Complete thread tooth type, pass gauge need go through smoothly,and stop gauge must stop in two thread tooth.
The thread thooth type surface is smooth and can not have burr.
Can not have short of a tooth, broken tooth, , partial tooth and any defects which can effect on the quality

Our company rebar splicing coupler has high connecting strength, high speed of connecting , high construction efficiency
Save material, save energy efficiency, economic advantages. Rebar splicing coupelr can be applicable to all kinds of rebar connection projects .
Our company rebar splicing coupler pass inspection of the national construction engineering quality supervision and inspection center .
All items meet the standards. It is manufacture by  performance  is not less the 45 carbon structural steel to manufacture ,
Its mechanical properties, chemical composition can Conform to GB699 standards.
The standard value of rebar couler yield strength and tensile strength is more than 1.10 times of standard of  Corresponding steel  bearing capacity
The tensile strength of rebar splicing coupler is higher than the tensile strength of base metal . and is higher than 0.9 times of measured value of tensile strength of base metal . the thread precision is according to the provision GB197, The rebar coupler inside thread 6H grade ,
thread head 7 g grade, tooth type surface roughness is according to GB/T1031 regulation, Ra value of 6.3 um, the rest of the processing  parts surface roughness Ra value of 12.5 um. anti-embroidered Surface treatment , No rust, oil, cracks, black and other defects
screw holes at both ends is protected by plastic plug