# Lug nuts and wheel bolts: thread sizes (M12x1.5, M12x1.25, M14x1.5, 1/2-20, 9/16-18), seat types (60° cone, ball R12 to R14, flat with washer) and hex sizes (17, 19, 21 mm, 13/16, 3/4 in)

> What lug nut thread, seat and hex size does my wheel use: M12x1.5, M14x1.5, 1/2-20, 60 degree cone or ball seat, 19 mm or 21 mm?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: Wikipedia 'Lug nut' (mirror), motorverso, McGard catalogue, Dorman and McGard product listings, astina.dk, 034Motorsport, PeachParts forum, wheel-sizes.com and rerev.com vehicle pages; numbers only
- Page: https://xemstudio.com/objects/lug-nuts-and-wheel-bolts/ · JSON: https://xemstudio.com/api/geometry?object=lug-nuts-and-wheel-bolts · Plain text: https://xemstudio.com/objects/lug-nuts-and-wheel-bolts/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no tolerance added.

## Notes

- A lug nut or wheel bolt is defined by four things: thread, seat, hex and length. The thread has to match the stud or hub, the seat has to match the wheel, the hex has to match your socket; length depends on wheel thickness and thread engagement. The nut or bolt must also match the pattern on the wheel (see wheel-bolt-patterns-pcd-lug-patterns).
- Where the sources disagree: the inch 9/16 thread is 9/16-18 in McGard's catalogue, motorverso and trailer hub listings, and 9/16-20 in Wikipedia. Wikipedia also calls 13/16 in a less common hex, while motorverso and McGard treat it as the standard inch match to 21 mm. 13/16 in is 20.64 mm, so a 21 mm socket fits but is not the same size; 3/4 in is 19.05 mm against 19 mm.
- Thread major diameters are the nominal designation (M12 = 12.0 mm; 1/2 in = 12.7 mm); pitches are the second number. No tolerance classes or thread forms were read, and wheel-seat angle tolerances are not published in the sources; use the wheel maker's data.
- Lug nut lengths are product-specific: Dorman 611-183 (M12-1.50, 19 mm hex) is 0.831 in (21.1 mm) overall and McGard 69432 (M14x1.5, 13/16 hex) is 1.945 in (49.4 mm); the cone, bulge and hub-cap profiles are not given as numbers, so no nut or bolt models are published.
- Torque: the sources read do not give general values (Wikipedia: vehicle and wheel maker values apply; wheel-sizes.com prints per-vehicle torque on some pages, 131 Nm for the Toyota Tundra and 133 Nm for the Nissan Titan, which are not repeated as rules). Use the vehicle's manual.
- Files: none; this page is numbers only. McGard's catalogue is the maker's listing used for the thread and hex sizes; the maker's own CAD was not found.

