Speedmaster®
3/8" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers)
Product Information
Overview
Speedmaster rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms. Made from heat-treated, premium-grade 4140 chromoly steel, these adjusters provide 190,000 psi tensile strength for the utmost in reliability. Precision CNC-machined threads to ensure optimum seat pressure, flush-machined set screws for proper contact on the studs, and, best of all, they don't require any special tools for installation. They're available in various sizes to suit your needs.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE255.1002 |
| Part Type: | Rocker Arm Nut |
| Rocker Arm Style: | Full roller |
| Rocker Arm Nut Style: | Polylock |
| Rocker Stud Thread Diameter: | 3/8-24 in. |
| Minimum Rocker Slot Width (in): | 0.600 |
| Overall Length (in): | 1.040 in. |
| Outside Diameter (in): | 0.590 in. |
| For Use with Stud Girdle: | No |
| Quantity: | Sold as a set of 16. |
| Notes: | Suits aluminum rockers |
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.