The Alloy Steel Durable Screw Pin Shackle for Rigging stands as a cornerstone in heavy-duty lifting and load-securing operations, engineered to excel in the most demanding industrial and maritime environments.
The Alloy Steel Durable Screw Pin Shackle is for marine, construction, mining, and energy lifting. Made of heat-treated Grade 80 alloy steel (Q690/35CrNiMo, C 0.32-0.38%), with 50% higher tensile strength (≥800MPa) than Grade 43 carbon steel. WLL: 2-50 tons (3/8"-3" diameter) with 6:1 safety factor (breaking load ≥6×WLL). Features fully threaded pin (thread grade 6g) and HDG coating (85-100μm, 450℃ molten zinc). Withstands -40℃ to 200℃ (-40℃ impact ≥27J, 200℃ tensile retention ≥90%); passes 1000-hour salt spray test (ISO 9227). Complies with ASME B30.26 and CE; laser-etched with WLL, grade, diameter, logo, and batch number.
Secures 20-50 ton containers to ship decks (HDG coating, 15-year offshore life) and 10-15 ton underwater cables to seabed anchors (withstands 10MPa pressure). Connects 30-40 ton precast piles to crane hooks (15m/s winds); hexagonal nut fits wrenches even with salt corrosion.
Lifts 20-30 ton steel columns (high-rises) and 40-50 ton concrete beams (bridges) via cranes. HDG coating resists construction dust/rain (6-month rust-free). Lifts 15-25 ton boiler components (power stations); wide throat (e.g., 80mm for 3" diameter) fits ≤60mm hooks.
Supports 10-20 ton conveyor parts (mines, impact energy ≥50J) and secures 25-35 ton excavator attachments (100-300Hz vibration). Fastens 30-40 ton wind turbine foundations (cold offshore -40℃) and stabilizes 15-20 ton drill pipe hangers (oil rigs, optional Loctite coating).
Heat-treated (880-920℃ quenching, 550-600℃ tempering) for 800-900MPa tensile, 640-720MPa yield, ≥12% elongation. Forged body (3:1 ratio) eliminates defects; 100% MPI (ASTM E709) detects flaws.
HDG coating (85-100μm) uses 99.95% pure zinc, lasting 5-8 times longer than electro-galvanizing. Compatible with lithium grease for pin maintenance.
6:1 safety factor exceeds ASME B30.26’s 4:1 requirement. Permanent laser markings enable traceability; pin engages ≥3 thread turns, with optional cotter pin hole. Rounded body prevents sling damage.
Hexagonal nut (e.g., 24mm flat for 2" diameter) fits standard tools; knurled surface for glove use. Wide throat (1.2×diameter) fits hooks/slings; compact design (2.5×diameter) for tight spaces. Lightweight (0.5kg for 3/8" WLL 2 tons).
Offers 4" diameter/80-ton WLL (Grade 100 steel, ≥1000MPa) for offshore platforms and 1/4" diameter/0.5-1 ton WLL (Grade 60 steel) for workshops. Adjusts throat width and pin length; provides WLL/breaking load test reports.
Uses 35CrNiMoV (≥20J at -60℃) for Arctic projects, 2507 super duplex stainless steel for chemical plants. Coatings include Dacromet (1200-hour salt spray), color-customizable epoxy, and PTFE (low-friction).
Provides ABS-certified (marine), CSA-certified (North America), and OSHA-compliant shackles. Adds self-locking nuts (high vibration), RFID tags (traceability), and load sensors (real-time overload alerts). Certifications from SGS/DNV.
