King Performance Titanium Engine Case Nuts M8 x 1.25 | Air-Cooled VW | 12mm 12-Point Flanged, Black PVD | 11-Pack
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King Performance Titanium Engine Case Nuts — M8 x 1.25, 12mm 12-Point Flanged, Black PVD (11-Pack)
The perimeter nuts that hold an air-cooled VW engine case together are some of the most visible fasteners on a clean build, and some of the first to rust, round off or go mismatched after a few rebuilds. King Performance replaces them with Grade 5 titanium (Ti-6Al-4V) flanged nuts that have a compact 12mm, 12-point head and a wear-resistant black PVD coating. They are light, they will not corrode, and they give the case seam a uniform, finished look that plain zinc hardware never will.
Vehicle Fitment
- Air-cooled VW engine cases with M8 x 1.25 case studs — Type 1-style engines as fitted to the Beetle, Karmann Ghia, Type 3, Thing, early Bus and Type 1-powered dune buggies and Baja Bugs.
- King lists these simply as engine case nuts. Because the 12-point head is smaller than a stock 13mm hex nut, check socket clearance at tight spots and confirm your studs are M8 x 1.25 before you order.
Key Features & Benefits
- Grade 5 titanium: Ti-6Al-4V aerospace alloy — strong, far lighter than steel and immune to rust.
- Hot-forged, rolled threads: rolled rather than cut threads for better fatigue life.
- 12mm 12-point head: a smaller wrenching profile than a stock hex nut, handy around the case seam and fittings.
- 16mm integral flange: a wide built-in bearing surface that spreads clamping load on the aluminum or magnesium case.
- Black PVD coating: a hard vacuum-deposited finish that helps resist galling and gives a stealth black look.
Technical Specifications
| Spec | Value |
|---|---|
| Manufacturer | King Performance |
| Material | Titanium alloy Grade 5 (Ti-6Al-4V) |
| Thread | M8 x 1.25 |
| Head | 12mm, 12-point |
| Flange diameter | 16mm |
| Height | 8mm |
| Threads | Hot-forged, rolled |
| Finish | Black PVD |
| Quantity | 11 nuts per pack |
| Use | Off-highway use only |
Installation Notes
- Always use anti-seize on titanium threads. King specifies it on every titanium fastener — it prevents galling on the stud.
- Clean the studs, run each nut down by hand first, and use a 12mm 12-point socket.
- Torque to the engine builder's or factory specification for your case; do not use an impact wrench on titanium hardware.
- Need more than 11? King also offers a 22-piece quantity — add two packs to your cart or contact us.
Frequently Asked Questions
- How many nuts are in a pack? Eleven M8 x 1.25 flanged nuts.
- What socket do they take? A 12mm 12-point socket.
- Do I need washers? The 16mm flange gives each nut a built-in bearing surface. Where your engine builder uses sealing washers at specific case locations, keep following that practice.
- Why titanium for case nuts? They will not rust, weigh far less than steel and keep their finish through repeated teardowns.
- Is anti-seize really necessary? Yes. Titanium can gall on steel studs; King calls for anti-seize on all titanium threads.
- Are they street legal? King sells them for off-highway use only.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Explore Related Categories
Finish the job with King's titanium 8mm x 1.25 bolt kit (#A12-T), or browse Hardware & Fasteners and Engine Parts & Performance.