When it comes to heavy-duty mechanical aluminum profile attachments, Square Flat Head Bolts (commonly engineered as T-Slot T-Bolts or Hammer Head Screws) are indispensable components that combine high tensile strength, versatility, and installation efficiency. These industrial fasteners are critical for securing structural frames, machine assemblies, and heavy vehicle components.
Founded in 2007 and located in Ningbo, Zhejiang, Ningbo Shengfa Hardware Co., Ltd. is an ISO-certified manufacturer specializing in high-precision, custom OEM/ODM hardware solutions. We provide global B2B buyers with premium flat head T-bolts that strictly comply with international industrial standards.
Our square flat head bolts are manufactured from high-tensile Carbon Steel (Grade 4.8, 8.8, 10.9) and premium Stainless Steel (SS304, SS316). To ensure long-lasting performance in high-humidity or corrosive outdoor environments, we offer advanced surface treatments including Zinc Plating (Clear/Yellow), Nickel Plating, Black Oxide, and Hot-Dip Galvanizing.
Engineered for seamless integration, our hammer head screw design allows for post-assembly installation. Users can drop the bolt directly into the aluminum profile T-slot at any position. The bolt automatically rotates 90 degrees and locks securely under torque, eliminating the need for pre-assembly teardowns.
The self-locking mechanism within the T-slot slot profile ensures a stable, flush-mount connection that resists self-loosening under dynamic or heavy loads. This makes them ideal for automated machinery, material handling conveyors, and heavy lifting equipment.
Our flat head T-bolts work seamlessly with standard industrial nuts, particularly flange nuts and hexagonal nuts, providing a flush, secure connection across various structural frame setups.
As a direct factory, we support full custom manufacturing based on your blueprints (CAD/SolidWorks) or samples:
| Parameter | Standard Specifications & Custom Ranges |
|---|---|
| Product Name | Square Flat Head Bolts / T-Slot T-Bolts / Hammer Head Screws |
| Thread Sizes | M5, M6, M8, M10, M12, M16 (Custom Inch Sizes Available) |
| Material Options | Carbon Steel, Stainless Steel (304, 316), Brass, Aluminum Alloy |
| Property Class / Grade | Class 4.8, 8.8, 10.9, 12.9 |
| Surface Finish | Zinc Plated (Cr3+), Nickel Plating, Black Oxide, HDG, Plain |
| Applicable Profiles | 20/30/40/45/50/60 Series Aluminum Extrusion T-Slots |
Perfect for fastening T-slot rails, modular framing, industrial workstations, and protective enclosures built on aluminum profile extrusions.
Widely utilized in the assembly and maintenance of heavy machinery, including conveyor systems, lifting equipment, paper mill machinery, and metallurgical processing units.
Applied in custom brackets, logistics trailers, and commercial vehicle chassis attachments where vibration resistance is critical.
Used for solar panel mounting structures and secure racking systems in commercial solar farms.
Q: What is the difference between a square flat head bolt and a standard hex bolt?
A: Unlike hex bolts, square flat head bolts feature a larger seating surface and a square neck that locks directly into T-slot profiles, preventing rotation during tightening. This makes them ideal for aluminum frame assemblies where a flush, vibration-resistant connection is required.
Q: Are these bolts suitable for outdoor or marine applications?
A: Yes. We recommend Stainless Steel (SS316) or Hot-Dip Galvanized (HDG) square flat head bolts for outdoor and marine environments, as they offer superior corrosion resistance and long-term durability.
Q: Do you provide samples before mass production?
A: Absolutely. We support free samples for evaluation. You only need to cover the shipping cost.
Q: What quality certifications does Ningbo Shengfa hold?
A: Our factory operates under ISO 9001:2015 quality management standards.
Established in 2007 in the coastal manufacturing hub of Ningbo, Zhejiang, Ningbo Shengfa Hardware operates a state-of-the-art facility specializing in CNC machining, investment casting, precision forging, and custom stamping. For nearly two decades, we have supplied high-precision components to B2B clients across North America, Europe, and Southeast Asia.
Address
Yunlong Town, Ningbo City,Zhejiang Province, China
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