Customized ISO Certified Non-standard Large Truss Head Step Shoulder Bolts for Turning
Product Overview
Our ISO-Certified Non-Standard Large Truss Head Step Shoulder Bolts are engineered for industrial applications requiring robust alignment, high torque resistance, and tailored specifications. Featuring a wide truss head for superior load distribution, a precision-machined step shoulder for smooth rotational performance, and full ISO compliance, these bolts are ideal for turning machinery, automotive drivetrains, heavy equipment, and aerospace systems. Customizable dimensions, materials, and finishes ensure seamless integration into your unique design.
Key Features
✅ ISO-Certified Quality
- Compliant with ISO 14583 (truss head screws) and ISO 4014 (hex bolts) for dimensional and mechanical reliability.
- Full Traceability: Material certifications and test reports provided for quality assurance.
✅ Large Truss Head Design
- Wide Load Distribution: Reduces surface pressure, preventing damage to soft or composite materials.
- Low-Profile & Sloped Sides: Minimizes protrusion while maximizing grip for secure fastening.
✅ Precision Step Shoulder
- Unthreaded Shoulder: Provides a smooth bearing surface for bushings, bearings, or rotating assemblies.
- Exact Alignment: Ensures concentricity in high-speed rotational applications (e.g., lathes, gearboxes).
✅ Non-Standard Customization
- Tailored Dimensions: Shoulder diameter (10mm–100mm), thread length (20mm–500mm), and total length (50mm–1,000mm).
- Material Options: Alloy steel (Grade 8.8/10.9), stainless steel 316, or titanium for extreme environments.
✅ Durable Finishes
- Zinc Plating (Blue/Black): Corrosion resistance for general industrial use.
- Dacromet® or Xylan® Coating: Heat and chemical resistance for automotive/aerospace applications.

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More Detail Informations
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Available Material
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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 |
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Head type
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CSK Head,Pan Head,Truss Head,Hexagon Head,Round Head,Oval Head,Button Head,Cap Head,Cheese Head,etc.
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Hardness
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Carbon Steel:HRC:28~35 ,HV450~700
Alloy Steel:HRC:32~39(grade10.9) HRC:39~44(grade12.9) |
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Finish
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Zinc plated, Nickel plated, Bronze, Copper,Phosphate, Oxidation black, Passivation, Tin, Dacromet, Gold, Chrome, Silver,
Phosphorization,Zinc-nickel alloy plated etc. |
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Sample Available
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The sample is free of charge if we have the existing tooling,you only need to pay for the freight cost
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Delivery time
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Samples time 3-5 working days, Lead time 20-25 working days
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Pricing Term
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EXW Dongguan(FCA),FOB, CIF, CNF, DDU,etc.
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Packing
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Bulk in PE bag or Small boxes.then in carton .pallet
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Payment term
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TT (30% in advance as deposit, balance before delivery) , L/C, Western Union,PayPal etc
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Management system
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ISO9001:2015
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Certificate
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ISO,ROHS
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Why Choose Us?
✅ OEM/ODM Support: Full custom packaging, branding, and documentation.
✅ Quality Assurance: ISO 9001-certified with full material traceability and testing (salt-spray, torque, tensile).
✅ Flexible MOQs: Prototype batches to large-scale production.
✅ Fast Turnaround: 10–15 days for standard orders; expedited options available.


A1: Our main products are Electronic screws,Sems screws,Tapping screws,Chicago screws,Shoulder screws etc. Special Non-standard studs,Turning parts and High-end precision complex CNC Machining parts etc.
A2: Carbon Steel, Alloy Steel, Aluminum alloy,Stainless Steel, Brass, Copper ,Titanium alloy or according to your requirement.
A: We usually offer you a quotation within 12 hours, and the special offer is not more than 24 hours.Any urgent cases, please contact us directly by phone or send email to us.
A: If the weight of goods more than 80kg,Normally we use shipment to transprot the orders. It is about 20-30days . If the weight of goods less than 80kg,or there are urgent, we can send the goods via air express,It is 3~5 days.
Q4: What's your packing?What to do in case of damaged goods during transport?
A1: Our Normal packing is bulking in Cartons, less than 20 kgs/carton, 48 cartons / pallet. We also can pack products according to your requirement.
A2: To avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don't forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest.
A: Yes, for big order, frequent customers, we give reasonable discounts.
A: Our production equipment is a new imported equipment. We have a group of skilled workers who have been working for more than 10 years. Their production experience is very rich and their skills are very skilled. The screws can be 30 million pcs/month. We have sufficient funds to ensure the normal operation of the factory.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.









