Carbon steel slotted cylindrical head machine screw

Carbon steel slotted cylindrical head machine screw is a precision fastening component designed for applications requiring a tall cylindrical head profile and traditional straight-slot drive. The cylindrical (cheese head) design provides a defined bearing surface with increased head height compared to pan head screws, making it suitable for assemblies where secure clamping and tool accessibility are important. The slotted drive allows manual or controlled low-torque installation, commonly used in electrical, mechanical, and equipment panel assemblies.

ZSD Screw specialize in high-strength carbon steel slotted cylindrical head machine screws manufactured through fully integrated in-house production processes, including cold heading, precision thread rolling, controlled heat treatment, and automated surface finishing. Head height tolerance, slot depth geometry, and thread accuracy are strictly monitored to ensure proper screwdriver engagement and consistent preload performance. Each batch undergoes dimensional inspection, hardness verification, and tensile testing to ensure compliance with international fastening standards and stable mechanical properties across production lots.

Standard cylindrical head machine screw dimensions are manufactured according to DIN, ISO and ASTM standards. Custom drawings and samples are accepted.

Type: Carbon Steel Slotted Cylindrical Head Machine Screw
Diameter Range: M2 – M12
Length Range: 4 mm – 150 mm
Thread Type: Metric / UNC / UNF
Thread Form: Full Thread
Standard: DIN 84 / ISO 1207
Tolerance: According to standard or customer drawing.

We supply machine screws in a wide range of materials including: Carbon Steel (Q195, Q235, 10B21, 35#, 45#), Alloy Steel (SCM435), Stainless Steel (304, 316), Brass and Aluminum (on request).

Strength Grades: Carbon steel slotted cylindrical head machine screws are available in different strength grades to meet various load requirements: 4.8, 8.8, 10.9, 12.9, 14.9. Mechanical properties are controlled according to ISO 898-1 where applicable. Heat treatment is completed in-house to ensure stable tensile strength, uniform hardness distribution, and reliable fastening performance under static and moderate dynamic load conditions.

Surface Treatment: To improve corrosion resistance and service life, we offer the following surface finishes: Zinc plated (blue / white / yellow), Black oxide, Hot dip galvanized (for applicable sizes), Zinc flake coating, Phosphate, Dacromet. Coating thickness and adhesion performance are monitored to ensure consistent corrosion resistance. RoHS-compliant finishes are available for electronic and export markets.

Applications: In mechanical equipment manufacturing, ZSD Screw carbon steel slotted cylindrical head machine screws are used in gear housings, machine panels, control brackets, and structural covers where a defined head height supports secure clamping. The slotted drive is suitable for controlled torque applications and manual adjustment during equipment assembly. ZSD ensures slot width accuracy and head concentricity to maintain stable screwdriver engagement and prevent deformation during tightening.

In electronic equipment and industrial electronics, slotted cylindrical head screws are commonly applied in terminal blocks, switchgear panels, circuit protection devices, and grounding assemblies. The straight-slot design allows precise manual torque control during wiring installation. ZSD Screw provides RoHS-compliant surface treatments and maintains strict thread tolerances to ensure grounding reliability and consistent electrical contact performance.

In the new energy sector, these screws are used in inverter enclosures, photovoltaic junction boxes, battery module housings, and control system assemblies where moderate torque and precise positioning are required. Stable mechanical properties and corrosion-resistant coatings help ensure reliable fastening performance under temperature fluctuation and long-term operational exposure.

In conventional and renewable power generation facilities, slotted cylindrical head machine screws are applied in instrumentation panels, auxiliary control systems, and protective covers. Consistent head geometry and mechanical grade control help maintain preload stability under vibration and thermal expansion conditions. ZSD Screw supports industrial projects with traceable batch production and controlled heat treatment processes.

In the automotive and transportation industries, these screws are used in interior electrical modules, lighting assemblies, dashboard components, and control interfaces where controlled manual installation is required. ZSD maintains tight dimensional tolerances and stable mechanical property management to support consistent assembly quality in mass production environments.

In heavy industry and engineering equipment manufacturing, slotted cylindrical head screws are widely applied in machinery enclosures, equipment guards, industrial cabinets, and maintenance-access components. The cylindrical head provides durability and clear tool engagement in service environments. Through systematic inspection procedures, raw material verification, and controlled production management, ZSD Screw ensures dependable fastening reliability in demanding industrial applications.