Tag Archives: nuts per 174PH ASTM F593

Q: So I was told that 17-4PH Group 630 bolts per ASTM F593 are heat treated to H1150. So how is a 17-4PH F593 bolt any different from the standard 17-4PH H1150 bolt, as they both have the same heat treatment? A: Great question. Yes, you are correct, they are … Continue reading

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