10.9 Hex bolt(Fine Steel Zinc plated(Silver) 12X90X30(1.25 Pitch 1.75

Please contact us if you need to verify the thread section.

Depending on the diameter size, lengths equal to or greater than the following will be partial thread (half thread).
8 X 50　only　
10 X 35　and above
12 X 35　and above
14 X 40　and above
16 X 45　and above
18 X 55　and above
20 X 60　and above
22 X 65　and above
These are strength class 10.9 bolts with "10.9" stamped on the head.
They have a regular hexagonal head and are tightened using a wrench or spanner.
They can be tightened more securely than slotted or cross recessed screws.
●Full thread = A bolt where the entire length below the head is threaded. (General guideline: 30mm or shorter in length)
●Partial thread (semi-bolt) = A bolt that is only threaded from the tip partway up the shank.
Partial thread length calculation method (approximate guideline)
L = up to 129　　　Thread diameter (size) × 2 + 6
L = 130–219　　　Thread diameter (size) × 2 + 12
L = 220 and above　　　Thread diameter (size) × 2 + 25
Example: For an M10×250 partial thread bolt, since L (length) is 220 or greater, the threaded portion = 10×2+25 = 45mm.
Screw Pitch & Hex Width Across Flats List　Hex Bolt Encyclopedia

• 10.9 Hex bolt Fine pitch
• Nominal diameter (d) M12
• Length under head (ℓ) 90.0
• Pitch 1.25
• Head height (k) Nominal 8 Tolerance ±0.3
• Width across flats (s) Nominal 19 Tolerance 0,-0.8
• Width across corners (e) Approx. 21.9
• End chamfer (z) Approx. 2