Bulge Acorn Lug Nuts

12x1.5 bulge acorn lug nuts

The 12x1.5 bulge acorn nut, the long through-hardened 12x1.5 nut and the long 12x1.5 nut with a 3/4" hex (1.75"), all chrome.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 12x1.5 is the stud thread on the Honda Civic 2006–2026 (not the Civic Type R), Accord 2003–2026 and CR-V 1997–2026, the Toyota Corolla 2003–2026 (not the Corolla Hatchback or GR Corolla), RAV4 1996–2026, Tacoma 1995–2023 and 4Runner 1984–2024, the Mazda MX-5 Miata 1990–2026 and the Ford Ranger 2019–2026 (not the Ranger Raptor or Ranger Tremor). See all 12x1.5 lug nuts.

12x1.25 bulge acorn lug nuts

The 12x1.25 bulge acorn nut (3/4" hex) and the long 12x1.25 nut (1.75", 3/4" hex), both chrome.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 12x1.25 is the stud thread on the Nissan Altima 1993–2025, Sentra 1987–2026, Frontier 1998–2026 and Pathfinder 1987–2026 and the Subaru Impreza 1993–2026, WRX 2002–2026, Legacy 1990–2025, Outback 1995–2026 and Forester 1998–2026. See all 12x1.25 lug nuts.

14x1.5 bulge acorn lug nuts

Chrome: the 14x1.5 bulge acorn nut, the long through-hardened 14x1.5 nut and the long 14x1.5 nut with a 3/4" hex (2.2"). Black: 1.75" and 1.9" long, 3/4" hex.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 14x1.5 is the stud thread on the Chevy Silverado 1500 1999–2023, Tahoe 1995–2023 and half-ton Suburban 2000–2023, the Ram 1500 2012–2022, the Ford F-150 2015–2026 (not the F-150 Raptor or F-150 Lightning) and Mustang 2015–2026, the Toyota Tundra 2007–2021 and Sequoia 2008–2026, and the Dodge Charger 2006–2023 and Challenger 2008–2023. See all 14x1.5 lug nuts.

14x2.0 bulge acorn lug nuts

The long through-hardened 14x2.0 nut and the long 14x2 nut with a 3/4" hex (2.2") in chrome, and black 1.75" and 1.9" nuts with a 3/4" hex.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 14x2.0 is the wheel-fastener thread on the Ford F-150 2004–2014 (not the 2004 Heritage), Expedition 2003–2014 (not the Expedition EL) and Lincoln Navigator 2003–2014 (not the Navigator L), and on the F-250 Super Duty and F-350 Super Duty 1999–2002; on a 2002 truck, check the stud thread, since sources disagree on the year it changed. See all 14x2.0 lug nuts.

12x1.75 bulge acorn lug nuts

The 12x1.75 bulge acorn nut, the long through-hardened 12x1.75 nut and the long 12x1.75 nut with a 3/4" hex (2.32"), all chrome.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 12x1.75 is the stud thread on the 5-lug Ford F-150 1997–1999 and the Expedition 1997–1999. See all 12x1.75 lug nuts.

1/2" bulge acorn lug nuts

The 1/2" bulge acorn nut, the long through-hardened 1/2" nut and the long 1/2"-20 nut with a 3/4" hex (1.75"), all chrome.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 1/2"-20 is the stud thread on the Jeep Wrangler 1987–1995, 1997–2006 and 2007–2018 (JK), Grand Cherokee 1999–2010 and Cherokee 1984–2001, and the Ford Mustang 1994–2014, Explorer 1991–2019 and US Ford Ranger 1983–2011. See all 1/2"-20 lug nuts.

9/16" bulge acorn lug nuts

The long through-hardened 9/16"-18 nut and the extra long 9/16"-18 nut (2.2", 3/4" hex) in chrome, and black 1.75" and 1.9" nuts with a 3/4" hex.

Vehicle thread reference only (not a fitment claim for the nuts linked above): 9/16"-18 is the stud thread on the Ram 1500 2002–2011, Dodge Dakota 2005–2011 and Durango 2004–2009. See all 9/16"-18 lug nuts.

7/16" and 5/8" bulge acorn lug nuts

For 7/16": the 7/16" bulge acorn nut, the long through-hardened 7/16"-20 nut and the long 7/16"-20 nut with a 3/4" hex (1.75").

Vehicle thread reference only (not a fitment claim for the nuts linked above): 7/16"-20 is the stud thread on the Chevy Corvette 1955–1982.

For 5/8"-18: the long through-hardened 5/8" nut (13/16" hex, 1.88", 60 degree taper seat). Also listed is a left hand thread 5/8" nut; its listing does not state the pitch, so match both thread diameter and pitch before ordering.

How to choose bulge acorn lug nuts

• Thread: the diameter and pitch must match your studs exactly. 12x1.5 and 12x1.25 look alike, as do 14x1.5 and 14x2.0, and metric and inch threads do not mix. Start each nut by hand; one that binds in the first turns is the wrong thread.
• Seat: a bulge acorn nut seats on a cone, so your wheels' lug holes must be cut for a conical (tapered) seat. Ball (radius) seat and mag (flat washer) seat wheels take their own nuts, even at the same thread. A vehicle named above shares the thread only; check the seat of a lug nut from your own wheels.
• Length and socket: the nuts that list a hex size take a 3/4" socket, except the 5/8" nuts, which take 13/16". These nuts are closed-end, so the stud must not bottom out inside the nut before the seat clamps the wheel; for long studs, use open end lug nuts. If a socket will not fit your wheels' lug holes, see spline and tuner lug nuts.
• Quantity: each nut is priced individually, so order one for every stud on the wheels you are fitting.
• Torque: tighten in a star pattern to your vehicle's specification (see our torque reference) and check them again after the first 50 to 100 miles.

Common questions

What is a bulge acorn lug nut? An acorn lug nut with a closed end and a conical seat whose base bulges out at the seat, giving a broader contact area against the wheel's taper. It installs like a standard acorn nut.

What is the difference between bulge acorn and regular acorn lug nuts? Both seat on a cone. The bulge acorn's seat area is extended, and neither one fits a ball seat or mag seat wheel.

Will bulge acorn lug nuts fit my factory wheels? Only if their lug holes are cut for a conical seat. Compare with a nut from your wheels: a rounded seat means a ball seat wheel, and a flat washer means a mag seat wheel.

What does through hardened mean? The hardening runs through the whole nut, not just its surface as on a case-hardened nut.

More lug nuts

See all bulge acorn lug nuts, long bulge acorn lug nuts, black bulge acorn lug nuts, through hardened lug nuts, left hand thread lug nuts and all wheel lug nuts. Replacement studs are on our wheel studs page.