Metallics Machine Screw 3/8-16 x 1-1/4" Round Head Combo Steel Zinc

Metallics Industries Machine Screw 3/8-16 x 1-1/4" Round Head Combo Steel Zinc

Professional Dual-Drive Fastener Solution

The Metallics Industries Machine Screw 3/8-16 x 1-1/4" Round Head Combo delivers exceptional performance 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
• 3/8-16 Thread Specification - Precision 16 threads per inch provide secure engagement and reliable holding power for demanding applications
• 1-1/4" Length - Optimal length for standard electrical panel, equipment mounting, and industrial assembly applications
• Round Head Profile - Professional round head design with 0.67-0.708" width provides excellent bearing surface and finished appearance

Material & Construction Excellence

• Steel Zinc Construction - AISI 1006-1022 steel with zinc finish provides superior corrosion resistance and durability
• Professional Hardness Rating - Rockwell B70-B100 hardness ensures optimal strength without brittleness for reliable performance
• 60,000 PSI Minimum Tensile Strength - Exceeds industry standards for demanding electrical and industrial applications

Installation Versatility

• Dual Tool Compatibility - Works with both slotted and Phillips drivers for maximum installation convenience
• Precision Threading - Machine thread design ensures consistent engagement in tapped holes and threaded components

Technical Specifications

Thread Size: 3/8-16, Length: 1-1/4", Material: Steel Zinc, Material Standard: AISI 1006-1022, Finish: Zinc, Drive Type: Slotted/Phillips Combo, Head Type: Round, Head Height: 0.237-0.256", Head Width: 0.67-0.708", 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: 4.47 lbs

Installation & Usage

1. Select appropriate tapped hole or threaded component matching 3/8-16 thread specification
2. Choose either slotted or Phillips driver based on available tools and access requirements
3. Insert screw into threaded hole and begin threading by hand to prevent cross-threading
4. Use appropriate driver to tighten screw, ensuring proper torque without over-tightening
5. Verify secure engagement and proper seating of round head against mounting surface
6. Check final installation for proper alignment and secure fastening

Professional Applications

Ideal for:

• Electrical Panel Assembly - Secure mounting of electrical components, switches, and control devices in panels and enclosures
• Equipment Mounting - Professional installation of electrical equipment, junction boxes, and industrial machinery components
• HVAC System Installation - Reliable fastening for heating, ventilation, and air conditioning equipment and ductwork connections
• Plumbing Applications - Secure mounting of plumbing fixtures, pipe supports, and system components
• Industrial Assembly - Machine assembly, equipment maintenance, and industrial component installation
• Control Cabinet Work - Installation of electrical controls, switches, and instrumentation in industrial cabinets
• Maintenance Operations - Equipment repair, component replacement, and system maintenance applications
• Commercial Construction - Professional fastening solutions for commercial electrical and mechanical installations

Steel Zinc Construction Advantage

The steel zinc construction provides exceptional corrosion resistance and durability for demanding electrical and industrial environments. The zinc finish offers superior protection against moisture and environmental factors while maintaining excellent conductivity properties essential for electrical applications. The AISI 1006-1022 steel base material ensures optimal strength-to-weight ratio and reliable performance under stress.

Why Choose Metallics Industries Quality?

Metallics Industries has been the pioneer in combo drive technology since 1985, being the first fastener company in America to offer a complete line of dual-drive screws. Our commitment to precision manufacturing ensures consistent thread quality, accurate head dimensions, and reliable performance. Each machine screw undergoes comprehensive quality testing to meet stringent tensile strength requirements and dimensional standards. Professional contractors, electricians, and industrial technicians trust Metallics Industries for dependable fastening solutions that deliver consistent results in electrical, plumbing, HVAC, and construction applications, backed by decades of engineering excellence and manufacturing expertise.