Can you supply Auto-lok nuts H&C parts?

Yes, the H&C Parts are double-slotted turret nuts class CL8.

The dual-lock self-lock nut is zinc passivated.

Auto-Lok nut recommends switching over to the class 8 Auto-Lok nut yellow plated.

It's Zinc & Yellow RoHS

H&C Parts AUTO-LOK NUT
1687M45 ALNdM4X070CL8
1687M47 ALNdM5X080CL8
1687M49 ALNdM6X100CL8
1687M54 ALNdM8X125CL8
1687M56 ALNdM10X150CL8
1687M58 ALNdM12X175CL8
1687M60 ALNdM14X200CL8
1687M62 ALNdM16X200CL8
1687M63 ALNdM18X250CL8
1687M64 ALNdM20X250CL8
1687M65 ALNdM22X250CL8
1687M66 ALNdM24X300CL8
1687M69 ALNdM30X350CL8