Material: Metal colour: Black Package Contents: 1 x Bolt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Public thread size- x 0.7-M5 x 0.8-M6 x 1.0-M7 x 1.0- x 1.0-M 8 x 1.25-M10-M10-M10-M10 x 1.5-M2 x 1.25-M2 x 1.75-M14 x 1.5-M14 x 2.0-16 mm x 2.0 British thread size-#6-32 fine-#8-32 fine-#10-24 thick-#10-32 fine -1/4-20 thick -1/4-28 thin-5/16-18 thick-5 /16-24 fine -3/8-16 thick -3/8-24 fine -7/16-14 thick -7/16-20 fine -1/2-13 thick -1/2-20 fine -5/5/ 8-11 thick 5/8-18 fine 3/4-10 thin There are 8 holes of the nut and bolt thread checkup, which are 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 1/4 inches, 1/2 inches, which can help you quickly and accurately determine the screw size and recommend it. The drill or tap size required for the screw. The bolt size and thread quantity regulations have common standards and public thread size, identifying the 6 to 3/4inch and 4mm to 16mm hardware. Each size has a nut and bolt checker in the same amount. materials-bolts and nut recognition instruments are made of High-quality materials and 12.9-level hardness tools processed by CNC. The anode oxidation makes it stable and . The scale line is printed by the laser, and the easy -to -read tag belt has a bright black background.