These wing nuts allow high tightening torque values. The slightly concave marks on the wings help to position the fingers in order to apply the maximum force when tightening.
AISI 304 stainless steel, sandblasted matte finish.
Standard executions:
EWNM-SST: threaded blind hole.
EWNM-SST-FP: threaded pass-through hole.
EWNM-SST-p: threaded pin
Special executions on request with different threadings.