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ASME 18.8.2 Heavy weight Metric Series :-

Pin materials and Hardness		Pin Finishes
Carbon Steel (Austempered)	HV 500-560	Plain *
Carbon Steel (Hardened & tempered)	HV 420-500	Passivated
Chrome Stainless Steel	HV 440-560	Phosphated
Nickel Stainless Steel	Work Hardened	Zinc plated
* Plain carbon steel pin have a protective oil finish

Specification in MM

1 Minimum diameter is the average of D1,D2,D3.. 2 Maximum diameter measured with go-ring gauge.
3 RFPL standard.. 4 Carboon steel only
Standard Length and Weights (Kg per 1,000 Pcs.)

* In conformance with but not part of ASME 18.18.4M + Not generally a stocked diameter.