In metal fitting, a lap joint is for joining two pieces of materials by overlapping them. A lap may be divided into full lap and half lap. In a full lap joint, no material is removed from each of the members so that resulting joint is their combined thickness. In a half lap joint, material is removed from both members, resulting in a joint which is the thickness of the thickest member. A full lap is widely used for temporary framing and timber frame construction etc., while a half lap joint is extensively used for frame assembly in cabinet making.

Size
Lap joint: 1/2"～24"
DN15～DN600

Wall Thickness
sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100,
sch120, sch140, sch160, xxs, sch5s, sch20s, sch40s, sch80s
Max. wall thickness: 200mm

Materials
Carbon steel: ASTM/ASME A234 WPB-WPC
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70