Heading Knob Set Screw

[markejackson02]

In one of my stupid pet tricks I managed to drop the little tiny set screw holding my heading bug knob onto the DG into the belly of the aircraft.  Gone forever.  

It looks like a 4-40 1/8" screw.  Can't find a part number or reference in the parts manual.

Anyone know what it is?

[ShuRugal]

take the knob to the hardware store and try it out on the thread size pegboard.

[Piloto]

Good luck on finding a screw. Go to an avionics/instrument shop and see if you can get a knob from a discarded DG. Or contact the DG manufacturer.

José

[takair]

or go to the local RC hobby shop and get some "wheel collars" and salvage the set screw....or if you are sure it is 4-40, I think I have some, just PM me your address...

[thinwing]

Ace hardware...try a regular 4/40 screw to see if matches..the other possibility is 1/8 th or 2/56...no prob

[Hank]

When I lost mine, I took a selection of set screws home from work. Don't recall if it was #4-40 or #3-48, but it's pretty short. Go to your local hardware store and buy one of each set screw, #2-56. #3-48 and #4-40. If you can buy one of each, about 1/8" long, shouldn't be much more than $1; a hobby shop [RC planes, trains, etc.] should have little 4-packs of them for a couple bucks each. Take the knob with you and see if they will let you test fit; the hardware store won't be a problem, the screws are probably in a little gray drawer a foot wide with a couple dozen compartments inside.

[Yetti]

Ace hardware

[LANCECASPER]

Or you could go to Aircraft Spruce ant type in "set screw" 

http://www.aircraftspruce.com/search/search.php?s=set+screw&x=0&y=0