SmallHex bolt(Full thread(Coarse Steel Trivalent white(Silver) 12X20 Pitch 1.75

Generally, a bolt refers to a screw used together with a nut. Among these, the representative hex bolt features a regular hexagonal head and is tightened using a wrench or spanner.
It can be tightened more securely than slotted or cross recessed screws.
●Full thread = A bolt in which the entire length below the head is threaded. (Generally for lengths of 30mm or less)
●Partial thread (standard bolt) = A bolt that is only threaded from the tip partway up the shank.
Partial thread length calculation method (approximate guide)
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 greater, the thread length is 10×2+25 = 45mm.
Thread Pitch and Hex Width Across Flats Reference Chart　Hex Bolt Encyclopedia

• Small hex bolt full thread coarse pitch
• Nominal diameter (d) M12
• Length under head (ℓ) 20.0
• Coarse pitch 1.75
• Head height (k) Nominal 8 Tolerance ±0.3
• Width across flats (s) Nominal 17 Tolerance 0,-0.8
• Width across corners (e) Approx. 19.6