The Shackle, cataloged under National Stock Number 4030-01-581-2021, is classified within Federal Supply Class 4030 (Fittings for Rope, Cable, and Chain) of the Rope, Cable, Chain, and Fittings group. The manufacturer of record is The Crosby Group Llc Dba the Crosby Group. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4030-01-581-2021 |
| Primary Part Number | G-2091018678 |
| Item Name | Shackle |
| FSC / FSG | 4030 / 40 — Fittings for Rope, Cable, and Chain |
| Manufacturer | The Crosby Group Llc Dba the Crosby Group |
| Status | ACTIVE |
| Inside Length | 10.500 INCHES NOMINAL IN |
| Material Diameter | 2.710 INCHES NOMINAL IN |
| Style Designator | ANCHOR |
| Opening Width | 4.130 INCHES NOMINAL IN |
| Eyelet Style | ROUND PLAIN |
| Closure Head Style | SHOULDER EYE |
| Eye Inside Diameter | 2.750 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| G-2091018678 PRIMARY | The Crosby Group Llc Dba the Crosby Group (USA) |
| Reference | Meaning |
|---|---|
| 111-5486616 ITEM 29 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4030-01-581-2021 is a Shackle, manufactured by The Crosby Group Llc Dba the Crosby Group, classified under FSC 4030, Fittings for Rope, Cable, and Chain. Status: active.
NSN 4030-01-581-2021 has 1 manufacturer part number on file: G-2091018678 (The Crosby Group Llc Dba the Crosby Group).
Key specifications for G-2091018678: Inside Length: 10.500 INCHES NOMINAL IN; Material Diameter: 2.710 INCHES NOMINAL IN; Style Designator: ANCHOR; Opening Width: 4.130 INCHES NOMINAL IN. 8 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.