🔍 Key Concepts

• How sizes are expressed for machine bolts and screws (diameter and threads per inch) • What kinds of items use fraction + dash + number (like 5/16-24) to describe their dimensions • The difference between thread designations and sizes used for plates, pullers, and torch tips

💭 Think About

• Ask yourself: In what context have you seen numbers like 1/4-20, 3/8-16, or 5/16-24 used before? • Which of the choices normally needs both a diameter (in inches) and a thread count per inch to be specified? • Do steel plate gauges, pullers, or torch tips usually use a fraction followed by a dash and a number, or some other sizing system?

✅ Before You Answer

• Verify which item commonly uses two-part designations where the first part is a fractional inch size and the second part is a count (per inch). • Check if plate gauges, puller sizes, or torch tips are normally listed with gauge numbers, model numbers, or orifice sizes instead of a "fraction-number" format. • Make sure the choice you pick clearly relates to threads per inch rather than thickness, tool reach, or orifice opening.