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

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

Professional Dual-Drive Fastener Solution

The Metallics Industries Machine Screw 1/4-20 x 1" 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 Combo Design - Features both slotted and Phillips drive options in one head for maximum installation flexibility and tool compatibility
• 1/4-20 Thread Specification - Provides secure threading with 20 threads per inch for reliable fastening in electrical panels and equipment assemblies
• Steel Zinc Construction - Delivers superior strength with corrosion-resistant zinc finish for long-lasting performance in demanding environments
• 1" Fastener Length - Optimal length for standard electrical box installations and equipment mounting applications

Professional Installation

• Versatile Drive Options - Compatible with both slotted and Phillips drivers for enhanced installation convenience and tool availability
• Round Head Profile - Provides professional finished appearance with secure clamping force for electrical and mechanical assemblies
• Precision Threading - Machine thread design ensures consistent engagement and reliable holding power in threaded holes

Technical Specifications

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

Installation & Usage

1. Select appropriate threaded hole or tap hole to 1/4-20 thread specification
2. Choose slotted or Phillips driver based on available tools and access requirements
3. Insert machine screw through component and align with threaded hole
4. Begin threading by hand to ensure proper thread engagement and prevent cross-threading
5. Tighten with appropriate driver to secure connection without over-torquing
6. Verify proper seating and clamping force for reliable mechanical connection

Professional Applications

Ideal for:

• Electrical Panel Assembly - Securing components, switches, and devices in electrical enclosures and control panels
• Equipment Mounting - Fastening electrical equipment, junction boxes, and conduit accessories to threaded mounting points
• HVAC System Installation - Mounting thermostats, controls, and access panels in heating and air conditioning systems
• Plumbing Applications - Securing valve assemblies, pipe supports, and plumbing fixtures with threaded connections
• Industrial Assembly - General machine assembly and equipment maintenance requiring reliable threaded fasteners
• Control Cabinet Work - Installing switches, indicators, and control devices in industrial control cabinets
• Maintenance Operations - Replacement fastener for equipment servicing and component replacement
• Commercial Construction - Professional fastening solutions for electrical and mechanical installations

Steel Zinc Construction Advantage

The steel zinc construction provides exceptional strength and corrosion resistance for demanding electrical and industrial applications. The zinc finish offers superior protection against moisture and environmental factors while maintaining the strength characteristics required for reliable mechanical connections. This material combination ensures long-term performance in electrical panels, HVAC systems, and industrial equipment where both strength and corrosion resistance are critical.

Why Choose Metallics Industries Quality?

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