Product Category: Products Self-Clinching Fasteners Fasteners Inch & Metric Captive Screws Panel Screws & Hardware Screws Manufacturer: Penn Engineering Manufacturer Part Number: Penn Engineering PF12MF-440-1 Thread Size: 4-40 Drive Type: Slotted/#1 Phillips Animation: View Animation SKU: PEMPF12MF-440-1 Finish Knob: Natural Finish Finish Retainer: Natural finish Finish Screw: Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless Finish Spring: Natural Finish Material Knob: Aluminum Material Retainer: Aluminum Material Screw: Heat-Treated Carbon Steel Material Spring: 300 Series Stainless Steel Min. Sheet Thickness: .031 in Screw Length Code: 1 Thread Code: 440 Type: Smooth Cap - PF12MF A Max.: .041 in C Max.: .186 in E ± .010: .417 in G ± .025: .230 in Hole Size in Sheet + 0.005 - 0.000: .187 in P ± .025: .055 in T1 Nom.: .310 in T2 Nom.: .450 in