External Hex Bolts
We take an M10×1.5 at grade 8.8 as an example. The recommended torque is 40-50 N·m. It creates about 15-18 kN of preload force. This is enough to lock most mechanical structures. The size range is M4 to M16. We have grade 4.8, 8.8, and 10.9. Grade 4.8 has tensile strength ≥400 MPa.
Get High Torque with Our External Hex Bolts
Do you work on steel structures or bridge projects? You need a strong and common bolt. Our External Hex Bolts are the main choice for industrial assembly. The hex head lets you use a standard wrench. You can apply a lot of torque. We are a Shanghai factory. We have made fasteners for 20 years.
Check Our Torque Data and Strength Grades
We take an M10×1.5 at grade 8.8 as an example. The recommended torque is 40-50 N·m. It creates about 15-18 kN of preload force. This is enough to lock most mechanical structures. The size range is M4 to M16. We have grade 4.8, 8.8, and 10.9. Grade 4.8 has tensile strength ≥400 MPa. It is good for light loads. Grade 8.8 has tensile ≥800 MPa. It works for most machines. Grade 10.9 has tensile ≥1000 MPa. It is good for high strength connections. Thread tolerance is 6g. This meets ISO 4014, DIN 931, or DIN 933. We offer stainless steel SUS304 or 316 and carbon steel SWRCH35K, SCM435, or Q235. The head width fits international standards. You can use open wrenches, box wrenches, socket wrenches, or impact wrenches. You do not need special tools. Surface finish includes black oxide, cleaning, or zinc plating. Zinc plating comes in white, blue-white, or yellow. Salt spray test lasts 48-72 hours.
|
Parameter |
Standard / Value |
|
Recommended Torque (M10, 8.8) |
40-50 N·m |
|
Preload Force (M10, 8.8) |
15-18 kN |
|
Tensile Strength (8.8 grade) |
≥ 800 MPa |
|
Head Squareness to Shaft |
≤ 0.15 mm |
Why Our Follow-up Service Helps You
We have order trackers. They follow every step from your first price inquiry to delivery at your warehouse. If your customer has assembly problems, we have a person to talk and solve it. Warranty depends on the industry. We have many product types. We can talk about the details. When you use a spring washer or nylon lock nut, the residual clamp force stays ≥70%. This is based on ISO 16130. Our external hex bolts give you a strong and reliable connection.
The entire product line is fully customizable.
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