1. ASTM A453/A453M-2017 "Standard Specification for High-Temperature Bolting Materials with Expansion Coefficients Similar to Austenitic Stainless Steel" series nuts.

Grade: Gr.660A, 660B, 660C, 660D.

2. ASTM A194/A194M Gr.8, 8A nuts, selected materials: AISI304/S30400

3. Specifications: M8-M64; 3/8"-4".

4. Nut size standards:

GB/T6170, GB/T6172, GB/T6175, GB/T9125 (large hexagon), HG/T20634 (special), HG/T20613 (special), SH/T3404, DIN934, ISO4032, ISO4035, ANSI (UNC/UNF/UN) American standard coarse/fine/8-tooth permanent, ANSI/ASME B18.2.2 American heavy, UNI5587 heavy, UNI5588, ASME B18.2.4.1M, ASME B18.2.4.2M, ASME B18.2.4.3M, ASME B18.2.4.6M metric hexagon nuts, etc.

5. Applicable to: high and medium pressure valves; marine, shipbuilding, chemical, fluid engineering; pressure vessels; petrochemical equipment and other high temperature and high pressure equipment

6. Surface treatment: natural color, Xylan coating, etc.