Tuthill P133-33H Cap Screw M8 x 65 mm
The Tuthill P133-33H is a genuine cap screw in M8 x 65 mm, for Tuthill pump cover and gear case fastening. Fasteners look like the least interesting part of a pump rebuild until one of them is the wrong length, the wrong grade or the wrong material. That is why Tuthill lists them by part number rather than by description alone.
At 65 mm this is the long screw in the pair, used where the fastener has to pass through a deeper stack such as a cover and spacer together. The 25 mm version is P133-13H. Count the screws off the pump as it comes apart and keep the lengths separated. Check the threads in the casting before anything is run down. A galled or stretched thread in a soft casting is a much larger repair than a new fastener.
Key Features
- Genuine Tuthill cap screw
- Size M8 x 65 mm
- Supplied to the factory material specification
- Part of the published Tuthill fastener range
- Replaces a damaged, corroded or over stressed original
- Low cost item worth adding to a rebuild kit
Applications
- Lubrication circuits on compressors, gearboxes and engines
- Burner oil and fuel oil transfer and circulation
- Low pressure hydraulic supply circuits
- Heat transfer oil and quench oil service
- Scheduled overhaul of Tuthill rotary gear pumps
- Spares holding for equipment that cannot afford downtime
Specifications
- Brand: Tuthill
- Manufacturer Part Number: P133-33H
- Part Type: Cap Screw
- Fits: Tuthill pump cover and gear case fastening
- Size: M8 x 65 mm
- Condition: New
Frequently Asked Questions
Q: How many does a pump take?
That depends on the model and the joint. Count them off as the pump comes apart and keep the lengths separated.
Q: Can I reuse the originals?
If the threads are clean and the head is undamaged, usually yes. Anything stretched, corroded or rounded should be replaced.
Q: Can I substitute a hardware store fastener?
It is not worth the risk. Grade, thread form and length are all specified, and a fastener that fails in a pump cover takes the pump with it.
Q: Why is the stainless version listed separately?
So the fastener matches the casing. A stainless pump built with plain steel fasteners gives corrosion a starting point at every joint.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct cap screw.
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