The Shackle, cataloged under National Stock Number 4030-01-037-6517, 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 7 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4030-01-037-6517 |
| Item Name | Shackle |
| FSC / FSG | 4030 / 40 — Fittings for Rope, Cable, and Chain |
| Status | ACTIVE |
| End Condition | THREADED |
| Criticality Code Justification | ZZZX |
| Style Designator | ANCHOR |
| Departure From Cited Designator | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Closure Head Style | SHOULDER EYE |
| Surface Treatment | ZINC |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| RR-C-271D | 5/9 Secondary reference U.S. Government activity |
| 4791-584PC14 | 5/1 Secondary reference U.S. Government activity |
| RR-C-271D TYPE 4A GR A CL 2 3/4 | 2/2 Government specification standardization U.S. Government activity |
| 73917-52X1PC5 | 5/1 Secondary reference U.S. Government activity |
| RR-C-271 | 4/1 Identification reference U.S. Government activity |
| 1018491 | 5/1 Secondary reference The Crosby Group Llc Dba the Crosby Group |
| 61-01-5131 | 5/1 Secondary reference U.S. Government activity |
| 87725-2501IT3 | 5/1 Secondary reference U.S. Government activity |
| 4791-585PC11 | 5/1 Secondary reference U.S. Government activity |
NSN 4030-01-037-6517 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): 4030-01-571-7183. Verify interchangeability with system specifications before substitution.
Key specifications for 4030-01-037-6517: End Condition: THREADED; Criticality Code Justification: ZZZX; Style Designator: ANCHOR; Departure From Cited Designator: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS. 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.