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The VALUE COLLECTION JNFI2075LH-025BX is a 3/4-16 UNF left-hand thread hex nut manufactured from Grade 2 steel with a bright, uncoated finish. Left-hand thread fasteners rotate counterclockwise to tighten, making them the correct choice for applications where standard right-hand threads would loosen under operational torque or rotation. Measuring 1.125 inches across flats and 27/64 inches in height, this nut meets standard dimensional requirements for 3/4-16 UNF fastener assemblies. Licensed tradespeople and mechanical contractors working on rotating shafts, pedal assemblies, or specialty mechanical equipment commonly specify left-hand thread hardware to prevent self-loosening. This item is sold in minimum quantities of 25 per order.
This hex nut is suited for general mechanical and structural fastening applications where a left-hand thread pattern is required. Typical installation scenarios include rotating equipment, bicycle components, certain plumbing fixture assemblies, and machinery where reverse-rotation forces act on the fastener joint. The uncoated bright finish is appropriate for dry or controlled-environment installations. Mechanical contractors, maintenance technicians, and industrial tradespeople working in HVAC equipment, plumbing systems, or general mechanical assemblies may use left-hand thread nuts when assembly design demands it.
Designed for use in any assembly requiring a 3/4-16 UNF left-hand thread hex nut. Verify thread direction and grade requirements against equipment specifications before installation.
Installation should be performed by a qualified mechanic or tradesperson familiar with left-hand thread fastener assemblies. Always confirm thread direction before installation — left-hand thread nuts tighten counterclockwise and loosen clockwise, the opposite of standard fasteners. De-energize and lock out any associated equipment before performing fastener work on rotating or pressurized assemblies. Use a calibrated torque wrench and follow the equipment manufacturer's torque specifications for the fastener grade and size.
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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