Screws & Bolts

Screws and Bolts: Essential Elements in Industrial Connections

Screws and bolts are essential fasteners widely used in various industries to create strong, reliable connections between components. The helical threads spiraling around their shafts securely engage materials or corresponding internal threads, ensuring stability and durability.

Screws typically feature sharp, aggressive threads designed for direct insertion into pre-drilled holes or various materials like wood, metal, or plastic, creating robust, semi-permanent connections.

Available in diverse designs such as self-tapping screws, machine screws, screws for plastics, and Hi-Lo screws, each type serves specific applications in industries like construction, furniture assembly, automotive manufacturing, and electronics.

Bolts, in contrast, usually have smoother and less aggressive threads, designed for use with nuts. They are ideal for applications that require easy disassembly and adjustments, commonly used in machinery assembly, automotive structures, and heavy-duty installations.

Our company specializes not only in supplying standard specification screws and bolts but also excels in customized production. With advanced manufacturing capabilities, we precisely manufacture customized fasteners according to client drawings and specifications. From selecting optimal materials and thread accuracy to dimensional tolerances, we are dedicated to delivering tailored solutions that meet diverse industrial needs, ensuring optimal performance and quality for your products.

Customize what you need

H ere are some common materials used for screws and bolts:

Specification
The most common material for screws and bolts, relatively inexpensive and suitable.
Stainless steel
304 & 316 well known for their corrosion resistance, making them an excellent choice where exposure to moisture or corrosive substances is a concern.
Alloy steel
Made from steel combined with other elements to enhance its mechanical properties, including strength and hardness.
Brass
Corrosion-resistant, great electrical conductivity, commonly used in electrical and decorative applications.
Six lobe shaped socket
Lightweight & corrosion-resistant.
Aluminum
Lightweight and highly corrosion-resistant, where both strength and corrosion resistance are critical.

C ommon steel classes for screws and bolts include:

Class 4.8 / 5.8 / 6.8
Low to medium strength, commonly used in applications where high strength is not a primary requirement.
Class 8.8 / 10.9 / 12.9
Alloy steel, offers increasing levels of tensile and yield strength.

C ommon finish types:

Zinc
provides moderate corrosion resistance.
Copper
good corrosion resistance, and excellent conductor of electricity.
Nickel
often used for decorative purposes due to shiny appearance.
Zinc nickel
excellent corrosion resistance, and longer service life than common zinc finish.
Black oxide
a chemical finish that provides corrosion resistance and a black appearance.
Zinc Phosphate
act as a barrier against corrosion by providing a protective layer between the metal substrate and corrosive elements, such as moisture and chemicals.
Coatings per automotive standards (RoHs compliance)

T ypes of head shapes:

Flat head
Round head
Oval head
Pan head
Truss head
Cheese head
Binding head
Fillister head
Button head
Hex washer head
Hexagon head

T ypes of drives:

Hexalobular drive (ISO 10664)
Six lobe shaped socket
Phillips drive
Cross recessed type H
Pozi drive
Cross recessed type Z
Hexagon socket
Hexagonal socket in the head, often used with hex keys (Allen wrenches)
Slot drive
Single slot in the screw head
One way
To be installed easily in one direction but makes removal difficult or impossible without specialized tools. They are used for security purposes.
Tamper resistant 6 lobe
Have a pin in the center of the 6 lobe recess
External hexalobular head with small flange (DIN 34800)