Internal Hex Socket Bolts
For structural joints requiring high tensile strength, compact head clearance, and a clean, flush appearance, our Internal hex socket bolts are the industry-preferred choice. Featuring a deep, precision-formed hexagonal drive socket, these bolts allow for the application of high torque using standard Allen keys or hex-drive power tools, preventing the rounding and stripping issues common with Phillips or slotted drives.
For structural joints requiring high tensile strength, compact head clearance, and a clean, flush appearance, our Internal hex socket bolts are the industry-preferred choice. Featuring a deep, precision-formed hexagonal drive socket, these bolts allow for the application of high torque using standard Allen keys or hex-drive power tools, preventing the rounding and stripping issues common with Phillips or slotted drives. We manufacture our Internal hex socket bolts from high-grade alloy steel, carbon steel, and premium stainless steel, making them ideal for heavy machinery, automotive engines, solar racking, and precise CNC equipment. Our strict control over the cold-heading and thread-rolling processes ensures that each bolt exhibits high fatigue strength, clean thread profiles, and excellent load-bearing capacity under static and dynamic forces.
Operating from our certifiedwafer Waigang Town industrial park facility in Jiading District, Shanghai, we have supplied premium-grade fasteners to international markets for over 20 years. Our production lines are equipped with advanced automated multi-station cold headers and high-precision thread rollers, operating under a comprehensive ERP system to track every batch from raw wire rod to finished product. We are certified to IATF 16949:2016, which governs our rigorous QA/QC operations, including optical sorting, hardness testing, and microstructural analysis. Our Internal hex socket bolts are fully compliant with environmental protection acts, utilizing eco-friendly, hexavalent-chromium-free zinc plating, blackening, and clean passivation techniques. We work directly with global distributors, purchasing agents, and OEMs, providing them with reliable manufacturing schedules, customized packaging, and direct engineering support.
Product Parameters
|
Material |
Carbon Steel (Grade 8.8, 10.9, 12.9), Stainless Steel (A2-70/SUS304, A4-80/SUS316) |
|
Size Range |
M3 to M16 |
|
Surface Treatment |
Black Oxide, Zinc Plating, Clean/Passivated, Geomet, Dacromet |
|
Head Style |
Cylindrical Socket Head, Button Head, or Flat/Countersunk Head |
|
Drive Type |
Internal Hexagonal Socket (Allen Drive) |
|
Standard Compliance |
DIN 912, ISO 4762, ANSI B18.3, JIS B1176 |
Product Applications
Machinery & CNC Equipment
Precision linear rails, motor mounts, gearbox casings, and automated assembly arms.
Automotive Industry
Engine block assemblies, suspension brackets, transmission housings, and interior framing.
Solar Photovoltaic Racking
Aluminum frame connections, structural panel mounts, and tracker drive assemblies.
Server Cabinets & Heavy Enclosures
Heavy-duty server racks, outdoor telecom cabinets, and power generator housings.
Customization Capabilities
We support extensive OEM and ODM customization for non-standard Internal hex socket bolts, including custom thread pitches, modified head heights, dog points, and specialized captive washer grooves. Our in-house engineering department can review your technical prints and develop working prototypes within 30 days. Stock samples of standard sizes are provided completely free of charge to prospective clients. For cold-headed items, our MOQ is 50,000 pieces, while CNC-machined parts are customized according to the physical dimensions of the part.
Packaging & Shipping
All export orders are securely packed inside high-strength cardboard boxes with protective plastic liners to prevent oxidation. These boxes are packed in outer master cartons, securely banded on wooden pallets, and wrapped in protective stretch film. We execute all shipping under EXW and FOB Shanghai terms, accepting USD payment to ensure seamless customs processing and rapid transit.
Why Our R&D and Fast Delivery Help You
We have our own R&D team. You can share your special needs. We will help solve your technical problems. Free samples are ready for stock items. Mass production takes 2-3 weeks for standard parts. Custom products take 4 weeks. Repeat orders are even faster. The elongation rate for 65MN is ≥10%. So the washer will not crack during installation. It works with regular bolts, high-strength bolts, and stainless steel bolts. You do not need to change your tools.
The entire product line is fully customizable.
FAQ
Q: How do you ensure the mechanical strength of Grade 10.9 or 12.9 high-tensile bolts?
A: We utilize precision controlled heat-treatment processes to achieve the precise tensile and yield strengths required by Grade 10.9 and 12.9 specifications. Every batch is verified using our calibrated hardness testers and tensile testing equipment, and we can provide complete material test reports (MTR) upon request.
Q: Do you provide regular progress updates during the production cycle?
A: Yes, our customer service and order tracking specialists provide regular updates, including real-time photos and video clips of your order progressing through the cold heading, threading, heat treatment, and packaging stages.
Q: Is your factory compliant with local environmental laws?
A: Yes, our factory fully complies with all local and national environmental protection regulations in Shanghai. We employ clean manufacturing processes and only use eco-friendly plating chemicals that meet RoHS and REACH standards.
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