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The STEWART FASTENER J2520MRCZ is a round head combination drive machine screw with a zinc finish, sold in a 100-count jar. These screws measure 0.25 inches in diameter by 1.25 inches in length and feature a combination drive head, which accepts both slotted and Phillips drivers. The zinc coating provides corrosion resistance suitable for general indoor mechanical and electrical assembly work. Trade professionals keep jars of these on hand for panel fastening, equipment mounting, and general hardware tasks in HVAC, electrical, and plumbing service environments.
These machine screws are used across residential and light commercial trade applications wherever a 0.25-20 or equivalent coarse-thread round head fastener is called for. Typical install scenarios include securing electrical enclosure covers, mounting brackets, control panels, and equipment access panels. The combination drive head makes them compatible with a wide range of hand tools commonly found in a service technician's kit.
Designed as a standard round head combination drive machine screw for general-purpose mechanical, electrical, and HVAC assembly applications requiring a 0.25-inch diameter fastener.
Installation is performed by qualified trade technicians using standard slotted or Phillips screwdrivers or power drivers. Always de-energize electrical equipment and follow applicable NEC or local code requirements before fastening into or near live panels or enclosures. Do not overtighten into sheet metal or plastic mounting points, as this can strip threads or crack surfaces. Use the appropriate driver bit size to avoid cam-out and fastener head damage.
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