4-40 Standoffs

thingiverse

Plastic standoffs are oddly expensive so I made my own. The hole is worked out to be just the right size to get a solid thread with minimal force using a 4-40 tap drill ($5-10 at any hardware store). Using a tap drill is highly recommended for a solid fit. In a pinch you can screw in 4-40 machine screws with a screwdriver and some force. Thread on both sides to use as separators between boards. Takes about half a gram of PLA for 1" standoff and 1-2 minutes per standoff. Good use for the last meter or two of a spool. Lengths: 1/4", 1/2", 3/4", 1", 2" Size: 6.2mm from flat side to side. Material: PLA tested, others presumably work Infill: 100% Temperature: 195-200C Height: .3mm Outer shape: Hexagon The base is included to make your own custom length and hole sizes, so you can make them fit any screw. I have found they stay strong and effective as large as ~4.3mm (up to 8-32 or M4 screws) without expanding the outer diameter. Used 1.42mm radius for 4-40 screws with a tap drill. All designs include the original sketchup file for modification.