Get quick starts and the spark your equipment needs from the Autolite Copper Spark Plug 258. It's a direct-fit replacement across a broad list of small engines and outdoor power equipment — chain saws, blowers, brush cutters, aerators, edgers, construction equipment, and Briggs & Stratton and Kawasaki small engines among the 487 listed applications. See the Buyer's Guide tab for the full list.
Specs: 14 mm thread (M14 - 1.25), 3/4 in hex, flat seat with an included flat washer, 0.374 in (9 mm) reach, manufacturer heat range 2, standard center-electrode design with short projection, non-resistor type, and a non-removable terminal nut. Backed by a 2-year limited warranty. Country of origin: China.
Interchange: 7542 · 8451 · 8461 · CJ14 · RJ12C · 5628 · B2LM S25 · B2LMS25 · BM4A · BM4A SOLID · BM4ASOLID · BM4Y · BM4Y BL1 · BM4YBL1 · CS5. Manufacturer part number 258.
This part cross-references / interchanges with the following part numbers:
What kind of spark plug is the Autolite 258?
It's a copper spark plug with a copper core center electrode, high nickel alloy center and ground electrodes, a high alumina ceramic insulator, and a corrosion-resistant nickel-plated shell.
What are the key specifications?
14 mm thread (M14 - 1.25), 3/4 in hex, flat seat with an included flat washer, 0.374 in (9 mm) reach, heat range 2, non-resistor type, and a non-removable terminal nut.
Is a washer included?
Yes. The Washer(s) Included attribute confirms a flat washer is included with this flat-seat plug.
Is this a resistor spark plug?
No. The catalog lists Resistor Type: No, so the 258 is a non-resistor copper plug.
How do I know it fits my equipment?
The 258 covers 487 listed applications including chain saws, blowers, brush cutters, and small engines. Check the Buyer's Guide tab to confirm your exact make and model before ordering.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
