Metallics Machine Screw 1/4-20 x 3/4" Round Head Combo Steel Zinc

Metallics Industries Machine Screw 1/4-20 x 3/4" Round Head Combo Steel Zinc

Professional Dual-Drive Fastener Solution

The Metallics Industries Machine Screw 1/4-20 x 3/4" Round Head Combo delivers exceptional versatility and reliability for electrical, plumbing, and HVAC applications. This steel zinc machine screw provides dependable fastening solutions designed for professional contractors, electricians, and industrial technicians, offering the proven quality and precision engineering that professionals trust from a leading manufacturer of electrical hardware and industrial fasteners.

Professional Features & Benefits

Dual-Drive Performance

• Round Head with Slotted and Phillips Drive - Two drives in one head provide maximum installation flexibility and tool compatibility for diverse field conditions
• 1/4-20 Thread Specification - Standard machine thread design ensures reliable engagement and holding power for equipment assembly and maintenance applications
• 3/4" Length Design - Optimal length for standard electrical panel, equipment mounting, and industrial assembly applications
• Steel Zinc Construction - AISI 1006-1022 steel with zinc finish provides excellent corrosion resistance and durability for indoor and outdoor installations

Professional Installation Advantages

• Combo Drive Versatility - Compatible with both slotted and Phillips drivers, ensuring installation flexibility in tight spaces and varied tool availability
• Round Head Profile - Low-profile head design provides clean finished appearance while maintaining strong bearing surface for reliable clamping force
• Precision Threading - 20 threads per inch specification ensures smooth engagement and consistent torque application for professional installations

Material & Construction Excellence

• High-Strength Steel Base - 60,000 psi minimum tensile strength with Rockwell B70-B100 hardness provides reliable performance under demanding conditions
• Zinc Finish Protection - Corrosion-resistant zinc coating extends service life in electrical, plumbing, and HVAC environments

Technical Specifications

Material: Steel Zinc, Material Standard: AISI 1006-1022, Thread: 1/4-20 (20 threads per inch), Length: 3/4", Drive Type: Slotted/Phillips Combo, Driver Size: #3, Head Type: Round, Head Height: 0.16-0.175", Head Width: 0.443-0.472", Finish: Zinc, Tensile Strength: 60,000 psi minimum, Hardness: Rockwell B70-B100, Phillips Recess Depth: 0.121-0.147", Phillips Recess Diameter: 0.255-0.268", Slot Depth: 0.082-0.109", Slot Width: 0.064-0.075", Pack Type: Jar, Weight: 1.235 lbs

Installation & Usage

1. Select appropriate pre-drilled or tapped hole matching 1/4-20 thread specification
2. Choose slotted or Phillips driver based on access requirements and tool availability
3. Insert screw through mounting hardware or component to be secured
4. Engage threads by hand to prevent cross-threading and ensure proper alignment
5. Tighten using appropriate torque for application, taking advantage of 60,000 psi tensile strength
6. Verify secure engagement and proper seating of round head for optimal clamping force

Professional Applications

Ideal for:

• Electrical Panel Assembly - Securing components, switches, and mounting hardware in electrical enclosures and control panels
• Equipment Mounting - Fastening electrical devices, junction boxes, and conduit accessories to panels and mounting surfaces
• HVAC System Installation - Mounting thermostats, control panels, and system components in heating and air conditioning applications
• Plumbing Hardware Assembly - Securing valve assemblies, pipe supports, and plumbing fixtures in residential and commercial installations
• Industrial Maintenance - Equipment repair, component replacement, and machinery assembly in manufacturing and industrial facilities
• Commercial Construction - General fastening applications requiring reliable holding power and corrosion resistance
• Electrical Device Installation - Mounting switches, outlets, and electrical accessories in commercial and residential applications
• Control System Assembly - Securing control panels, instrumentation, and automation equipment in industrial settings

Steel Zinc Construction Advantage

The steel zinc construction provides superior strength and corrosion resistance for demanding electrical, plumbing, and HVAC applications. The AISI 1006-1022 steel base material delivers 60,000 psi minimum tensile strength with Rockwell B70-B100 hardness, while the zinc finish coating provides excellent protection against corrosion in indoor and outdoor environments. This combination ensures long-term reliability and performance in professional installations where durability and dependability are essential.

Why Choose Metallics Industries Quality?

Metallics Industries has been a pioneer in combo drive technology since 1985, being the first fastener company in America to offer a complete line of combination drive screws. Our commitment to precision manufacturing, quality materials and finishes, and reliable performance makes us the trusted choice for contractors, electricians, and industrial professionals. Each machine screw undergoes comprehensive quality testing to ensure consistent performance, and our specialized focus on electrical hardware and industrial fastening solutions provides the engineering excellence and dependable results that professionals demand for critical applications.