The Block,tackle, cataloged under National Stock Number 3940-01-491-0507, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Crosby Group Inc the Mckissick Plant Div. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-491-0507 |
| Primary Part Number | M903268L |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Crosby Group Inc the Mckissick Plant Div |
| Status | ACTIVE |
| Attachment Style | DRILLED SWIVEL EYE AND SHACKLE |
| Becket Type | ROUND EYE |
| Sheave Bearing Lubrication Method | SELF-LUBRICATED |
| Load Rating | 20000.0 POUNDS MAXIMUM LBS |
| Tackle Locking Device | NOT INCLUDED |
| Becket Quantity | 1 |
| Block Type | SNATCH |
| Style Designator | OVAL PATTERN WITH ROPE GUARDS |
| Locking Style | DROP LINK |
| Shell Length | 12.310 INCHES NOMINAL IN |
| Bearing Type | PLAIN |
| Surface Treatment | ZINC OVERALL |
| Sheave Quantity | 1 |
| Material | STEEL 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 |
|---|---|
| 8004328 | Crosby Group Inc the Mckissick Plant Div (USA) |
| 571-6580814 ITEM 21 | Naval Sea Systems Command (USA) |
| M903268L PRIMARY | Crosby Group Inc the Mckissick Plant Div (USA) |
NSN 3940-01-491-0507 is a Block,tackle, manufactured by Crosby Group Inc the Mckissick Plant Div, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-491-0507 has 3 manufacturer part numbers on file: 8004328 (Crosby Group Inc the Mckissick Plant Div), 571-6580814 ITEM 21 (Naval Sea Systems Command), M903268L (Crosby Group Inc the Mckissick Plant Div).
Key specifications for M903268L: Attachment Style: DRILLED SWIVEL EYE AND SHACKLE; Becket Type: ROUND EYE; Sheave Bearing Lubrication Method: SELF-LUBRICATED; Load Rating: 20000.0 POUNDS MAXIMUM LBS. 14 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.