Brass tipped set screws from RC Fasteners & Components maintain an extremely hard tip that allows for extremely secure holds to any surface.
Brass Tip Set Screws, Hex Socket Drive, Metric #DEX-M1-8 - Nordex, Inc.
MSC Industrial Supply
M8x8 Brass Tip Set Screw - M8x8-btss - M8 - Receiver Set Screws - Hardware Fasteners - M8x8 Brass Tip
Brass Tip Set Screw: Formtech Services, Inc
Setscrews and Thumbscrews
22760.0432 - Thrust Screws with brass pad / Stainless steel
Thorlabs - SS4MB6 M4 x 0.7 Alloy Steel Brass-Tipped Setscrew, 6 mm Long, 10 Pack
J.W. Winco GN913.3-M4-8-MS Set Screw Brass Tip 4N8P13/MS
Brass and Nylon Tip Set Screws FromBuckley QC Fasteners - Brass Tip Set Screws
Steel Brass Tip Set Screws 2-56, 4-40
Length listed is thread length and does not include the Tip Length. Total Length is Tip length + Listed length. Brass Tip Set Screws, 18-8 Stainless
Stainless Steel Brass Tip Set Screw, 2-56, 4-40, 6-32, 8-32 To 3/8-16, M3 to M8
Stainless Steel Set Screws with Plastic Extended Tip - WKOOA