NYLON THUMBSCREWS FOR COLLIMATING RINGS

I am selling these HARD-TO-FIND, all Nylon, non-marring thumbscrews in sets of six to replace your all metal or nylon tipped metal thumbscrews (like the OEM thumbscrews that come with Russian-made finderscopes) and for other astro requirements where non-scratching/non-marring thumbscrews are desirable. The thumbscrews are metric size M4 x 25mm w/ 0.7 pitch, which is what makes them so hard to find – it took me weeks to source them. Set of six for $3.50 shipped (w/in CONUS). PayPal preferred, but checks and MO’s also accepted.