8.8Hex bolt(Kyoei(Coarse Steel Chromate(Ochre) 10X40 Pitch 1.5

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

Generally, a bolt refers to a screw used together with a nut. Among these, the representative hex bolt has a regular hexagonal head and is tightened using a wrench or spanner.
It can be tightened more strongly than slotted or cross recessed screws.
●Full thread = A bolt where the entire length below the head is threaded. (Generally applicable for lengths of 30mm or less)
●Partial thread (intermediate bolt) = A bolt that is only threaded from the tip partway up the shank.
Partial thread calculation method (approximate guideline)
L = up to 129     Nominal thread diameter × 2 + 6
L = 130–219     Nominal thread diameter × 2 + 12
L = 220 and above     Nominal thread diameter × 2 + 25
Example: For an M10×250 partial thread bolt, since L (length) is 220 or more, the threaded length = 10×2+25 = 45mm.
Thread Pitch & Hex Width Across Flats Reference List　Hex Bolt Encyclopedia

• 8.8 Hex bolt Kyoei Coarse pitch
• Nominal thread diameter M10
• Length under head (ℓ) 40.0
• Pitch (P) 1.5
• Body diameter (ds) Nominal 10 Tolerance 0,-0.2
• Head height (k) Nominal 7 Tolerance +/-0.3
• Width across flats (s) Nominal 17 Tolerance 0,-0.7
• Width across corners (e) Approx. 19.6
• Head top surface diameter (dk) Approx. 16.5