Shutter Barrel Screw is Different Between Source Four and Source Four LED
The screw used to hold the shutter barrel assembly into an incandescent Source Four is different from that used in Source Four LED.
Description/Explanation of Issue
The reason for this is the housing on the Source Four LED is slightly larger, and a longer screw was needed to hold the barrel in place.
Source Four LED uses HW5832. SCR 1/4-20 X 3/4 Ph PH MS BZ
Source Four uses HW5197. SCR 1/4-20X5/8 Ph PH MS BZ