Round-lead mechanical allowance example³Ô¹Ïtv / ENGINEERING EXPLANATIONRound-lead mechanical allowance exampleMinimum finished hole1.1 mmMaximum round lead0.9 mmDiametral allowance0.2 mmConcentric radial allowance0.1 mmNo positional, solder-fill or RF approval.Original schematic. Not production artwork, calibrated data or performance evidence.