Concrete anchor bolts are used in new construction to secure a structure's walls to concrete slabs and foundation walls, to fasten steel columns to concrete piers and to anchor machinery to concrete pads. These anchor bolts are sunk into the wet concrete by hand immediately after the concrete slab is poured.  You can leave as much of the bolt sticking out of the slab as you need.  The anchor bolt can be straightened or plumbed as the concrete hardens. There are basically two types of anchor bolts for concrete; J-bolts and wedge anchors.

J-bolts are set into fresh concrete. This type of anchor bolt is shaped like the letter L, so it can not be pulled out of the concrete after the concrete has hardened.

Specification: ANSI, ISO JIS GB, DIN, Non-standard-according to customers’ drawings.
DIA: 1/2”, 5/8”, 3/4”, 7/8”, 1”, M12, M14, M16, M18, M20, M22, M24, M27, M30 or as per customer's specification
Length: 200, 250, 300, 400, 500, 600, 700, 800, 900, 1000 or as per customer's specification
Material: carbon steel, stainless steel
Finish: Electro-galvanizing/ Zinc plated/ Hot dip galvanizing
Usage: aerospace, automobile, motorcycles, agricultural machinery, construction transportation, electric power, electronics, chemicals, home appliances, military industry etc.