The Shackle, cataloged under National Stock Number 4030-00-066-0184, 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7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4030-00-066-0184
Item Name
Shackle
FSC / FSG
4030 / 40 — Fittings for Rope, Cable, and Chain
Status
ACTIVE
Inside Length
4.500 INCHES NOMINAL IN
Material Diameter
0.875 INCHES NOMINAL IN
Style Designator
ANTITOPPLING
Opening Width
1.312 INCHES NOMINAL IN
Features Provided
FORELOCK PINHOLE
Closure Head Style
FLAT
Material
STEEL COMP 1037
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
2640-00-251-8050POSSIBLE MATCH
VALVE,PNEUMATIC TIRE
Possible match (shared part number)
6105-00-548-0592DL8-178WS4351POSSIBLE MATCH
ARMATURE,MOTOR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-00-597-234381-7/8POSSIBLE MATCH
HOOK,SCREW
Possible match (shared part number)Chas. O. Larson Co. Dba Larson Hardware Manufacturing
5910-01-096-79598178POSSIBLE MATCH
CAPACITOR,FIXED,PAPER DIELECTRIC
Possible match (shared part number)Carlisle & Finch Co
NSN 4030-00-066-0184 is a Shackle, classified under FSC 4030, Fittings for Rope, Cable, and Chain. Status: active.
What NSN replaces 4030-00-066-0184?
8 possible matches (shared part number, not a government interchangeability claim): 2640-00-251-8050, 6105-00-548-0592, 5340-00-597-2343. Verify interchangeability with system specifications before substitution.
What are the specifications of 4030-00-066-0184?
Key specifications for 4030-00-066-0184: Inside Length: 4.500 INCHES NOMINAL IN; Material Diameter: 0.875 INCHES NOMINAL IN; Style Designator: ANTITOPPLING; Opening Width: 1.312 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4030-00-066-0184 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.