Hex chamfered single face
Hex with hole
Hex with shoulder
Hex chamfered double faces
Hex unchamfered
JB/T 2775-1992
Hexagon nuts for PN16～32MPa
JB/T 11010-2010
Crawler dozer-Nuts for track shoe and sprocket segment
JB/T 8004.3-1999
The parts and units of jigs and fixtures connection nut
