Value Collection 201135P Button Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 201135P is a button socket cap screw designed for applications where a low-profile head is required alongside the clamping strength of an alloy steel fastener. Sized at 5/16-18 UNC thread with a 5/8-inch length under the head, this screw is fully threaded and driven by a 3/16-inch hex socket. The black oxide coating provides mild corrosion resistance and reduces light reflection on installed assemblies. Hardness is rated at 36-43 HRC, meeting the requirements of ANSI/ASME B18.3 and ASTM F835. Machinists, millwrights, and mechanical assembly technicians are the primary installers of this fastener.

This button socket cap screw suits general mechanical assembly, machine guarding, fixture building, and equipment fabrication where a flush or semi-flush head profile is preferred over a standard hex socket cap head. The low-dome button head distributes clamping load over a wider bearing surface and sits closer to the workpiece face. It is appropriate for both ferrous and non-ferrous base materials in light to medium clamping applications. Minimum order quantity is 100 pieces per order; package quantity is 1.

Key Features

• Low-profile button head for flush or near-flush installations
• Fully threaded 5/16-18 UNC right-hand thread, Thread Fit Class 3A
• 3/16-inch hex socket drive for standard Allen wrenches and hex-bit drivers
• Alloy steel construction with 36-43 HRC hardness per ASTM F835
• Black oxide finish for mild corrosion resistance and reduced surface glare
• Conforms to ANSI/ASME B18.3 dimensional standards

Compatibility

Designed as a standard 5/16-18 UNC button socket cap screw per ANSI/ASME B18.3 and ASTM F835, suitable for use in any application calling for this thread size and head style.

Installation Notes

Installation is performed by mechanical assembly technicians using a 3/16-inch hex key or socket bit driver. Ensure mating threads are clean and free of debris before installation. Do not exceed the clamping load appropriate for 5/16-18 alloy steel fasteners in the base material being used. Black oxide coating is not a heavy corrosion barrier; apply supplemental thread lubricant or sealant if the installation environment involves moisture exposure.