Speedmaster®
1/2" Chromoly Steel Black Oxide Hardened Ground Washer
Product Information
Overview
Speedmaster flat washers are machined from tough 4130 chromoly steel, heat-treated to proper hardness, and parallel-ground so that stress loads are more evenly distributed and torque readings are more accurate. They can also be used on main bearing caps, rocker arm stands, and other engine components and can be used over and over again.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE321.1002 |
| Part Type: | Washer |
| Washer Inside Diameter (in): | 0.500 in. |
| Washer Inside Diameter (mm): | 12.700 mm |
| Washer Thickness (in): | 0.120 in. |
| Washer Thickness (mm): | 3.048 mm |
| Washer Material: | Chromoly |
| Washer Finish: | Black oxide |
| Inside Diameter Chamfer: | Yes |
| Hardened: | Yes |
| Quantity: | Sold individually. |
Warranty Information
12-Month Limited Worldwide Warranty
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Installation Guide
Our AI assistant generates a step-by-step guide for this product — covering installation, maintenance, and troubleshooting.
This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.