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Started by Philly73rhodes78, August 21, 2020, 06:40:03 PM

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Philly73rhodes78

Anyone know the screw size of the screws that hold the harp in the the Mark I?  I know its a regular screw. VV charges a buck a piece, not to mention the high cost of S/H.  If I found out i will go to Home Depot and pay a buck for a box of 50.

ummagumma


yeah my MK1A just has regular Robertson headed woodscrews. But they are probably not original


sean

#2

If you have an early Mark I piano with wooden harp supports, the harp is held down with screws similar to modern sheet metal screws.  I would buy Round Head Phillips #12 sheet metal screws, 1" long.

Zinc plated https://www.homedepot.com/p/Everbilt-12-x-1-in-Phillips-Pan-Head-Zinc-Plated-Sheet-Metal-Screw-6-Pack-806601/204275210

Stainless https://www.homedepot.com/p/Everbilt-12-x-1-in-Phillips-Pan-Head-Stainless-Steel-Sheet-Metal-Screw-2-Pack-801191/204275403

or here is your box of fifty:  https://www.mcmaster.com/92470A296/

===========================

If you have a Mark I piano with aluminum harp supports, the screw used is a plain steel pan-head phillips screw with #12-24 threads, length 0.850" - a 3/4" or 1" length will work fine, but 1.250" screw will bottom out on the aluminum extrusion.  The original screws were self-tapping, but you don't need to cut new threads, so just get a plain screw.  The original screws are not stainless steel.

https://www.mcmaster.com/91772A397/

Sean

pianotuner steveo

#3
The price of screws has gone way up the last couple of years. You may get a few for a buck these days, but not a box full. Do you have any least 1 that you can bring to a store to match up?
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 270 Butterfly Grand
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
2017 Yamaha P255
2020 Kawai CA99
....and a few guitars...