Value Collection 3148MPR 5/16-18x3in Round Head Phillips Screw

Product Description

The VALUE COLLECTION 3148MPR is a 5/16-18 x 3 inch round head Phillips machine screw manufactured from steel with a zinc-plated finish. It is produced to ASME B18.6.3 and SAE J82 standards, confirming dimensional accuracy and consistent mechanical performance. The zinc coating provides basic corrosion resistance for general-purpose applications. Length is measured under the head, giving a full 3 inches of thread engagement depth. This fastener is a standard stock item used by mechanical contractors, maintenance technicians, millwrights, and general tradespeople who need reliable inch-series threaded fasteners for equipment assembly and structural attachment tasks.

The 3148MPR is suited for general mechanical assembly, equipment mounting, and maintenance work across a wide range of industries including HVAC equipment fabrication, electrical enclosure assembly, light structural work, and industrial maintenance. The 5/16-18 coarse thread is widely used in steel-to-steel applications where thread stripping resistance and ease of assembly are priorities. The round head profile provides a low-profile bearing surface appropriate for clearance-critical assemblies. Phillips drive is compatible with standard power and hand tools commonly found in any trade shop or field kit.

Key Features

• 5/16-18 coarse thread for strong steel-to-steel engagement and easy field assembly
• 3 inch length under head for deep thread engagement in thick material stacks
• Round head profile distributes clamping load across a broad bearing surface
• Phillips drive compatible with standard No. 3 power bits and hand screwdrivers
• Zinc-plated steel finish for basic corrosion resistance in indoor and sheltered environments
• Manufactured to ASME B18.6.3 and SAE J82 standards for dimensional consistency

Compatibility

Designed as a standard inch-series machine screw for general mechanical and structural assembly applications requiring a 5/16-18 coarse thread, round head, and Phillips drive configuration.

Installation Notes

Installation is performed with a No. 3 Phillips bit or matching hand driver. Ensure mating holes are tapped or pre-threaded to 5/16-18 specification before driving. Apply a thread lubricant or anti-seize compound when fastening into blind holes or dissimilar metals to prevent galling. Minimum order quantity is 10 pieces per order.