ButtonHex socket head cap screw(Okitsu Rasen(JIS(Coarse Stainless steel Unplated 8X40X40 Pitch 1.25

※For countersunk screws, the overall length including the head is the nominal length.

■Difference between SUS410 and stainless steel (XM7, 304).

A wing bolt (butterfly bolt) is a bolt with a wing-shaped head that can be tightened or loosened by hand without the use of tools. They are classified into 1 to 3 types depending on the shape of the head. The thread is coarse thread. · Press wing bolt···The wings (knob portion) of the head are manufactured by press forming.

• Button cap screw Okitsu Rasen JIS Coarse pitch
• JIS B 1174
• Nominal diameter (d) M8
• Length under head (L) 40.0
• Coarse pitch 1.25
• Head diameter (dk) Max 14.00 Min 13.57
• Head height (k) Max 4.4 Min 4.1
• Hex socket width across flats (s) Nominal 5 Max 5.140 Min 5.020
• Hex socket depth (t) Min 2.60