Value Collection SMSPI0-400250-100BX Sheet Metal Screw No. 4

Product Description

The VALUE COLLECTION SMSPI0-400250-100BX is a No. 4 pan head sheet metal screw with a slotted drive, supplied in a box of 100. The screw measures 0.25 inches in length under the head and is manufactured from Grade 2 steel with a zinc finish for basic corrosion resistance. Sheet metal screws of this type are self-tapping fasteners used to join thin metal panels, brackets, and sheet metal assemblies. Electricians, HVAC technicians, and sheet metal workers reach for this screw size regularly when securing junction box covers, duct panels, and light-gauge metal components during installation and service work.

This fastener is suited to residential and light commercial applications where a No. 4 thread size is specified. Common use cases include securing electrical enclosure covers, HVAC duct flanges, equipment access panels, and thin sheet metal brackets. The slotted pan head profile sits flush against the work surface without a raised dome, keeping clearances tight in confined spaces. The zinc plating provides adequate protection in dry indoor environments typical of equipment rooms, attic installations, and wall cavities.

Key Features

• No. 4 thread size with 0.25-inch length under head for thin-gauge sheet metal applications
• Pan head profile keeps a low, flat seating surface against the work piece
• Slotted drive compatible with standard flat-blade screwdrivers and bit drivers
• Grade 2 steel construction provides reliable tensile strength for light-duty fastening
• Zinc finish offers basic corrosion resistance for dry indoor environments
• Sold in a box of 100 to support production, service, and maintenance workflows

Compatibility

Designed as a standard No. 4 pan head slotted sheet metal screw suitable for light-gauge sheet metal assemblies in HVAC, electrical, and general sheet metal fabrication and service applications.

Installation Notes

Sheet metal screws of this type are installed by electricians, HVAC technicians, and sheet metal workers using a flat-blade screwdriver or a slotted bit in a power driver set to a controlled clutch setting to avoid stripping the head or over-driving into thin material. Pre-drilling a pilot hole is recommended when fastening harder or thicker gauge stock to reduce the risk of material deformation. Always de-energize electrical equipment before fastening enclosure covers or panels per applicable NEC requirements. Inspect threads and zinc finish before installation and discard any screws showing visible damage or corrosion.