## Sizes

| kind | item | dimension | where the sources show it | sources |
|---|---|---|---|---|
| thread | M12 x 1.5 | major Ø12, pitch 1.5 mm | most common M12 pitch (Wikipedia); Dorman 611-183 (19 mm hex, 60° cone, 0.831 in long); Honda Civic, Ford Focus RS, BMW 330 2001-06 (wheel-sizes.com); Acura, BMW, Corvette 1984+ (motorverso) | Wikipedia; Dorman; wheel-sizes.com; motorverso; McGard |
| thread | M12 x 1.25 | major Ø12, pitch 1.25 mm | Nissan Titan (wheel-sizes.com); Nissan, some Subaru (rerev.com) | Wikipedia; McGard; wheel-sizes.com; rerev.com |
| thread | M12 x 1.75 | major Ø12, pitch 1.75 mm | listed by Wikipedia and in McGard's catalogue; no vehicle named in the pages read | Wikipedia; McGard |
| thread | M14 x 1.5 | major Ø14, pitch 1.5 mm | most common M14 pitch (Wikipedia); Chevrolet Tahoe, Audi allroad (lug bolts), Ford F-150 (wheel-sizes.com, rerev.com); Audi 1988+, Acura MDX 2007+, Chrysler 300 2005+ (motorverso); McGard 69432 (13/16 hex, bulge cone, 1.945 in) | Wikipedia; McGard; wheel-sizes.com; rerev.com; motorverso |
| thread | M14 x 1.25 | major Ø14, pitch 1.25 mm | BMW 330 2017 onward (wheel-sizes.com); BMW 7 Series 2009+ (motorverso) | Wikipedia; wheel-sizes.com; motorverso |
| thread | M14 x 2.0 | major Ø14, pitch 2.0 mm | listed by Wikipedia and in McGard's catalogue; no vehicle named in the pages read | Wikipedia; McGard |
| thread | M16 x 1.5 | major Ø16, pitch 1.5 mm | listed by Wikipedia only | Wikipedia |
| thread | M10 x 1.25 | major Ø10, pitch 1.25 mm | listed by Wikipedia only | Wikipedia |
| thread | 7/16-20 UNF | major Ø11.11 mm (7/16 in), 20 TPI | older American cars (Wikipedia); Corvette 1953-1983 (motorverso); in McGard's catalogue | Wikipedia; motorverso; McGard |
| thread | 1/2-20 UNF | major Ø12.7 mm (1/2 in), 20 TPI | older American cars (Wikipedia); in McGard's catalogue; Dexter 5 on 4.5 and 5 on 4.75 trailer hubs (nuts / studs) | Wikipedia; McGard; needatrailerpart.com |
| thread | 9/16-18 UNF | major Ø14.29 mm (9/16 in), 18 TPI | McGard's catalogue and motorverso (Dodge Dakota 2005+); 8 on 6.5 trailer hubs with 9/16 studs. Wikipedia prints 9/16-20 instead: the sources disagree | McGard; motorverso; nationwidetrailers.com; Wikipedia (9/16-20) |
| seat | 60° cone (conical, taper, 'bulge cone', 'under hub cap', 'spline drive' are body styles on it) | cone angle 60° (45° on some racing wheels) | the most common seat; Dorman 611-183 prints 'Conical Seat - 60 deg'; motorverso: 'about 60 degrees'; McGard lists cone seat, bulge cone, under hub cap and spline drive styles | Wikipedia; motorverso; Dorman; McGard |
| seat | ball (radius, spherical) R12 / R13 / R14 / R15 | the number after R is the ball radius in mm (R13 = 13 mm); the bolt must be matched to the wheel seat | Audi, BMW, Honda, Volkswagen (Wikipedia, motorverso); Mercedes-Benz W210 R12 (PeachParts); Audi / VW R13 nut with M14x1.5 and 3/4 in hex (034Motorsport), which does not fit the wider Porsche / Mercedes seat. astina.dk: R12 older or specific models, R13 many models, R14 larger cars, R15 trucks and very large cars (its words, not a standard) | Wikipedia; motorverso; astina.dk; 034Motorsport; PeachParts |
| seat | flat seat with washer (mag / shank style) | washer clamps the wheel; shank 13 to 25 mm (1/2 to 1 in) in older alloy wheels (Wikipedia) | McGard lists 'mag washers' for standard mag, Cragar centre-hole, Cragar offset-hole and duplex mag wheels; motorverso: 'flat resembles a washer with a small barrel that must centre in the lug hole' | Wikipedia; McGard; motorverso |
| hex (wrench) | 17 mm | 17 mm across flats | most common size with 19 and 21 mm (Wikipedia, motorverso) | Wikipedia; motorverso |
| hex (wrench) | 19 mm = 3/4 in | 19 mm (3/4 in = 19.05 mm) | Dorman 611-183 is 19 mm; 034Motorsport R13 nut is 3/4 in; motorverso: 19 mm, 3/4 in also fits | Wikipedia; Dorman; 034Motorsport; motorverso |
| hex (wrench) | 21 mm = 13/16 in | 21 mm (13/16 in = 20.64 mm) | McGard 69432 is 13/16 hex; motorverso: 21 mm, 13/16 in also fits; Wikipedia lists 13/16 in as less common | Wikipedia; motorverso; McGard 69432 |
| hex (wrench) | 22 mm, 23 mm, 11/16 in, 7/8 in, 15/16 in, 1 in | 22 mm (7/8 in = 22.23 mm), 23 mm, 11/16 in = 17.46 mm | less common (Wikipedia); McGard's catalogue lists 3/4, 13/16, 7/8, 15/16, 19 mm, 22 mm and 1 in hexes | Wikipedia; McGard; motorverso |
| fastener type | lug nut vs lug bolt | nut on a stud in the hub; bolt screws into a tapped hub | Audi, BMW, Mercedes-Benz, Saab and Volkswagen use lug bolts (Wikipedia); Audi allroad, BMW lug bolts in wheel-sizes.com | Wikipedia; wheel-sizes.com |

