660 Bolts

January 28, 2017 by · Leave a Comment 


Grade 660 Bolts

ASTM A453 Grade 660 covers four grades of bolting materials Classes A, B, C, and D  for use in High Strength, Heat Resistance Steel
service such as 660 bolts for pressure vessel and flanges. 

Sigma custom manufaters 660 bolting in Hex bolts, hex nuts, screws, washers, studs, and stud bolts.

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