The Dayton Parts 13-3012R is a heavy-duty outer cap nut engineered for stud-piloted (Budd-style) dual wheel setups, specifically those utilizing aluminum wheels. These nuts are designed to match the fit and performance of original equipment, providing the necessary depth and seating for thicker aluminum wheel flanges. This Right-Hand (Clockwise) thread version is intended for the passenger side of the vehicle, ensuring the fasteners remain tight under standard driving rotation.
Optimized for Aluminum: Engineered with the correct depth and 90° conical seat to properly secure aluminum wheels in a dual configuration.
Clockwise (Right) Thread: Designed specifically for the passenger side of the vehicle.
Heavy-Duty Construction: Forged from high-strength carbon steel to withstand the high torque requirements of commercial applications.
Yellow Zinc Finish: Features a durable coating to resist corrosion, rust, and chemical damage from road treatments.
Open-End Design: Accommodates longer studs to ensure full thread engagement and safety.
| Attribute | Specification |
| Thread Size | 1-1/8" - 16 (Fine) |
| Thread Direction | Clockwise (Right Hand) |
| Hex Size (Drive) | 38 mm (1-1/2") |
| Seat Style | Conical Seat (90 Degree) |
| Overall Length | 0.88 in |
| Material | Carbon Steel |
| Color/Finish | Yellow Zinc |
| Grade Type | Standard Replacement |
The 13-3012R is a direct replacement for a wide range of industry part numbers:
| Manufacturer | Part Number |
| Euclid / Meritor | E-5552R, E-5977R, R005552R, R005977R, R005977RPL |
| Peterbilt / Paccar | TBWA015R |
| Volvo / White | 300249 |
| Webb | 178910 |
| IHC / International | 83155H |
| Mack | 21AX95 |
| Fruehauf | 534764 |
| Ford | BB1134 |
| GMC | 3735550 |
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