CMI 17-4 Stainless Crank Pulley Bolt & Washer — H-900, 1/2" Drive or 1" Hex, Made in USA | VW Type 1 Engine: Beetle, Ghia, Thing & Bus (#A07)
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CMI 17-4 Stainless Steel Crank Pulley Bolt & Washer | VW Type 1 (#A07 / CB 2044)
Short answer: This is a CMI Precision Machining crank pulley bolt and stepped washer in 17-4 H-900 stainless (40-44 HRC), turned with a 1/2" drive or a 1" hex, made in the USA. It fits VW Type 1 engines in the Beetle, Karmann Ghia, Thing, Bus through 1971 and Type 1-powered buggies, but not Type 4 engines.
The crank pulley bolt clamps the pulley that drives your fan belt and alternator or generator, and it lives right where road grime and moisture collect. CMI Precision Machining replaces the factory bolt and washer with a set machined from 17-4 stainless steel in the H-900 condition, hardened to 40-44 Rockwell C. The bolt has precision-cut "J" threads with a controlled root radius to resist cracking, and it can be turned with either a 1/2" drive ratchet or a 1" wrench or socket on the outside hex. The large stepped washer centers the crank pulley. Made in the USA.
This is a genuine CMI Precision Machining product — genuine CMI parts, made in the USA, with full factory support.
Vehicle Fitment
- VW Type 1 air-cooled engines: Beetle, Karmann Ghia, Thing, and Type 2 Bus with the Type 1 engine (through 1971)
- Dune buggies, sand rails and kit cars running a Type 1 engine
Not for Type 4 engines (1972 and later Bus, 411/412, 914). Running a Type 3 engine? Contact us before ordering so we can confirm fit.
Key Features and Benefits
- 17-4 stainless, H-900: strong and corrosion resistant, so it will not rust onto the pulley.
- 40-44 RC hardness for durability and strength.
- "J" threads with a controlled root radius: the radiused thread root helps prevent cracking.
- Two ways to turn it: a 1/2" drive ratchet in the head, or a 1" wrench or socket on the external hex.
- Stepped washer: a machined step centers the crank pulley correctly.
- Heavy washer: 6.35mm thick with a 42.6mm outside diameter.
- Made in the USA by CMI Precision Machining.
Technical Specifications
| Manufacturer | CMI Precision Machining (Corona, CA) |
| Material | 17-4 stainless steel, H-900 condition |
| Hardness | 40-44 Rockwell C |
| Threads | Precision-cut "J" threads, controlled root radius |
| Drive | 1/2" square drive or 1" external hex |
| Washer | 6.35mm thick x 42.6mm OD, machined centering step |
| Includes | 1 bolt, 1 washer |
| Country of origin | USA |
| Part numbers | #A07 (Washburn's), CB Performance 2044 |
Installation Notes
- Make sure the washer's machined step is seated in the pulley so it centers the pulley.
- Torque to the specification in your engine builder's or factory service manual.
Frequently Asked Questions
What is it made of?
17-4 stainless steel in the H-900 condition, 40-44 Rockwell C.
What tools do I need?
A 1/2" drive ratchet, or a 1" wrench or socket on the external hex.
What does the step on the washer do?
It centers the crank pulley.
How big is the washer?
6.35mm thick with a 42.6mm outside diameter.
Does it fit a Type 4 engine?
No. It is for Type 1 engines.
Can I keep my existing pulley?
Yes. This replaces the bolt and washer only.
Does this fit a 1967 VW Beetle?
Yes. It fits Type 1 engines in the Beetle 1949–1979, Karmann Ghia 1956–1974, Thing 1973–1974 and Bus 1950–1971, plus Type 1-powered buggies.
What is the part number?
Washburn's Metal #A07, CB Performance 2044.
Are you an authorized CMI dealer?
Yes. Washburn's Metal is an authorized dealer for CMI Precision Machining parts.
Related CMI Parts
All CMI Precision Machining parts
Explore Related Categories
Engine Parts · Hardware · VW Air-Cooled
Prop 65 Warning
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.
