What's the KL3's inner bolts thread and size? [PIC]

[FredericoFreire]

Anyone knows the bolt threads and size used inside the Surefire KL3 head shown on the picture below?

Please help!

Thanks!

 

[FredericoFreire]

Just found out that they're the same as the ones used to hold the pocket clip on the HDS lights. #4-40 x 3/16".