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The VALUE COLLECTION 0407MSB is a 4-40 unified coarse thread machine screw designed for general-purpose fastening in light mechanical and electrical assemblies. It features a binding head profile, which provides a low-profile, wide-bearing surface that resists pull-through on thin materials. The slotted drive accommodates a standard flat-head screwdriver. Manufactured from steel with a zinc finish, this screw meets ASME B18.6.3 and SAE J82 dimensional and material standards. The 7/16-inch length is measured under the head. Sold individually, with a minimum order quantity of 100 pieces per order.
This screw is suited for use in electrical panels, control boards, terminal strips, and light sheet-metal enclosures where a #4-40 thread is specified. The binding head style is common in instrumentation, electronics, and HVAC control wiring applications where conductors or lugs are clamped under the head. It is typically installed by electricians, HVAC technicians, and electronics assembly technicians.
Designed as an OEM-style replacement or service fastener for assemblies requiring a 4-40 threaded binding head machine screw per ASME B18.6.3 and SAE J82 specifications.
Installation is performed with a flat-blade screwdriver sized to the slotted head. De-energize any electrical equipment before fastening or removing screws in live panels or control boards, following applicable NEC requirements. Avoid overtightening, which can strip the 4-40 thread or crack the slotted drive. Confirm thread engagement depth in the mating material before applying torque.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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