Hello Adam,

I'm impressed with the digital caliper. My sample spade lug (Tributaries SL-8) that fits the M80s (glad you liked them), M22ti's, VP100, VP150, etc.has an inside diameter of 9.6 mm (3/8 in.) and an outside diameter of 13 mm (1/2 in.).

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)