Value Collection MSC-67561845 Button Cap Screw 4-40 1/2 in

Product Description

The VALUE COLLECTION MSC-67561845 is a 4-40 button socket cap screw designed for applications requiring a low-profile fastener head with hex socket drive. Manufactured from 18-8 stainless steel with a bright, uncoated finish, this screw delivers corrosion resistance suitable for general industrial, mechanical, and light structural assembly work. The 1/2 inch length under head accommodates shallow through-hole and tapped applications. The hex socket drive requires a 1/16 inch hex key for installation and removal. This fastener is fully threaded along its shank and conforms to ANSI/ASME B18.3 and ASTM F837 standards.

This screw is used across a wide range of trade and industrial assembly contexts, including HVAC equipment panels, electrical enclosures, pump housings, and control boxes where a flush or near-flush fastener profile is preferred. The button head style distributes clamping load over a wider bearing surface compared to a standard socket head, making it well suited for thin or soft substrate materials. It is sold individually per package, with a minimum order quantity of 100 units.

Key Features

• 4-40 UNC thread size with right-hand thread direction and Class 3A thread fit for precise mating
• Button head profile provides low clearance and broad bearing surface
• 18-8 stainless steel construction resists corrosion in wet or humid environments
• Bright, uncoated finish — no additional surface treatment that could affect dimensional tolerances
• Fully threaded shank for maximum thread engagement in shallow tapped holes
• Meets ANSI/ASME B18.3 and ASTM F837 fastener standards

Compatibility

Designed as a standard UNC 4-40 button socket cap screw compatible with any tapped hole or nut conforming to 4-40 UNC thread specifications per ANSI/ASME standards.

Installation Notes

Installation requires a 1/16 inch hex key or matching hex socket bit. Ensure the mating tapped hole is clean and free of debris before driving the fastener. Do not exceed the rated drive torque for 4-40 stainless steel fasteners, as 18-8 stainless is susceptible to galling under excessive torque without lubrication. Apply an appropriate anti-seize compound when threading into stainless or aluminum components to prevent thread seizing.