Countersunk Self-Tapping Screws

Phillips Countersunk Self-Tapping Screws – Product Introduction

Phillips Countersunk Self-Tapping Screws are high-performance fasteners integrating self-drilling, self-tapping and concealed fastening functions, designed for efficient connection of thin metal, wood, plastic and composite materials. With a sleek countersunk head and standard Phillips drive, they can be fully embedded into the material surface after installation, achieving a flat and burr-free finish that eliminates the need for additional trimming. Crafted with high-quality materials and precision processing, these screws are widely used in hardware manufacturing, electronic equipment assembly, automotive accessories, building decoration and DIY projects, and are highly recognized by global importers, retailers and industrial users.

Core Advantages

Integrated Self-Tapping Design, No Pre-Drilling Needed: Equipped with a sharp self-tapping point and precision-threaded shank, the screws can automatically drill holes and form threads in the base material during installation, saving time and labor, and improving construction efficiency by 40% compared with ordinary screws.
Concealed Fastening, Sleek Surface Finish: The countersunk head (flat head) design fits perfectly with the material surface, no protrusions or burrs after installation, ensuring a neat and beautiful appearance, which is especially suitable for occasions requiring high surface aesthetics.
Phillips Drive, Anti-Slip and High Torque: Standard PH2 Phillips slot with deep and smooth groove design, which effectively prevents slipping during high-torque installation, ensures stable force transmission, and is compatible with most electric screwdrivers, cordless drills and manual screwdrivers on the global market.
High Hardness and Wear Resistance: Made of high-quality C1022A medium carbon steel or 304/316 stainless steel, through quenching, tempering and other heat treatment processes, the surface hardness reaches HRC45-55, the core is tough and not easy to break, and the thread is wear-resistant and not easy to slip.
Strong Versatility and Wide Adaptability: Suitable for fixing thin steel plates (≤2.0mm), aluminum plates, wood, plywood, particleboard, plastic parts and composite materials, and can be used in indoor, outdoor and moderately humid environments (depending on surface treatment).

Product Classification & Application Scenarios

Screw Type	Thread Feature	Surface Treatment	Application Scenarios
Phillips Countersunk Coarse Thread Self-Tapping Screws	Single coarse thread, wide pitch, fast self-tapping speed	Phosphating (Grey), Blue-White Zinc	Wooden furniture assembly, wooden structure fixing, DIY home decoration, plywood connection
Phillips Countersunk Fine Thread Self-Tapping Screws	Double fine threads, high density, strong thread engagement	Color Zinc, Epoxy Coating, Dacromet	Thin steel plate fixing, electronic equipment shell assembly, automotive interior accessories, electrical junction boxes
Phillips Countersunk Stainless Steel Self-Tapping Screws	Fine/coarse thread optional, corrosion-resistant and rust-proof	Natural 304/316 Stainless Steel	Outdoor light-duty fixing, bathroom and kitchen equipment installation, marine accessories, corrosion-prone environments

Key Specifications & Parameters

Parameter	Standard Value	Optional Value	International Standard
Material	C1022A Medium Carbon Steel	304/316 Stainless Steel	ANSI B18.6.4, DIN 7981, GB/T 3098.5
Surface Treatment	Phosphating (Grey), Blue-White Zinc	Color Zinc, Epoxy Coating, Dacromet, Passivation	Salt spray test ≥48 hours (zinc plating), ≥100 hours (stainless steel)
Drive Type	PH2 Phillips Slot	Pozidriv Slot, Hex Socket, Slotted-Phillips Combined	Universal design, compatible with global standard tools
Head Type	Countersunk Head (Flat Head)	Countersunk Head with Ribs, Countersunk Pan Head	Full embedding, no surface protrusion, smooth finish
Diameter	#4(2.9mm), #6(3.5mm), #8(4.2mm)	#5(3.1mm), #10(4.8mm), #12(5.5mm)	Mainstream export specifications for global markets
Length	10mm, 16mm, 20mm, 25mm, 30mm	6mm-80mm	Customizable according to bulk order requirements
Tensile Strength	≥650MPa	≥850MPa (High-Strength Type)	Meets industrial and automotive-grade fastening requirements
Self-Tapping Capacity	Can tap into ≤1.5mm thin steel plate, soft wood	Can tap into ≤2.0mm thin steel plate (High-Strength Type)	No pre-drilling, efficient installation

Comparison: Countersunk Self-Tapping Screws vs Ordinary Countersunk Screws

Comparison Item	Phillips Countersunk Self-Tapping Screws	Ordinary Countersunk Screws
Installation Requirement	No pre-drilling, self-tapping and fixing in one step	Need pre-drilling, time-consuming and labor-intensive
Applicable Materials	Thin steel, wood, plastic, composite materials	Only suitable for wood, soft materials, not for metal
Thread Engagement	Precision thread, tight engagement, not easy to loosen	Ordinary thread, loose engagement, easy to loosen after long-term use
Installation Efficiency	High, suitable for batch and efficient construction	Low, only suitable for small-scale manual operation
Cost-Effectiveness	High, saves pre-drilling labor and time costs	Low, additional pre-drilling tools and labor required

Application Scope

Hardware manufacturing: Assembly of cabinets, drawers, hardware accessories, metal brackets
Electronic & electrical industry: Fixing of electronic equipment shells, switch panels, cable brackets
Automotive industry: Installation of automotive interior accessories, plastic parts, metal decorative parts
Building decoration: Fixing of thin steel plates, aluminum gussets, decorative panels, skirting lines
DIY & home improvement: Home decoration, furniture maintenance, small-scale renovation projects
Industrial equipment: Fixing of light-duty industrial equipment accessories, instrument panels

Why Choose Our Phillips Countersunk Self-Tapping Screws?

Precision Craftsmanship: Adopt high-precision cold heading, thread rolling and heat treatment technology, ensuring the countersunk head is flat, the thread is clear, the self-tapping point is sharp, and installation is smooth without jamming.
Strict Quality Control: From raw material inspection to finished product testing, we implement full-process quality monitoring, ensuring consistent size, uniform hardness, no breakage and no slip.
Customization Service: Support customization of diameter, length, surface treatment, head type and packaging, provide OEM/ODM services to meet the personalized needs of global importers and distributors.
Export-Oriented Quality: Complies with international standards, passes tensile test, salt spray test and hardness test, with stable quality and competitive factory price, popular in Europe, America, Southeast Asia and Middle East.
Complete Supporting Services: Provide product test reports, quality certificates, customs clearance documents, and provide timely after-sales support for any quality or use problems.