Grainger / Fastenal and these generic machine shop suppliers are a joke with so bad and outdated online ordering interface (at least here in Canada),
McMaster I like way better but doesn't have a large enough selection that can feed in my interest:
Compression Spring; Min ID = 5.0 mm (.197); Max OD = 7.1 mm (.279); Wire Dia = 1.0 mm (.040)
{btw this is the original FX Impact MK2 Valve Spring, free length 45 mm}
I am looking for a wider adjustability with - 30%/+0% deviation, wire Dia 0.7-0.9 mm shall do, different material specs = a bonus
McMaster I like way better but doesn't have a large enough selection that can feed in my interest:
Compression Spring; Min ID = 5.0 mm (.197); Max OD = 7.1 mm (.279); Wire Dia = 1.0 mm (.040)
{btw this is the original FX Impact MK2 Valve Spring, free length 45 mm}
I am looking for a wider adjustability with - 30%/+0% deviation, wire Dia 0.7-0.9 mm shall do, different material specs = a bonus