
Engineering & Construction
Excellence in quality. Purpose-designed Fasteners for Harsh Engineering & Construction Applications
Bolts for the oil and chemical industries vary widely, including connection bolts for pipes and lock bolts for heat exchangers. Some, such as L7 and L7M, are designed for extreme low temperatures down to -196℃. We also offer torque-type tightening bolts (F10T, GR 19.9) for steel structures like bridges and towers, along with anchor bolts made from A36, F1554, and B7 for structural support.
For Engineering & Construction
Production Scope
- CNC Lathes
- Hot Forging : M10 - M100 (3/8 in. ~4 in.)
- Thread Rolling : M6 - M100 (1/4 in. ~ 4 in.)
- Band and Circular saw
Materials
- Structural Steel : JIS SS400, ASTM A36, A307, A325, A490
- Carbone Steel : S10C - S45C
- Alloy Steel : SCM 440, A193 Gr.B5, B7, B7M, B16, A320 Gr.L7, L7M, L43, A437 Gr. B4B, 20CrMoVTiB-10, etc.
- Heat Resistance Steel : ASTM A453 - 660, A564 - 630, C276, etc.
- Stainless Steel : A193 Gr.B8 CL.1&2, B8M CL.1&2, B8T, B8C, B6, SS317(L), SS321, etc.
- Duplex Stainless Steel : UNS No.: S31803, S32205, S32750, S32760, etc.
- Super Alloy Steel : MONEL K-400/K-500, INCONEL 625/718, TITANIUM Gr. 2, 5 ,7, NIMONIC, etc.
Applicable Standards
- ASME SECTION II PART A, B
- ASTM : A36, A182, A193, A194, A240, A276, A307, A320, A325, A449, A479, A490, A563, A574, F436, F844, B16, B462, B865, F1554, etc.
- ASME : B1.1, B1.13M, B18.2.1, B18.2.2, B18.3, B18.6.3, B18.2.3.5~7M, B18.2.4.1~6M, B18.3.1~6M, etc.
- BS : 3643-1, 3692, 4320, 14399
- JIS : B1051, B1052, B1173, B1175, B1178, B1180, B1181, B1189, etc.
- DIN : 912, 931, 933, 934, 936, 6914, 6915, 6916, 912, 125, 127, etc.
- ISO: 898-1, -2, 4014, 4032, 4762, etc.
- Customer Drawing and Specification
Surface Treatment
- Electric Galvanization: ASTM B633
- Hot-dip zinc coating: ASTM A153
- Mechanical Galvanization: ASTM B695
- PTFE (Teflon) Coating
- Acid Surface Treatments
- Phosphate Coating
- GEOMET Coating
- Delta-Tone & Seal Coating
- Xylan Coating
- Other Required Treatments
Broad Spectrum of Material
We offer a comprehensive range of materials — from carbon and alloy steels to stainless, duplex, and high-performance superalloys — to meet the diverse requirements of infrastructure, civil works, and industrial facilities.
Durability And Strength
Designed for structural integrity and long-term performance, our fasteners ensure high strength and exceptional fatigue resistance — even under extreme mechanical stress and environmental exposure.
Customization
We specialize in tailor-made fasteners that align precisely with your project drawings, technical specifications, and construction timelines — ensuring smooth integration and zero compromise.
A Purpose-Built Process
for Your Project Success
Trusted Expertise for Every Industry
Our Approach to Maintaining Excellence in Quality
Quality Inspection
Every incoming material is thoroughly inspected, each process is monitored through in-process quality checks, and all products undergo a final inspection with full documentation before shipment.
Training Program
We conduct rigorous training and internal review program covering international standards, safety and technical skills ensuring that our capabilities improve after every project.
Traceable Process
Our traceability system integrates designated operations, color-coded material handling, and detailed lot numbering to ensure complete product separation, immediate issue tracking and continuous quality monitoring.







