Hasselblad 55 Extension Tube Repair

Does anyone have replacement screws for a Hasselblad 55 Extension Tube? (Please see attached image) The screws are the tiny little things that hold the mounting lugs, which mate with the camera body. I am in need of two screws to make it 100% serviceable in my view. It is probably totally serviceable as it is, but I just don't trust 75% strength given the weight of Hasselblad lenses.

Before anyone suggests.... I contacted the retailer who told me I should have seen the one screw missing in the photos. Okay, I probably should have, but I can't confirm this as they had already taken down the listing with the photos for me to see. I must take their word for it. My next thought was that if only one screw was missing in the photo where did the other go? They didn't answer that question. When the package arrived two other screws were just about ready to fall out and were literally hanging by the last thread. (Yes, I thoroughly searched the package and could not find them.) The customer service guy then said that he couldn't help me because it had been an online sale and gave me a guy's name in the Sales Department. I emailed almost a month ago. They've ghosted me. Oh well... lesson learned with that seller.

I have the same extension tube, the screws seem to be M1.4 but with nonstandard head dimensions as it seems. From an old 150 C Sonnar dismantled for parts, i have the 8 screws from the rear bayonet which are the same.
Already tried it with my tube and they fit.

I would suggest to ask around in the US first (David Odess comes to my mind), but if everything else fails, maybe i can part with two of my screws
Alternatively, my service technician here in Austria has a large stock of genuine spare parts, maybe he could also help you.

While the threads are a standard 1.4mm and the length is 2.5mm, the head thickness is the issue as it has to fit flush on the tube screw recess. If you can't find what you need, PM me as I have pretty much all Hasselblad original screws available.

Try looking at this assortment at Amazon,

https://www.google.com/url?sa=t&sou...MQFnoECDsQAQ&usg=AOvVaw1pw6CT8TwjfFFTPGl3yhWE

It would help to know the head type when asking for hardware like this but Amazon should have what you need.

My preference is for Hitachi assortments, but I did no see any in my brief search.

No matter what you get in a M1.4, let us know, please.

Also, accept that you may just need to use torx screws and an Allen key for this fix.

Hitachi does have an assortment of those, iirc.


Godspeed to All here,
Eli.

Photomultiplier said:

I have the same extension tube, the screws seem to be M1.4 but with nonstandard head dimensions as it seems. From an old 150 C Sonnar dismantled for parts, i have the 8 screws from the rear bayonet which are the same.
Already tried it with my tube and they fit.

I would suggest to ask around in the US first (David Odess comes to my mind), but if everything else fails, maybe i can part with two of my screws
Alternatively, my service technician here in Austria has a large stock of genuine spare parts, maybe he could also help you.

Click to expand...

That is good information to know! Thanks for testing the fit.

Mamiya_Repair said:

While the threads are a standard 1.4mm and the length is 2.5mm, the head thickness is the issue as it has to fit flush on the tube screw recess. If you can't find what you need, PM me as I have pretty much all Hasselblad original screws available.

Click to expand...

I was thinking the head dimensions might be a problem. I have been down that road before with repair projects on other things only to discover some totally uniquely oddball screw length, or some such, that precludes using commonly found replacements. Fabricating larger replacements for printing presses or automotive uses is one thing, but things this small of a scale just.... well, nope! I'll send you a PM shortly.

Thank you to everyone for your replies and thoughts! It is very helpful to know the specs / dimensions for future reference.

Final footnote: I opted to purchase two of the proper screws from Mamiya_Repair. Honestly, my experience has shown that nothing fits as well as genuine OEM parts. The Hasselblad 55 extension tube is now fully serviceable and it was an important lesson learned. Pay attention and look for ALL of the screws in a photo even if so very tiny.