Metric hex bolts, Super Fine, 20mm

Hex bolts have hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.

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Metric hex bolts, Super Fine, 20mm
Tap bolts A full thread bolt with a six sided head. Zinc plated class 8.8 steel A low carbon steel for general use. Zinc plated for moderate corrosion resistance. A tempered medium carbon steel. Class 8.8 is hardened, but it is not as strong as class 10.9. It is commonly found in automotive applications. Class 8.8 is similar to grade 5. Zinc plated class 10.9 steel A low carbon steel for general use. Zinc plated for moderate corrosion resistance. A tempered medium carbon steel. Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8. Show Details Hide Details	JIS Tap bolts These bolts have smaller heads that meet the old JIS specification. Available only in diameters where there is a difference in head size. Zinc plated class 8.8 steel A low carbon steel for general use. Zinc plated for moderate corrosion resistance. A tempered medium carbon steel. Class 8.8 is hardened, but it is not as strong as class 10.9. It is commonly found in automotive applications. Class 8.8 is similar to grade 5. Show Details Hide Details