Autolite 255DP Copper Non-Resistor Spark Plug Display Pack

The Autolite 255DP is a copper non-resistor spark plug packaged in a retail display pack format. Designed for outdoor power equipment and small engine applications, it delivers reliable ignition, quick starts, and consistent performance across a wide range of operating conditions.

Key Features:

• Full copper core electrode provides superior thermal conductivity and improved resistance to fouling
• High nickel alloy center and ground electrodes engineered for extended service life
• Copper-glass seal bonds the insulator and terminal post center electrode together, creating a 100% leak-proof, gas-tight internal seal that ensures full voltage at the spark gap
• Multi-rib ceramic insulator minimizes the risk of flash-over, which can lead to misfires
• Cold-formed steel shell with precision-rolled threads for superior durability and reduced wear
• Non-resistor design suited for applications where resistor plugs are not required
• Flat gasket seat type for a secure, precise fit

Specifications:

• Thread Size: 14mm
• Thread Pitch: 1.25mm
• Reach: 9.5mm (3/8 in.)
• Hex Size: 3/4 in. (19mm)
• Seat Type: Flat / Gasket
• Pre-Gap Size: 0.030 in. (0.76mm)
• Insulator Type: Short Projection, Multi-Rib Ceramic
• Center Electrode Core: Copper
• Center Electrode Tip: Nickel Alloy
• Terminal Type: Non-Removable Nut
• Resistor: No
• Heat Range: Autolite 8

Cross-Reference Part Numbers:

• AC Delco: CS45
• Bosch: H9B
• Champion: 840
• Denso: 6015
• Motorcraft: A7N
• NGK: 744

Backed by a 2-year limited warranty, the Autolite 255DP is a dependable, cost-effective replacement for OEM spark plugs in outdoor power equipment including lawn mowers, tractors, chainsaws, snowblowers, and leaf blowers.