The Block,tackle, cataloged under National Stock Number 3940-01-338-5866, 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 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3940-01-338-5866 |
| Primary Part Number | 8003557 |
| 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 |
| Becket Type | SWIVEL EYE |
| Tackle Accommodated Type | WIRE ROPE |
| Block Type | REGULAR |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 8003557 PRIMARY | Crosby Group Inc the Mckissick Plant Div (USA) |
| Reference | Meaning |
|---|---|
| 6609842ITEM32 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 6609842 | D/9 Drawing number reference only Naval Sea Systems Command |
| 8911-247-21 | 3/1 Design control — primary reference Crosby Group Inc the Mckissick Plant Div |
NSN 3940-01-338-5866 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 3940-01-338-5866 has 1 manufacturer part number on file: 8003557 (Crosby Group Inc the Mckissick Plant Div).
4 possible matches (shared part number, not a government interchangeability claim): 3940-01-338-5868, 3940-01-338-5869, 3940-01-339-3055. Verify interchangeability with system specifications before substitution.
Key specifications for 8003557: Attachment Style: DRILLED SWIVEL EYE; Becket Type: SWIVEL EYE; Tackle Accommodated Type: WIRE ROPE; Block Type: REGULAR. 5 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.