1. 特有腐蚀阻力和机械强度
Manufactured from 304 stainless steel (18/8) in accordance with DIN 316, these wing-head and thumb-style bolts deliver outstanding durability in harsh environments. The austenitic stainless alloy offers superior resistance to rust, oxidation, and chemical attack—even in marine, food-grade, and outdoor applications—while maintaining a tensile strength of approximately 500–700 MPa and excellent toughness at both high and low temperatures.

2. 宽度应用

Butterfly Wing Hand Screws Bolts Fastener are great for professionals, amateurs, landlords, handymen, repair men, women, woodworking, construction, plumbing, HVAC and so on. They also worked well for 3 Dimensional printed projects. The kit is to replace broken lost. Use on sheet metal and wood. The Kit is an ideal tool for home and workplace, too. A variety of sizes can meet the maximum of requirement for you.
Ideal for quick-access assemblies and frequent adjustments, these fasteners excel in machinery guards, electrical enclosures, laboratory equipment, photographic rigs, woodworking jigs, and HVAC panels. The butterfly-style wing head and knurled thumb knob make them perfect for tool-free installation in furniture fittings, exhibition stands, musical instruments, and any application where rapid assembly or repeated hand-tightening is required.

3.操作简便，无需工具
The ergonomically contoured wing and thumb heads allow secure finger-tight fastening up to recommended torque (typically 2–4 Nm) without tools, reducing assembly time and minimizing risk of over-tightening. Deep, smooth wing profiles and coarse knurling ensure a comfortable grip and precise torque control, while the integrated shoulder beneath the head provides accurate spacing and repeatable clamping force in adjustable setups.

4.Certified Precision & Long-Lasting Quality
Produced in ISO 9001-certified facilities and conforming to DIN 316 tolerances, each component undergoes rigorous dimensional inspection, surface‐finish verification (electro‐polished or passivated), and thread‐geometry testing. Salt‐spray resistance exceeds 240 hours per ASTM B117 after passivation. Full material traceability and batch certificates are provided, ensuring consistent performance in critical industrial, laboratory, and consumer applications.