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Material: Carbon steel
Standard: ANSI/ASME B 18.5 - 2008&BS 4933&JIS B 1171&GB /T 12&GB /T 14&ISO 8677&DIN 603
1.Medium-Strength Grade 5 Steel Square-Neck Carriage Bolts: Made from Grade 5 steel, these bolts are suitable for fastening most machinery and equipment. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Grade 5 steel bolts are marked with three radial lines. The material meets SAE J429 specifications for quality. Dimensions meet ASME B18.5 specifications. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion-resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. Zinc-flake-coated steel screws are 40 times as corrosion-resistant as zinc-plated screws and comparable to Magni-coated screws.
2.Medium-Strength Metric Class 8.8 Steel Square-Neck Carriage Bolts: These 8.8 steel bolts are suitable for fastening most machinery and equipment. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Length is measured from under the head.
Zinc or zinc yellow-chromate plated steel bolts resist corrosion in wet environments.
3. Low-Strength Steel Square-Neck Carriage Bolts: About half the strength of medium-strength bolts, these Grade 2 bolts are for light-duty fastening. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. The material meets ASTM A307 or SAE J429 quality specifications. The dimensions meet ASME B18.5 specifications. Length is measured from under the head.
Zinc-plated steel bolts resist corrosion in wet environments.
Hot-dipped galvanized steel bolts have a thick coating for better corrosion resistance than zinc-plated steel bolts. They meet ASTM A153 specifications for the quality of hot-dipped coatings. They’re a good choice for ACQ-treated (arsenic-free) lumber. Bolts must be used with hot-dipped galvanized steel nuts (sold separately).
4. High-Strength Grade 8 Steel Square-Neck Carriage Bolts: Made from Grade 8 steel, these bolts are at least 25% stronger than medium-strength steel bolts and can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. A square neck keeps these bolts from turning when tightening a nut. A smooth, rounded head provides a finished look. A zinc yellow-chromate plating offers corrosion resistance in wet environments. Grade 8 steel bolts are marked with six radial lines. The material meets SAE J429 specifications for quality. Dimensions meet ASME B18.5 specifications. Length is measured from under the head.
Product Specification
Name: Medium-Strength Grade 5 Steel Square-Neck Carriage Bolts&Medium-Strength Metric Class 8.8 Steel Square-Neck Carriage Bolts
Material: Carbon steel
1. Made from Grade 5 steel, these bolts are suitable for fastening most machinery and equipment. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Grade 5 steel bolts are marked with three radial lines. The material meets SAE J429 specifications for quality. Dimensions meet ASME B18.5 specifications. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion-resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. Zinc-flake-coated steel screws are 40 times as corrosion-resistant as zinc-plated screws and comparable to Magni-coated screws.
2. These Class 8.8 steel bolts are suitable for fastening most machinery and equipment. A square neck keeps them from turning when tightening a nut. A smooth, rounded head provides a finished look. Length is measured from under the head. Zinc or zinc yellow-chromate plated steel bolts resist corrosion in wet environments.
Traditional Carriage Bolts have either no head marks or a simple head mark. They also have partial threads with a whole body beyond the threads (short lengths can be fully threaded). We offer them in a traditional Black Oxide finish.
Because we can no longer find adequate supplies of old-stock traditional carriage bolts, we have started to Mill Order some of the most sought-after sizes, starting with the 3/8" diameter. Over time, we hope to add more sizes.
If you cannot find the size of the Traditional Carriage Bolt you want, please check to see if we have it in a Modern version.
Size Can also be According to the Customer's requirement for manufacturing, please check the detailed specification sheet details PDF, CAD, 153-154 Page See more product details.
Product Packaging
Packaging: The inner packaging is a plastic bag, and the outer packaging is a carton. Then the tray. Carton size: 29*19*19.5cm and 23.5*17.5*8, cm and pallet size: 215*100*90cm, or as your request.
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+86 020 3121 6067
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