The Shackle, cataloged under National Stock Number 4030-01-391-9599, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4030-01-391-9599 |
| Primary Part Number | 12378642-004 |
| Item Name | Shackle |
| FSC / FSG | 4030 / 40 — Fittings for Rope, Cable, and Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Inside Length | 4.250 INCHES NOMINAL IN |
| Material Diameter | 1.125 INCHES NOMINAL IN |
| Style Designator | ANCHOR |
| Opening Width | 1.810 INCHES NOMINAL IN |
| Material Document and Classification | RR-C-271 TY 4A CL 1 AND 2 FED SPEC SINGLE MATERIAL RESPONSE A |
| Material | STEEL |
| Breaking Strength | 12500.0 BELT GROUP 1 |
| 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 |
|---|---|
| 12378642-004 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12378642-004 | 5/9 Secondary reference Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc |
| 5550379 | 5/9 Secondary reference The Crosby Group Llc Dba the Crosby Group |
NSN 4030-01-391-9599 is a Shackle, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4030, Fittings for Rope, Cable, and Chain. Status: active.
NSN 4030-01-391-9599 has 1 manufacturer part number on file: 12378642-004 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12378642-004: Inside Length: 4.250 INCHES NOMINAL IN; Material Diameter: 1.125 INCHES NOMINAL IN; Style Designator: ANCHOR; Opening Width: 1.810 INCHES NOMINAL IN. 7 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.