Steel Sheet Metal Screw, Zinc Plated, Pan Head, Phillips Drive, Type AB, 1/4"-14 Thread Size, 1/2" Length (Pack of 100): Amazon.com: Industrial & Scientific
Durable #12 x 5/8" Black Phillips Head Screws 50 Pk. Super Small, Coarse-Thread Coated Steel Wood Screws Great for Indoor DIY Woodworking Projects: Amazon.com: Industrial & Scientific
Types of self-tapping screws for plastic and its characteristics