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Engineered for secure, durable threads, Thread Rolling Screws Slotted Indented Hex Washer Head are made from 410 stainless steel. This Tri-Lobe drive screw serves as an excellent Taptite screws alternative, sized 1/4-20 x 1/2" for pre-drilled materials that form robust threads without tapping. Thread-rolling technology creates strong, wear-resistant threads that improve vibration resistance and load transfer. 410 stainless steel offers corrosion resistance and durability for indoor or outdoor environments. Slotted Indented Hex Washer Head provides flush seating and a wide bearing surface for even load distribution. Tri-Lobe drive enhances torque transfer while reducing cam-out, ideal for high-torque assemblies. Size and compatibility – 1/4-20 UNC x 1/2" length, ready to form threads in pre-drilled materials without tapping; compatible with common fastener grids. Alternative to Taptite self-forming screws for reliable, pre-tapped performance. Electronics enclosures Automotive components Machinery Appliances Other assemblies requiring strong, corrosion-resistant fasteners Material: 410 Stainless Steel Head style: Slotted Indented Hex Washer Head Drive: Tri-Lobe Thread pitch: 1/4-20 UNC Length: 1/2 inch Upgrade your fastener collection with these Thread Rolling Screws—combining strength, corrosion resistance, and a secure drive for dependable assemblies.