Aluminum straight knurled round thin nuts. Precision straight knurled aluminum 6061 / 6082 lock nuts can be installed and removed by hand. No tools required.
Round half nuts are often refereed to as Jam nuts, Lock Nuts, and Thin Nuts. As the name suggests these are a thinner nut than the standard Round Full Nuts. You use two nuts to lock up against each other. These Round Half Nuts are self color which is a plain black finish with no plating.
These straight knurled / diamond knurled round 6061 / 6082 aluminum thin nuts placed on head of screw or shafts, allowing for tightening or loosening by hand. Hand-turned screw used for adjustment screws or bolts to be removed at a later date.