## Where the files are

- Wikipedia (IPFS mirror): [Lug nut: seat types, metric and inch threads, hex sizes, bolts vs nuts](https://ipfs.ssi.eecc.de/ipns/en.wikipedia-on-ipfs.org/wiki/Lug_nut) — web — Publisher's page; dimensions are facts
- motorverso: [Lug nut size guide: seat types, thread by make, socket sizes](https://www.motorverso.com/lug-nut-size/) — web — Publisher's page; dimensions are facts
- McGard (catalogue PDF via carid.com): [Lug nut and wheel lock tables: thread, seat, hex, length](https://images.carid.com/mcgard/wheels-tires-accessories/pdf/catalog.pdf) — web — Publisher's page; dimensions are facts
- IAG Off-Road (McGard 69432 listing): [Hex lug nut, cone seat bulge style, M14x1.5, 13/16 hex, 1.945 in](https://www.iagoffroad.com/products/mcgard-hex-lug-nut-cone-seat-bulge-style-m14x1-5-13-16-hex-1-945in-l-box-of-100-chrome-69432.oembed) — web — Publisher's page; dimensions are facts
- Dorman HD Solutions (611-183): [Lug nut M12-1.50, conical seat 60 deg, 19 mm hex, 0.831 in long](https://www.dormanhdsolutions.com/p-11573-611-183.aspx?origin=YMM) — web — Publisher's page; dimensions are facts
- astina.dk: [Wheel bolts with R12, R13, R14 and R15 ball heads (R = ball radius in mm)](https://www.astina.dk/en/the-difference-between-wheel-bolts-with-r12-r13-r14-and-r15-ball-head-a-608.html) — web — Publisher's page; dimensions are facts
- 034Motorsport: [Wheel nut Audi / VW R13 ball seat M14x1.5, 3/4 hex](https://store.034motorsport.com/wheel-nut-audi-vw-r13-ball-seat-m14x1-5.html) — web — Publisher's page; dimensions are facts
- PeachParts forum: [R12 vs R14 ball seat radius (Mercedes-Benz W210 uses R12)](https://www.peachparts.com/shopforum/mercedes-benz-wheels-tires/178269-r12-vs-r14-ball-seat-radius.html) — web — Publisher's page; dimensions are facts
- wheel-sizes.com: [BMW 330 lug nut size by year: bolt pattern, thread, centre bore](https://wheel-sizes.com/lugnuts/bmw/330/) — web — Publisher's page; dimensions are facts
- wheel-sizes.com: [Chevrolet Tahoe lug nut size by year](https://wheel-sizes.com/lugnuts/chevrolet/tahoe/) — web — Publisher's page; dimensions are facts
- wheel-sizes.com: [Nissan Titan lug nut size by year](https://wheel-sizes.com/lugnuts/nissan/titan/) — web — Publisher's page; dimensions are facts
- rerev.com: [6x135 bolt pattern: make, model, centre bore, thread](https://rerev.com/bolt-patterns/6x135/) — web — Publisher's page; dimensions are facts
- rerev.com: [5x114.3 bolt pattern: makes, centre bore range, thread sizes](https://rerev.com/bolt-patterns/5x114.3/) — web — Publisher's page; dimensions are facts

## Questions

**What size are most lug nuts?**

M12x1.5 (Honda, Toyota, many cars) and M14x1.5 (trucks, SUVs, Audi); these are the most common pitches in Wikipedia's list.

**What does 'R13' on a ball-seat lug bolt mean?**

13 mm ball radius. R12, R13, R14 and R15 are different radii and must match the wheel's seat.

**Is a 21 mm lug nut socket the same as 13/16 in?**

No: 21 mm is the metric size; 13/16 in is 20.64 mm. A 21 mm socket fits a 13/16 in nut, but they are not equal.

**What seat angle do conical lug nuts use?**

60° normally; 45° on some racing wheels (Wikipedia). Dorman prints 'Conical Seat - 60 deg' for the M12-1.50, 19 mm part 611-183.

**What thread are the studs on a 5 on 4.5 trailer hub?**

1/2-20 (Dexter 5 on 4.5 and 5 on 4.75 kits); 8 on 6.5 hubs have 9/16 studs. See trailer-hub-bolt-patterns.

## Fits with

- [Wheel bolt patterns (PCD and lug count): 4x100, 5x114.3, 5x120, 6x139.7, 8x6.5 and more, with makes, hub bore, stud thread + 15 hole-pattern templates](https://xemstudio.com/objects/wheel-bolt-patterns-pcd-lug-patterns/)
- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)
- [Hex nuts, inch: #4-40 to 3/4-10 (ASME B18.2.2)](https://xemstudio.com/objects/hex-nuts-inch/)
- [Thread size reference: UNC / UNF and ISO metric coarse / fine — major, minor and pitch diameter, tap drill, clearance hole (close, normal, loose)](https://xemstudio.com/objects/thread-reference-tap-drills-clearance/)
- [Hex flange nuts, DIN 6923: M3–M20 across flats, flange diameter, height, flange thickness + M5–M16 envelope files](https://xemstudio.com/objects/flange-nuts-din-6923/)
- [Nylon-insert lock nuts (nyloc), ISO 7040 and DIN 985, M3–M36: width across flats, height, bearing diameter + M10–M30 envelope files](https://xemstudio.com/objects/nylon-insert-lock-nuts-iso-7040-din-985/)