Value Collection MSFI0-400430-100BX 4-40 Flat Head Slotted Screw

Product Description

The VALUE COLLECTION MSFI0-400430-100BX is a 4-40 unified coarse thread machine screw with a flat head and slotted drive. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener measures 7/16 inches in overall length and is sized without a washer flange. The flat head profile sits flush with the mating surface when fully driven, making it well suited for applications where a low-profile or countersunk finish is required. This screw meets ANSI B 18.6.7 M, DIN 963, ISO 2009, and JIS B 1101 standards. It is packaged in a box of 100 pieces and installed by electricians, HVAC technicians, and general maintenance trades in light-duty panel and enclosure work.

This fastener is commonly used in light-gauge metal panels, electrical enclosures, junction boxes, instrument housings, and equipment assemblies where a 4-40 thread form is specified. The zinc plating provides baseline corrosion resistance suitable for indoor and light-duty applications. The slotted drive accommodates standard flat-blade screwdrivers, which are a common hand tool in panel and control board service work. The 7/16-inch overall length is measured from the top of the flat head to the tip of the thread.

Key Features

• 4-40 unified coarse thread, 7/16 inches overall length
• Flat head profile for flush or countersunk installations
• Slotted drive compatible with standard flat-blade screwdrivers
• Grade 2 steel construction with zinc-plated finish for corrosion resistance
• Meets ANSI B 18.6.7 M, DIN 963, ISO 2009, and JIS B 1101 standards
• Sold in a box of 100 pieces to support production and service quantities

Compatibility

Designed as a standard 4-40 flat head slotted machine screw suitable for use in electrical panels, control enclosures, instrument housings, and light-gauge metal assemblies requiring a flush-seat fastener.

Installation Notes

Installation is performed with a standard flat-blade screwdriver sized to the slotted head. De-energize all electrical equipment before driving or removing fasteners in live panels or enclosures, following applicable NEC requirements. Avoid overtightening in light-gauge or tapped plastic mating parts to prevent thread stripping. Use a countersink of the appropriate angle to ensure full flat-head contact with the mating surface.