Value Collection MSCI03101000-100BX Machine Screw 5/16-18

Product Description

The VALUE COLLECTION MSCI03101000-100BX is a 5/16-18 UNC machine screw with a fillister head and slotted drive, sold in a box of 100. Made from Grade 2 steel with a zinc-plated finish, this fastener is designed for general-purpose mechanical assembly where a deep-slotted, raised cylindrical head profile is required. The fillister head provides greater driving depth than a standard pan head, reducing bit slip during installation. The zinc plating offers basic corrosion resistance suitable for indoor and light-duty outdoor applications. Length under head measures 1 inch.

This screw is used in light to medium-duty mechanical, electrical, and general industrial assembly applications. The 5/16-18 UNC thread is a common coarse-thread specification found in machine frames, junction boxes, equipment panels, and fixture mounting. Electricians, HVAC technicians, and maintenance professionals routinely use this fastener when assembling or securing equipment enclosures, brackets, and access panels. The fillister head style is particularly suited to counterbored holes where head clearance is limited.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• Fillister head profile provides deeper slot engagement and reduced cam-out compared to flat or pan heads
• Slotted drive works with standard flat-blade screwdrivers and bit drivers
• Grade 2 steel construction suitable for general-purpose fastening loads
• Zinc-plated finish for basic corrosion and oxidation resistance
• Sold as a box of 100 screws for job-site and shop inventory use

Compatibility

Designed as a general-purpose UNC machine screw for use in any standard 5/16-18 tapped hole or with a matching hex nut. Suitable for steel, aluminum, and similar substrates in mechanical, electrical, and light industrial assembly.

Installation Notes

Install with a flat-blade screwdriver or slotted bit driver sized to the head slot to avoid deforming the drive recess. Verify the mating hole is tapped to 5/16-18 UNC before driving to prevent cross-threading. For structural or load-bearing applications, consult applicable torque specifications from a recognized fastener standard. Zinc-plated fasteners are not recommended for continuous immersion or highly corrosive environments without additional protective measures.