Finexpress Precision Manufacturing (dongguan) Co., Ltd
Dongguan Zhonggu Metal Co., Ltd
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Product Overview
Engineered for extreme environments, our ASTM A320 L7 Steel Stud Bolts deliver unmatched strength, durability, and corrosion resistance for critical applications in low-temperature and high-pressure systems. Customizable in length, diameter, and threading, these zinc-plated stud bolts are precision-manufactured to meet rigorous industrial standards, making them ideal for oil and gas, petrochemical, and marine industries where reliability is non-negotiable.
✅ ASTM A320 L7 Compliance
Crafted from alloy steel grade L7, these stud bolts excel in sub-zero temperatures (down to -150°F / -101°C) and high-stress environments, ensuring toughness and impact resistance.
✅ Zinc Plated Finish
Electroplated zinc coating provides superior corrosion protection against moisture, chemicals, and saltwater, extending service life in harsh conditions.
✅ Fully Customizable
Tailor dimensions and specs to your needs:
✅ High Tensile Strength
Heat-treated to Rockwell C28–32 hardness, with a tensile strength of 150 ksi (1,034 MPa), ensuring resistance to shear, fatigue, and deformation.
✅ Global Certification
Complies with ASTM A320, ASME B16.5, ISO 898-1, and NACE MR0175 for sour service environments.
Material: ASTM A320 L7 Alloy Steel
Finish: Zinc Plated (Standard), Optional Hot-Dip Galvanized or Xylan Coating
Diameter: M6–M36 (Custom Sizes Available)
Length: 10mm (Standard), Customizable up to 500mm
Thread Standards: ISO, DIN, ANSI, or Custom
Temperature Range: -150°F to 650°F (-101°C to 343°C)
Load Capacity: Up to 1,200 MPa (Dependent on Size)
Certifications: ASTM A320, NACE MR0175, ISO 9001, ROHS
| More Detail Informations | | |
| Available Material | 1.Stainless Steel: SS303, SS304, SS316, SS410, SS420; 2.Carbon steel: C1006,C1010,C1018,C1022,C1035K,C1045; 3.Brass: C3602,C3604,Hpb59,Hpb62,Hpb65,Hpb58,Hpb70 ; 4.Aluminum: Al6061, Al6063 etc or as your requirements | |
| Head type | CSK Head,Pan Head,Truss Head,Hexagon Head,Round Head,Oval Head,Button Head,Cap Head,Cheese Head,etc. | |
| Hardness | Carbon Steel:HRC:28~35 ,HV450~700 Alloy Steel:HRC:32~39(grade10.9) HRC:39~44(grade12.9) | |
| Finish | Zinc plated, Nickel plated, Bronze, Copper,Phosphate, Oxidation black, Passivation, Tin, Dacromet, Gold, Chrome, Silver, Phosphorization,Zinc-nickel alloy plated etc. | |
| Sample Available | The sample is free of charge if we have the existing tooling,you only need to pay for the freight cost | |
| Delivery time | Samples time 3-5 working days, Lead time 20-25 working days | |
| Pricing Term | EXW Dongguan(FCA),FOB, CIF, CNF, DDU,etc. | |
| Packing | Bulk in PE bag or Small boxes.then in carton .pallet | |
| Payment term | TT (30% in advance as deposit, balance before delivery) , L/C, Western Union,PayPal etc | |
| Management system | ISO9001:2015 | |
| Certificate | ISO,ROHS | |