Haihao Group Ships ASTM A320 L7 Stud Bolts with A194 Gr.4 Nuts to Russian Client

Low-temperature flange bolting is a critical component that cannot compromise on material toughness and thread precision, especially for industrial piping projects across Russia. Haihao Group has completed inspection and shipment of ASTM A320 Gr.L7 stud bolts matched with ASTM A194 Gr.4 heavy hex nuts to our Russian partner.

This shipment includes two common sizes: 1″×145 and 7/8″×125. Each ASTM A320 Gr.L7 stud bolt is supplied complete with two matching A194 Gr.4 nuts, manufactured and marked in accordance with ASME B18.2.1 and ASME B18.2.2 specifications. The ASTM A320 Gr.L7 stud bolt is engineered for low-temperature service, offering reliable impact performance under cold operating conditions.

ASTM A320 Gr.L7 stud bolt with A194 Gr.4 nut ASME B18.2.1 for Russian flange assembly

Thread fit and hardness matching between bolt and nut directly affect long-term sealing stability of flange joints. Our QC team verifies thread dimension, surface finish and material certification before packing. Every ASTM A320 Gr.L7 stud bolt in this order comes with full material test documentation, to support site acceptance and third-party inspection required by the Russian end user.

Many Russian EPC and piping contractors prefer this bolting combination because the ASTM A320 Gr.L7 stud bolt and A194 Gr.4 nut set pairs well with standard ASME flanges, simplifying material control and traceability on site. We maintain stable stock and custom production capacity for low-temperature bolting sets of various lengths and diameters.

If you are sourcing low-temperature flange fasteners with defined material grades and ASME thread standards, send your bolting list to our engineering team. We will review your technical requirements and provide a fully certified supply solution.