Yellow Zinc Hex Washers Head Self-Drilling Screw M5.5*18
China factory direct supply yellow zinc hex washer head self-drilling screws for wholesale. These professional metal drilling screws feature advanced self-drilling point that eliminates pre-drilling needs. The yellow zinc coating provides enhanced corrosion resistance for construction and HVAC applications. Perfect for metal to metal fastening in various industrial projects. Bulk discounts available for distributors and contractors worldwide.
Yellow Zinc Hex Washers Head Self-Drilling Screw M5.5*18 Applications:
Yellow zinc hex washer head self-drilling screws excel in fast, corrosion-resistant fastening across key areas. They secure thin metal sheets (galvanized steel, aluminum) to frames in roofing/siding, skip pre-drilling, and use integrated washers to avoid material damage. Ideal for HVAC ductwork, equipment enclosures, DIY projects (metal shelving, outdoor fixtures), and light automotive trim, their yellow zinc coating stands up to moisture and mild exposure, while hex heads enable easy tightening with standard tools.
Hex Washers Self-Drilling Screw Material:
Self Drilling Screw Material：Stainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L ,SS31803 ; carbon steel ; aluminum alloy ; brass
Steel Grade: DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A449,
Self Drilling Screw Finishing：Zinc(Yellow,White,Blue,Black),Hot Dip Galvanized(HDG),Black, Geomet,Dacroment,anodization,Nickel plated,Zinc-Nickel plate
Yellow Zinc Hex Washers Head Self-Drilling Screw M5.5*18 dimension and size:
| Specification | Thread width | Head width(ds) | Wafer diameter | Head Thickness | |||
| min | max | min | max | min | max | ||
| M4.2 | 1.4 | 6.7 | 7 | 8.1 | 8.8 | 3.5 | 4 |
| M4.8 | 1.6 | 7.78 | 8 | 9.8 | 10.5 | 3.7 | 4.6 |
| M5.5 | 1.8 | 7.78 | 8 | 10 | 11.3 | 4.6 | 5.1 |
| M6.3 | 1.8 | 9.32 | 9.52 | 12.19 | 13.21 | 5.13 | 6.1 |
| The data is measured manually, please refer to the actual product. | |||||||
Yellow Zinc Hex Washers Head Self-Drilling Screw M5.5*18 measurement and dimension :
