Metallics Round Head Combo Machine Screw 3/8-16 x 3/4" Steel Zinc Slotted Phillips

Metallics Industries Round Head Combo Machine Screw 3/8-16 x 3/4" Steel Zinc Slotted Phillips

Professional Dual-Drive Fastener Solution

The Metallics Industries Round Head Combo Machine Screw 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. Metallics was the first fastener company in America to offer a full line of combo drive screws in 1985, establishing the industry standard for dual-drive convenience.

Professional Features & Benefits

Dual-Drive Performance

• Combo Slotted/Phillips Drive Design - Two drives in one head provide maximum installation flexibility and tool compatibility for diverse job site requirements
• 3/8-16 Thread Specification - Precision 16 threads per inch ensure secure engagement and reliable holding power in threaded applications
• 3/4" Length Construction - Optimal length for standard electrical and mechanical assembly applications with proper thread engagement
• Round Head Profile - Professional appearance with 0.67-0.708" head width provides excellent bearing surface and torque distribution

Material & Construction Excellence

• Steel Zinc Material Construction - AISI 1006-1022 steel with zinc finish provides superior corrosion resistance and durability
• Rockwell B70-B100 Hardness - Engineered hardness specification ensures optimal strength without brittleness for reliable performance
• 60,000 PSI Minimum Tensile Strength - High-strength construction withstands demanding mechanical loads and vibration

Professional Installation Advantages

• Precision Threading - Machine thread design provides accurate fit in tapped holes and threaded assemblies
• Driver Size #4 Compatibility - Standard driver size ensures compatibility with common installation tools and bits
• Quality Jar Packaging - Professional packaging maintains screw condition and provides convenient dispensing for job sites

Technical Specifications

Thread Size: 3/8-16, Length: 3/4", Material: Steel Zinc, Finish: Zinc, Head Type: Round, Drive Type: Slotted/Phillips Combo, Head Width: 0.67-0.708", Head Height: 0.237-0.256", Driver Size: #4, Material Standard: AISI 1006-1022, Hardness: Rockwell B70-B100, Tensile Strength: 60,000 PSI minimum, Phillips Recess Depth: 0.202-0.228", Phillips Recess Diameter: 0.374-0.387", Slot Depth: 0.117-0.155", Slot Width: 0.081-0.094", Pack Type: Jar, Weight: 3.43 lbs

Installation & Usage

1. Select appropriate tapped hole or threaded assembly matching 3/8-16 thread specification
2. Choose slotted or Phillips drive based on available tools and access requirements
3. Insert screw into threaded hole ensuring proper thread alignment and engagement
4. Apply steady rotational force using #4 driver size tool for consistent installation
5. Tighten to appropriate torque specification based on application requirements and material
6. Verify secure engagement and proper seating of round head against mounting surface

Professional Applications

Ideal for:

• Electrical Panel Assembly - Secure mounting of components, switches, and control devices in electrical enclosures
• HVAC Equipment Installation - Fastening of control panels, access covers, and mechanical components in heating and cooling systems
• Plumbing Fixture Mounting - Assembly of valve components, pipe supports, and plumbing hardware installations
• Industrial Equipment Assembly - Machine component fastening and mechanical assembly applications requiring reliable threading
• Control Cabinet Construction - Mounting of electrical components, terminal blocks, and wiring accessories
• Mechanical Assembly Projects - General purpose fastening in threaded applications requiring dual-drive convenience
• Maintenance and Repair Work - Replacement fastening for existing installations with combo drive accessibility
• Commercial Construction - Professional fastening solutions for electrical, mechanical, and plumbing trade applications

Steel Zinc Construction Advantage

The steel zinc construction provides exceptional corrosion resistance and durability for indoor and outdoor applications. The zinc finish offers superior protection against moisture and environmental factors while maintaining the strength characteristics of quality steel construction. This material combination ensures long-term reliability in electrical, plumbing, and HVAC installations where both strength and corrosion resistance are essential for professional performance.

Why Choose Metallics Industries Quality?

Metallics Industries pioneered the combo drive screw design in 1985, establishing the industry standard for dual-drive convenience and professional installation flexibility. Our commitment to precision manufacturing, quality steel and zinc materials, and reliable performance makes us the trusted choice for contractors, electricians, and industrial professionals. Each machine screw undergoes comprehensive quality testing to ensure consistent threading, proper hardness, and dependable performance in demanding electrical, plumbing, and HVAC applications, delivering the engineering excellence and material quality that professionals require for critical installations.