Stainless Steel Special-Shaped Screws

Product Introduction

The product is made of high-strength carbon steel (8.8 grade), which has undergone heat treatment and black oxide treatment. It features excellent tensile strength (≥800MPa) and rust prevention properties. The screw head is designed with a slot and embossed structure, allowing for both tightening with a wrench and quick manual disassembly. The operation is flexible and convenient. The embossed pattern enhances friction and prevents slipping, making it suitable for vibration environments. It is widely used in mechanical equipment, electronic instruments, automotive parts, and other fields, especially in scenarios where frequent adjustment or maintenance is required. The surface is matte black, making it both aesthetically pleasing and durable. Custom sizes and strength grades are supported.

Product features

8.8 grade carbon steel material, processed through heat treatment, with tensile strength of ≥ 800 MPa, meeting the requirements of industrial-level fastening;

The head has grooves (straight/cross grooves) compatible with screwdriver operation. The embossed edges support manual tightening, allowing for quick disassembly without tools;

The surface has a black oxide layer, passed the 72-hour salt spray test, with a black matte appearance that combines corrosion resistance and aesthetic appeal;

The precise rolling patterns provide strong friction, effectively preventing tool slippage and vibration loosening;

The specification range is M3-M12, suitable for equipment in the mechanical, electronic, and automotive industries that require frequent maintenance;

There is no hydrogen embrittlement risk, and it has passed the ROHS environmental certification, with a lifespan that is three times longer than ordinary galvanized screws.

Product Application

Suitable for equipment components that are frequently disassembled, such as transmission systems and bearing housings, the embossed design facilitates quick manual adjustment, and the blackened layer is resistant to wear.

Used for parts that need to prevent loosening, such as engine brackets and gearbox covers, the 8.8 grade strength ensures stability under high loads. The grooves are compatible with standard tool operations.

For the fastening of outdoor equipment like distribution cabinets and 5G base stations, the blackening treatment enhances rust resistance, and it is suitable for humid and salt spray environments.

For the fixation of non-critical structures such as train interior components and handrails, the embossed edges prevent slipping in vibration environments and reduce the risk of loosening.

For the assembly of the enclosures of precision instruments, the black matte finish is aesthetically pleasing and reduces reflection, and manual tightening avoids damage to sensitive components.

Product advantages

It is made of 8.8 grade carbon steel, with a tensile strength of ≥800 MPa and a yield strength of ≥640 MPa. It is suitable for high-load mechanical connections. Through optimized heat treatment processes, it enhances fatigue resistance and prolongs service life. Compared to ordinary screws, its durability is improved by 3 times.

Groove (straight/cross groove): Facilitates quick installation with a screwdriver, enhancing assembly efficiency. The embossed edge increases the friction for manual tightening, allowing for adjustment without tools, suitable for narrow spaces or emergency repairs.

Blackening and oxidation treatment on the surface, resistant to salt spray for over 72 hours. Its corrosion resistance is superior to that of ordinary galvanized screws. The matte black appearance reduces reflection, suitable for military, precision instruments, etc., which require concealment.

The embossed design increases grip friction, preventing tool slippage, reducing the risk of installation damage, and the high-precision threads (6g grade) combined with anti-loosening structures ensure no loosening in vibration environments.

The specifications cover M3-M12, suitable for various industries such as machinery, automobiles, and power equipment. Customization is supported (such as special lengths, strength grades), meeting personalized application scenarios.

FAQ

Q1: What are the functions of the grooves and the knurled design?

A1: The grooves can provide a specific installation method for screws or be used in conjunction with other components. For example, a straight groove or a cross groove is convenient for screwdrivers to tighten, while an internal hexagonal groove is suitable for internal hexagonal wrenches. The main function of the knurled design is to increase the friction on the screw surface, facilitating manual tightening and loosening, and also preventing the screw from loosening due to vibration or other reasons during use.

Q2: In which scenarios are these screws commonly used?

A2: They are commonly used in equipment that requires manual adjustment or frequent disassembly (such as instruments, furniture, mechanical components), and in situations where anti-slip is required (such as handles, knobs, adjusting screws).

Q3: Does the knurled design affect the mechanical properties of the screw?

A3: The knurled design is usually processed in non-load-bearing areas (such as the head or the end of the shaft of the screw), and does not affect the overall strength.

Q4: Can non-standard sizes or special requirements be customized?

A4: Customization is supported, but the following information must be provided: drawings or detailed specifications (knurled type, groove type, length, diameter, etc.)

Special-Shaped Screws

Custom-Made Special-Shaped Screws