NGK 3210 Spark Plug

NGK Standard Spark Plug 3210 Overview

NGK Standard Spark Plug 3210 is a direct-fit ignition component built around a copper center electrode, nickel center tip, and nickel ground electrode tip for consistent spark delivery. It is an OE-style replacement for applications such as Pontiac Bonneville and Pontiac Catalina, including 1950-1958 Pontiac Catalina and 1957-1958 Pontiac Bonneville fitments.

The NGK Standard Spark Plug line focuses on original-equipment-style construction and broad vehicle coverage. Part number 3210, also identified as B-4, uses a flat seat, 14.00 mm thread diameter, .375 reach, 13/16 hex, and a removable nut terminal for common ignition setups.

Key Features

• NGK Standard Spark Plug, part number 3210 / B-4
• Copper center electrode core for stable conductivity
• Nickel center and ground electrode tip materials
• Standard ground electrode design with one ground electrode
• 1 ohm resistance for ignition system compatibility
• Pre-gapped at .028 for installation reference
• Flat seat design with .375 reach and 14.00 mm thread diameter
• 13/16 hex size and removable nut terminal

Detailed Description

NGK 3210 is a standard spark plug engineered for dependable ignition performance in older domestic applications that call for an OE-equivalent plug. Its copper core and nickel electrode materials support steady spark transfer, while the standard ground configuration keeps the design straightforward for classic engine service. This part number 3210 is listed for Pontiac Bonneville and Pontiac Catalina applications, making it a relevant choice when servicing vintage Pontiac ignition systems.

NGK’s Standard Spark Plug line is backed by the company’s long history as an OE supplier and manufacturer for domestic and import vehicles in North America. That background is reflected in the focus on original-equipment standards, broad application coverage, and consistent manufacturing control across automotive, motorcycle, marine, and small engine products.

This part cross-references Anchor 3017 and Autolite 45 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Misfire conditions from weak or inconsistent spark output
• Rough idle in older Pontiac ignition systems
• Reduced throttle response from degraded plug performance
• Service replacement needs for OE-style spark plug maintenance

Installation Notes and Tips

Verify the plug specification against the engine’s required seat type, thread diameter, reach, and heat range before installation. Check the gap against the engine service specification; the listed pre-gap size is .028, while some Pontiac applications reference a 0.035" gap in fitment notes. Inspect the ignition wires, distributor components, and plug condition during service to help maintain consistent ignition performance.

Quality Assurance

NGK is a long-established OE supplier with North American manufacturing and distribution support, and the Standard Spark Plug line is built to original-equipment standards for durability and operational performance. Part number 3210 is produced under NGK’s established quality and coverage focus for automotive ignition service.