The Shackle, cataloged under National Stock Number 4030-00-377-1204, is classified within Federal Supply Class 4030 (Fittings for Rope, Cable, and Chain) of the Rope, Cable, Chain, and Fittings group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4030-00-377-1204 |
| Item Name | Shackle |
| FSC / FSG | 4030 / 40 — Fittings for Rope, Cable, and Chain |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM A153 ASSN STD 1ST TREATMENT RESPONSE OR QQ-Z-325,CL 2 FED SPEC 2ND TREATMENT RESPONSE AND QQ-Z-325,CL 2 FED SPEC 3RD TREATMENT RESPONSE |
| Inside Length | 3.688 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN |
| End Condition | PLAIN |
| Material Diameter | 1.250 INCHES MINIMUM IN |
| Style Designator | CHAIN |
| Opening Width | 1.969 INCHES MINIMUM AND 2.093 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A576 ASSN STD 2ND MATERIAL RESPONSE |
| Locking Device Type | COTTER PIN |
| Nondefinitive Spec/std Data | 2 TYPE AND B GRADE AND 1 CLASS |
| Closure Head Style | FLAT |
| Surface Treatment | ZINC OR ZINC AND CHROMATE |
| Material | STEEL OR STEEL COMP 1020 |
| Breaking Strength | 80000.0 HARNESS 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 |
| Reference | Meaning |
|---|---|
| G215-1-1-4 | C/1 Advisory reference — outside the item-of-supply concept The Crosby Group Llc Dba the Crosby Group |
| RR-C-271 | 4/1 Identification reference U.S. Government activity |
| MS90729-3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| F271-A42-B1Z20 | 2/2 Government specification standardization U.S. Government activity |
| MILS24214 | 5/9 Secondary reference U.S. Government activity |
| RR-C-271,TYIVB,GRB,CL1,SZ1-1/4IN | 5/9 Secondary reference U.S. Government activity |
NSN 4030-00-377-1204 is a Shackle, classified under FSC 4030, Fittings for Rope, Cable, and Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-00-894-4232. Verify interchangeability with system specifications before substitution.
Key specifications for 4030-00-377-1204: Surface Treatment Document and Classification: ASTM A153 ASSN STD 1ST TREATMENT RESPONSE OR QQ-Z-325,CL 2 FED SPEC 2ND TREATMENT RESPONSE AND QQ-Z-325,CL 2 FED SPEC 3RD TREATMENT RESPONSE; Inside Length: 3.688 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN; End Condition: PLAIN; Material Diameter: 1.250 INCHES MINIMUM IN. 13 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.