External 4-38 mm 5⁄32" - 11⁄2" Internal 8-32 mm 5⁄16" - 11⁄4"
External M4 - M19 5⁄32" - 3⁄4" Internal M8 - M20 5⁄16" - 13⁄16"
External M4 - M19 5⁄32" - 3⁄4" Internal M8 - M16 5⁄16" - 5⁄8"