... special fastener field 1,Name: Left hand steel alloy worm wheel;Left hand worm wheel;Steel alloy worm wheel 2,For the similar worm ... kind of worm wheel: Grade3.6,4.6,4.8,5.6,6.8,8.8,9.8,10.9,12 ... risks.P.S:For us,the most competitive industry is machined hardware fastener ,especially the cutting/turning parts.; Left hand steel alloy worm ...