In 2016 the specification A325 was withdrawn by ASTM and was replaced by ASTM F3125 with A325 as one of the six Grades of F3125. F3125 Grade A325 is a Heavy Hex Head Style Bolt with a minimum Tensile Strength of 120 ksi. and can come in one of two types (Type 1 or Type 3). We currently stock only Type 1 so this information will be limited to a discussion of that type. 4.2.3 Bolts Subjected to Combined Tension and Shear , 50 4.3 Installation of High- Strength Bolts , 52 4.4 Relaxation, 61 4.5 Reuse of High- Strength Bolts , 62 4.6 Galvanized Bolts and Nuts, 63 4.7 Use of Washers, 65 4.8 Corrosion and Embrittlement, 66 4.9 Effect of Nut Strength , 69 4.10 Basis for Design Recommendations, 70 4.10.1 Bolts. Jul 02, 2015 · ASTM A194 Nut Compatibility Chart. Grade of Bolt. A194 Heavy Hex Nut Grade. A193 Grade B7. 2H. A193 Grade B8 (Class 1 and 2) 8. A193 Grade B8M (Class 1 and 2).
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