Providing robust bolts and nuts made from quality materials for reliable performance in every project.
About Karunia Utama
Karunia Utama is a leading manufacturer of high-quality fasteners and anchor bolts. With a broad spectrum of materials like Carbon Steel, Alloy Steel, and various grades such as A325, Grade 8.8, 10.9, 12.9, and standards including ASTM, JIS, and ISO, we serve diverse industries and applications. For custom bolts, clamp gratings, and bolts of all shapes and sizes, contact us for custom solutions we craft to meet your needs. Our commitment to excellence ensures that you receive reliable products that meet international standards.
Our Products
Types of product
Types of product
our international standards
treatment & finishes
tailored solutions
Lengths, diameters, and thread pitches as per specifications
Alternative steel grades and alloys
Metric (M), UNC, UNF, and others
Tensile and hardness testing, Chemical composition analysis, Non-destructive testing (NDT)
Material Test Reports (MTR). Certificates of Compliance, Third-party inspection reports upon request
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FAQs
We offer a wide range of materials, including Carbon Steel (A36, A307 Grades A-C, SS400, ST41), Alloy Steel (Grades 10.9, 12.9), and High-Strength Steels (ASTM A325, Grade 8.8).
Yes, we specialize in custom manufacturing to meet specific project requirements.
Our products comply with international standards such as ASTM, ISO, and JIS, and we provide all necessary certifications.
Jl. Sedayu City Kelapa Gading Blok A Selatan No 61,
RT.1/RW.9, Cakung Bar., Kec. Klp. Gading, Kota Jakarta Timur,
Daerah Khusus Ibukota Jakarta 13910
