Carbon steel cross countersunk bolt

Phillips countersunk bolt, also known as cross recessed flat head bolt, is widely used for flush surface fastening in mechanical assemblies, structural components, and industrial equipment where a smooth finished surface is required.

ZSD Screw specializes in manufacturing high-strength carbon steel Phillips countersunk bolts designed for secure fastening and precise installation performance. By integrating in-house production with strict quality control systems, ZSD Screw delivers international-standard fasteners directly to global customers, ensuring consistent dimensional accuracy and stable mechanical properties.

Standard Phillips countersunk bolt dimensions are manufactured according to DIN, ISO and ASTM standards. Custom drawings and samples are accepted.

Type: Phillips Countersunk Bolt
Diameter Range: M2 – M64
Length Range: 8 mm – 300 mm
Thread Type: Metric / UNC / UNF
Thread Form: Full Thread / Partial Thread
Standard: DIN 965 / ISO 7046 / ANSI B18.6.3
Tolerance: According to standard or customer drawing.
We supply Phillips countersunk bolts in a wide range of materials including: Carbon Steel (Q235, 35#, 45#) Alloy Steel (40Cr, SCM435, SCM440) Stainless Steel (304, 316, 316L) Brass, Aluminum and Titanium (on request)

Strength Grades: Phillips countersunk bolts are available in different strength grades to meet various load requirements: 4.8, 8.8, 10.9, 12.9.14.9.  ASTM grades: ASTM A307.  Heat treatment is completed in-house to ensure stable mechanical properties and reliable performance.

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. Zinc flake coating. Phosphate. Dacromet. Special surface treatments are available according to customer requirements.

Applications: In mechanical equipment manufacturing, ZSD Screw carbon steel Phillips countersunk bolts are widely used for assembling equipment covers, structural panels, mounting brackets, and machine components where flush installation is required. The countersunk head design allows the bolt head to sit level with or below the surface, improving assembly aesthetics and reducing interference with moving parts. Stable tensile strength and precise thread forming ensure reliable preload under vibration and cyclic loading.

In electronic equipment and industrial electronics, carbon steel Phillips countersunk bolts are applied in control cabinets, enclosures, panel assemblies, and precision housings. The flush head structure supports compact design requirements and maintains alignment accuracy in electrical and industrial control systems.

In the new energy sector, carbon steel Phillips countersunk bolts from ZSD Screw are used in photovoltaic equipment panels, inverter housings, battery enclosures, and supporting structures where smooth surface installation is required. Controlled material selection and surface treatment processes enhance corrosion resistance and ensure long-term durability under outdoor exposure and temperature variation.

In conventional and renewable power generation facilities, these bolts are applied in equipment panels, auxiliary system covers, electrical mounting structures, and structural assemblies. Reliable fastening performance supports structural stability under operational vibration and mechanical stress.

In the automotive and transportation industries, ZSD Screw carbon steel Phillips countersunk bolts are used in body panels, interior structures, trim assemblies, and component mounting systems where flush surface fastening is required. Consistent strength performance and dimensional accuracy contribute to safe and stable vehicle assembly under dynamic operating conditions.

In heavy industry and engineering equipment manufacturing, these bolts are widely applied in machinery covers, structural frames, equipment housings, and steel assemblies requiring smooth external surfaces. Applications such as industrial processing equipment, fabrication systems, and structural installations require dependable fastening and stable load distribution. ZSD Screw supplies fastening components designed to maintain long-term structural integrity and operational reliability in demanding industrial environments.