Description
Exclusive Arp flash sale discount at StreetFX!
Talk about timing! This is a limited offer while stocks last on various Arp part numbers. There's never been a better time to buy your Arp upgrades, so what are you waiting for?!
This item is currently on sale!
Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.
Rocker Arm Nut - 3/8-24 in Thread - 0.550 in Shank Diameter - 1.200 in Long - Chromoly - Black Oxide - Aluminum Rockers - Set of 16
ARP Perma-Loca c adjustable 3/8 12pt rocker arm nut kit
Data: v2 - Desc: v4.2 - Upd: 2026-11-07 16:28:29
Features
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Arp, Arp Fasteners |
| StreetFX SKU | arp300-8243 |
| SFX Item ID | 4368313 |
| Accounting SKU | arp-300-8243 |
| Manufacturer SKU | 300-8243 |
| Manufacturer UPC | 672036012076 |
| Alternative References | 300-8243, ARP-300-8243 |
Rocker Arm Nuts, Roller Rockers, 3/8 in.-24 Thread, .550 in. Outside Diameter, Set of 16
Stop your rocker arms from loosening forever with these ARP Perma-Loc rocker arm adjusters. Made from heat-treated, premium-grade 8740 chromoly steel, these adjusters provide 190,000 psi tensile strength for the utmost in reliability. Other features include exclusive heads with special shouldered stops to hold the adjusting wrench, 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.
| Product Attributes | |
|---|---|
| Brand | ARP |
| Manufacturer's Part Number | 300-8243 |
| Part Type | Rocker Arm Nuts |
| Product Line | ARP Perma-Loc Rocker Arm Adjusters |
| UPC | 672036012076 |
| Rocker Arm Style | Full roller |
| Rocker Arm Nut Style | Polylock |
| Rocker Stud Thread Diameter | 3/8-24 in. |
| Overall Height (in.) | 1.20 in. |
| Shank Diameter (in.) | 0.55 |
| For Use with Stud Girdle | No |
| Quantity | Sold as a set of 16. |
| Notes | Designed for use with aluminum body roller rocker arms. |
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