Metallics Round Head Combo Machine Screw 3/8-16 x 1-1/2" Steel Zinc Slotted Phillips

Metallics Industries Round Head Combo Machine Screw 3/8-16 x 1-1/2" Steel Zinc

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.

Professional Features & Benefits

Dual-Drive Performance

• Combo Drive Design - Features both slotted and Phillips drive options in one head for maximum installation flexibility and tool compatibility
• Round Head Configuration - 0.67-0.708" head width provides optimal bearing surface and professional finished appearance
• Precision Threading - 3/8-16 thread specification ensures secure engagement and reliable holding power
• Steel Zinc Construction - AISI 1006-1022 steel with zinc finish provides excellent corrosion resistance and durability

Installation Versatility

• Dual Tool Compatibility - Install with either slotted or Phillips #4 drivers for maximum convenience
• Professional Length - 1-1/2" length ideal for securing components through standard thickness materials
• Controlled Penetration - Precise recess dimensions ensure consistent driver engagement and torque transfer

Material Excellence

• High Tensile Strength - 60,000 psi minimum tensile strength for demanding applications
• Hardness Rating - Rockwell B70-B100 hardness provides optimal strength-to-workability balance
• Zinc Finish Protection - Superior corrosion resistance for indoor and outdoor installations

Technical Specifications

Thread Size: 3/8-16, Length: 1-1/2", Material: Steel Zinc (AISI 1006-1022), Finish: Zinc, Drive Type: Slotted/Phillips Combo, Driver Size: #4, Head Type: Round, Head Width: 0.67-0.708", Head Height: 0.237-0.256", 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", Tensile Strength: 60,000 psi minimum, Hardness: Rockwell B70-B100, Pack Type: Jar, Thread Per Inch: 16

Installation & Usage

1. Select appropriate pre-drilled or tapped hole matching 3/8-16 thread specification
2. Choose either slotted or Phillips #4 driver based on installation requirements and tool availability
3. Insert screw through components ensuring proper alignment with threaded hole
4. Begin threading by hand to prevent cross-threading and ensure proper engagement
5. Tighten with appropriate driver, applying consistent torque for secure fastening without over-tightening
6. Verify final installation provides flush head seating and secure component attachment

Professional Applications

Ideal for:

• Electrical Panel Assembly - Securing components, covers, and mounting hardware in electrical enclosures
• Equipment Mounting - Attaching electrical devices, junction boxes, and control panels to structural supports
• HVAC System Installation - Fastening ductwork components, control boxes, and mounting brackets
• Plumbing Applications - Securing pipe supports, valve assemblies, and fixture mounting hardware
• Industrial Assembly - Machine component attachment and equipment housing assembly
• Maintenance Operations - Replacement fastening for existing installations requiring dual-drive compatibility
• Commercial Construction - General fastening applications requiring professional-grade hardware
• Retrofit Projects - Upgrading existing installations where driver type flexibility is essential

Steel Zinc Construction Advantage

The steel zinc construction provides exceptional durability and corrosion resistance for demanding professional applications. The AISI 1006-1022 steel base material offers excellent strength characteristics, while the zinc finish provides superior protection against environmental factors. This combination ensures long-term reliability in electrical, plumbing, and HVAC installations where consistent performance is critical.

Why Choose Metallics Industries Quality?

Metallics Industries has been pioneering innovative fastener solutions since 1985, when they became the first fastener company in America to offer a complete line of combo drive screws. Their commitment to precision manufacturing, quality materials and finishes, and reliable performance makes them the trusted choice for contractors and industrial professionals. With comprehensive product testing and proven solutions for electrical, plumbing, HVAC, and construction applications, Metallics Industries continues to deliver the engineering excellence and dependable quality that professionals demand for critical installations.