NGK 7112 Spark Plug

NGK Standard Spark Plug 7112 Overview

NGK Standard Spark Plug 7112 is a conventional replacement spark plug built around a copper center electrode, nickel tip materials, and a standard ground electrode design. It uses a flat seat, 12 mm thread diameter, 0.5 in. reach, and a pre-gap size of .028 for service on a wide range of ignition applications.

NGK’s Standard Spark Plug line focuses on OE-style construction and consistent ignition performance for domestic and import vehicles. Part number 7112, also identified as D8HA, reflects NGK’s long-standing role as an OE supplier and its emphasis on durability, fit, and operational consistency.

Key Features

• NGK Standard Spark Plug, part number 7112
• Copper center electrode core material with nickel center tip
• Nickel ground electrode tip and nickel ground core material
• Standard ground configuration with one ground electrode
• Resistance: 1
• Pre-gap size: .028
• Flat seat design
• 12 mm thread diameter, 0.5 in. reach, 18 mm hex size
• Electrical terminal type: stud
• Manufacturer heat range: 8

Detailed Description

NGK 7112 is a standard spark plug engineered for ignition systems that call for a flat-seat plug with a 12 mm thread and .5 inch reach. The copper core supports efficient heat transfer, while the nickel electrode materials provide a conventional service design for routine maintenance. This plug is identified by NGK as D8HA and is part of the Standard Spark Plug line for broad OE-style coverage.

For drivers and technicians searching for an NGK spark plug 7112 replacement, this part is a direct service option for applications that specify the listed dimensions and heat range. It is commonly referenced in searches for Honda Civic spark plug replacement, Toyota Corolla spark plug replacement, and other import vehicle ignition service where the exact plug specification matters.

This part cross-references Autolite 4173 and Anchor 2715 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions tied to plug wear or incorrect gap
• Reduced throttle response from degraded spark delivery
• Maintenance replacement for vehicles calling for NGK 7112 or D8HA

Installation Notes and Tips

Verify the required thread diameter, reach, seat type, heat range, and terminal style before installation. Check the plug gap against the engine specification before use, and confirm the ignition system is in good condition to avoid repeat fouling or misfire. Use the vehicle service manual for torque and removal procedures.

Compatible With applications that specify a 12 mm, flat-seat spark plug with .5 inch reach and a .028 pre-gap. For fitment-based searches, this NGK spark plug 7112 is commonly researched alongside Honda Civic and Toyota Corolla ignition service terms, but final application must match the engine specification.

Quality Assurance

NGK is a major OE spark plug supplier in North America with more than 80 years of automotive experience. Its manufacturing and distribution network supports consistent product standards for domestic and import vehicle service, and the Standard Spark Plug line is built to maintain original equipment-level specifications where required.