Stock Number 3940-00-283-7690, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is The Crosby Group Llc Dba the Crosby Group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-00-283-7690 |
| Primary Part Number | 108065 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | The Crosby Group Llc Dba the Crosby Group |
| Status | ACTIVE |
| Attachment Style | FLATTED LOOSE SWIVEL EYE WITH SWIVEL HOOK |
| Sheave Bearing Lubrication Method | PRESSURE GREASE FITTING |
| Maximum Tackle Diameter Accommodated | 0.500 INCHES IN |
| Surface Treatment Document and Classification | DWG 80064/2584542 CLASS F,TYPE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Load Rating | 26000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Sheave Outside Diameter | 4.125 INCHES MINIMUM AND 4.375 INCHES MAXIMUM IN |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | SNATCH |
| Style Designator | OVAL PATTERN |
| Material Document and Classification | COMPOSITION C1040 ASSN STD SINGLE MATERIAL RESPONSE HOOK |
| Material Document and Classification | COMPOSITION C1040 ASSN STD SINGLE MATERIAL RESPONSE SHACKLE |
| Material Document and Classification | COMPOSITION C1040 ASSN STD SINGLE MATERIAL RESPONSE SHEAVE |
| Material Document and Classification | COMPOSITION C1040 ASSN STD SINGLE MATERIAL RESPONSE YOKE |
| Material Document and Classification | SAE 660 ASSN STD SINGLE MATERIAL RESPONSE BEARING |
| Locking Style | SAFETY LOCKING |
| Shell Length | 7.375 INCHES MINIMUM AND 7.625 INCHES MAXIMUM IN |
| Bearing Type | PLAIN |
| Surface Treatment | ENAMEL OVERALL |
| Sheave Quantity | 1 |
| Material | COPPER ALLOY 932 BEARING |
| Material | STEEL COMP 1040 HOOK |
| Material | STEEL COMP 1040 SHACKLE |
| Material | STEEL COMP 1040 SHEAVE |
| Material | STEEL COMP 1040 YOKE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 418 4 1/2 INCH | Crosby Group Inc the Mckissick Plant Div (USA) |
| 108065 PRIMARY | The Crosby Group Llc Dba the Crosby Group (USA) |
| 752-6405291-69 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 418 | 5/9 Secondary reference Crosby Group Inc the Mckissick Plant Div |
| 6405291 | D/9 Drawing number reference only Naval Sea Systems Command |
| 2624747 | 5/2 Secondary reference U.S. Government activity |
| 481 | 5/9 Secondary reference The Crosby Group Llc Dba the Crosby Group |
NSN 3940-00-283-7690 is a Block,tackle, manufactured by The Crosby Group Llc Dba the Crosby Group, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-00-283-7690 has 3 manufacturer part numbers on file: 418 4 1/2 INCH (Crosby Group Inc the Mckissick Plant Div), 108065 (The Crosby Group Llc Dba the Crosby Group), 752-6405291-69 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 5950-00-811-4810, 3940-01-524-0236. Verify interchangeability with system specifications before substitution.
Key specifications for 108065: Attachment Style: FLATTED LOOSE SWIVEL EYE WITH SWIVEL HOOK; Sheave Bearing Lubrication Method: PRESSURE GREASE FITTING; Maximum Tackle Diameter Accommodated: 0.500 INCHES IN; Surface Treatment Document and Classification: DWG 80064/2584542 CLASS F,TYPE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 26 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.