Machine Screws Phil Pan 18/8 Stainless Black Oxide (MS51957) 4-40X1/4

These Phillips pan-head machine screws are crafted from 18/8 stainless steel and finished with a durable black oxide coating for corrosion resistance and a low-reflection finish. The MS51957 designation corresponds to a 4-40 thread size with a 1/4 inch length, making them ideal for electronics enclosures, appliances, machinery, and other precise assemblies where a broad bearing surface is beneficial.

Key specifications

• Thread size and length: 4-40 x 1/4″ (4-40 thread; 0.25″ long)
• Head type: Phillips pan head for reliable driving and broad bearing surface
• Material: 18/8 stainless steel for excellent corrosion resistance
• Finish: Black oxide coating for reduced glare and additional surface protection
• Drive type: Phillips (PH) drive compatible with standard screwdrivers
• Applications: Electronics enclosures, general machinery, automotive components, and other precision assemblies

For best results, pair these machine screws with compatible nuts and fixtures, and ensure proper alignment to prevent cross-threading. They offer consistent threading and seating for dependable performance in demanding environments.