The base was then placed in the mill vise where it was drilled for an 8-32, 82-degree socket-head screw
. The base was again attached with the three screws, making sure the screws didn't protrude beyond thread depth.
The cutter tips, which are available in stainless steel, tool steel, and tungsten carbide, can be slid onto blade holders and secured with one retaining socket-head screw
, allowing rapid replacement.
Use a 3/8-in socket-head screw
key to remove both pipe screws on the barrel of the MRS.
The hole is beveled for an 82-degree, flat-head, socket-head screw
. The screw head must be below the sliding safety as it moves rearward.
A 1/4-20 socket-head screw
holds these parts firmly in position.
Following this, I beveled the larger hole with an 82-degree countersink for an 8-32 socket-head screw
On the left and fight side of the base are socket-head screws
, which enter the hole in the base and engage the stud.
My secondary cage has 3/8-inch-thick rings, so I used 3/4-inch-long 1/4-20 socket-head screws
with pressed-on plastic knobs.
The only materials required are two 8-32 x l/2-inch socket-head screws, two 1/2-inch number 8 round-head sheet metal screws, and a length of flat metal stock 9/16 x 3/16 x 4 3/8 inches in length.
The receiver wall is fully 0.110-inch thick where it is tapped, providing sufficient screw thread depth for hardened socket-head screws. I started with screws a bit over length as the mount and spacer were tightened in position and later cut the screws to exact length.
I considered various methods of attaching the C-channels to the tube segments and wound up using 1/4-20 socket-head screws
mounted in the tubes and keyhole slots in the struts.
The base of the trigger is attached to the flame of the crossbow with three #6-32 countersunk socket-head screws