This page provides some information about replacing missing hardward on the GPT-750 panels. Examination shows that the hardware that secures the drawers into the GPT-750 cabinet consists of two parts: a swaged-in "nut" that captures the panel screw, permanently attached to the panel, and the panel screw itself, which has a 3/4" hex head that is also slotted (NB: don't ever use a screw-driver on these things!).
|This is the typical panel retaining screw on the GPT-750.||You can thread the screw out of the swaged-on retainer. Here it's show nearly threaded out. There's never any need to take the screw out, normally, but that's how most of them get lost, most likely!||Here's the back view of the swage-on captive hardware..
|.. and the screw itself.|
|Note: as of 6/2015, I am in the process of having a bunch of captive screws and bushings manufactured for the GPT-750, according to the original TMC drawings! Watch this space and the For Sale page over the coming month or so, when I'll have them for sale!|
Bruce Berman, the expert in matters of careful TMC restoration, provided the following information about the bushing that is permanently swaged onto the panel:
It appears that the captive screw was a TMC custom part. Indeed it is SC-139 (click to get the drawing). As things stand, you will need to get a local machine shop to make some of these things for you. However, if there is interest, I could get 100 or so of these things made and make them available for sale--they won't be cheap however. If you're interested, please get in touch at .
Here're Bruce Berman's comments on the captive screw:
The stainless-steel hex-head screws which are captured by these fasteners (and which secure the front panel/drawer assembly to the cabinet) were custom to TMC. I seem to recall the TMC part number for them was SC-139, and if the dwg can be found in Bob's archives, any suitably equipped machine shop can fabricate these exactly. Fortunately, the GPT-750 I obtained from Tony Faiola had all of these screws in place, and the slotted heads (which so frequently got chewed up in the field) were in perfect shape, so I did not have a need to reproduce them. As a matter of fact, Tony had several of the ones on my rig fabricated locally by a machine shop, and they look absolutely identical to the original screws from Mamaroneck.
The rack handles, and the little black-anodized ferrules that help secure them to the front panel, are also hard-to-replace items. Bruce supplied the following information about them (they're also available from Anatom):
Amatom can also supply the rack handles and ferrules as used by TMC on the front panels of their equipment. As the handles on my GPT-750 were in good shape, to get to the as-new from the factory look which I always try to strive for, I had them re-plated by a guy in Connecticut who does chrome plating for classic auto restorations, and the ferrules were refinished in black anodize using the same process TMC utilized.