What it is
Hex-head screws hold the panels and many parts in furnaces, outdoor units and appliances. A nut driver grips the screw head and is less likely to strip it than pliers or a screwdriver. A 7-piece set is a common starting point; the Klein 647M listing gives sizes 3/16, 1/4, 5/16, 11/32, 3/8, 7/16 and 1/2 inch.
How to choose
- Magnetic tips keep fasteners from dropping into the cabinet.
- Klein states its 647M set is not insulated and will not protect against electrical shock, so it never replaces switching power off.
- Check your manual for the screw sizes your model uses; some appliances use metric fasteners.
Capacitors can hold a charge after the power is off. Safety terms.
Where to buy
These are Amazon links. Product page links go to one specific listing whose title we read on Amazon; we do not say it fits your model. Search links open search results, which change. Always confirm your model number and the part number in your manual.
Product pages
Searches by type or size
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Sources
General tool guidance. The product statements come from the manufacturers' own listings; check your appliance or furnace manual for anything specific to your model.