Circular clip on test points (PC Test Points):
Manufactured by Keystone.
5000-5005 much cheaper on Mouser.
Prefix with 534- for mouser part #.
500x End with -ND for Digikey part #. 511x End with K-ND for Digikey.
Mini PC Test Points:
5000-5005 = { Red, Black, White, Orange, Yellow }
5115-5119 = { Brown, Green, Blue, Grey, Purple }
Normal Test Points:
5005-5009
Pomona banana to clip leads: 3782-24-0, 3782-24-2 (24 is length in inches, 0=black, 2=red)