5451XL Chrome Acorn Bulge Lug Nut – 9/16" Thread, 3/4" Hex, 1.90" Tall, 60° Degree
Part Number: 5451XL
The 5451XL chrome acorn bulge lug nut — a 9/16" thread, 3/4" hex, 1.90" tall steel wheel nut with a 60° conical bulge seat. Chrome-plated for corrosion resistance and an OE-style finish, this acorn bulge lug nut is a direct replacement fastener for factory and aftermarket wheels that use a 60° conical seat.
Order it the way your shop works: single pieces for counter sales and one-off repairs, a 50 PCS box for everyday installs, or a 300 PCS case for high-volume tire shops and fleet service departments.
Key features
- 9/16" right-hand thread — fits 9/16" wheel studs
- 3/4" hex — standard socket size, no special tooling required
- 60° conical bulge acorn seat — wider seating surface for better wheel centering and clamping force
- 1.90" overall height — extra-long body for wheels with deeper lug bores
- Chrome-plated steel — strong, corrosion-resistant, polished OE-style appearance
- Part #5451XL — sold individually, by the 50-piece box, or by the 300-piece case
Specifications
| Part number | 5451XL |
| Product type | Acorn bulge lug nut |
| Thread size | 9/16" |
| Thread direction | Right-hand |
| Hex size | 3/4" |
| Overall height | 1.90" |
| Seat type | Bulge acorn |
| Seat angle | 60° conical |
| Material | Steel |
| Finish | Chrome-plated |
| Washer included | No |
| Wheel lock key included | No |
| Pack sizes | 1 PCS / 50 PCS box / 300 PCS case |
| Brand | C-HORSE |
Who this lug nut is for
- Tire and wheel shops replacing damaged, rusted, or mismatched lug nuts
- Wheel installers fitting aftermarket wheels that require a 60° conical bulge seat
- Fleet and trailer maintenance departments buying bulk lug nuts by the case
- Anyone needing a taller 1.90" acorn nut for deeper wheel lug bores
Fitment: check before you order
Confirm all four of these against the wheel and stud you are working with: 9/16" thread size, 3/4" hex, 60° conical seat, and 1.90" overall height. A lug nut with the wrong thread size or seat angle will not clamp the wheel correctly.
Install with a 3/4" socket and torque to the vehicle manufacturer's specification in a star pattern. Re-check torque after the first 50–100 miles of driving. Professional installation is recommended.
Frequently asked questions
What socket size fits the 5451XL lug nut?
A 3/4" socket. The 5451XL has a 3/4" hex, so no specialty tooling is needed.
What thread size is the 5451XL lug nut?
9/16" right-hand thread.
What is a bulge acorn lug nut?
A bulge acorn nut has a rounded shoulder below the 60° cone that extends the seating surface further into the wheel's lug bore. The added contact area spreads clamping load and helps center the wheel, which is why bulge seats are common on aftermarket wheels.
How tall is this lug nut?
1.90" overall — taller than a standard acorn nut. Check that the lug bore is deep enough and that any center cap or hub cover still clears.
Is a washer or wheel lock key included?
No. This listing is the lug nut only — no washer and no lock key.
Can I buy these in bulk?
Yes. Choose the 50 PCS box or the 300 PCS case from the quantity selector, or order single pieces if you only need a few.