kunzma
SILVER Star
In need of sizes and thread pitch on the four screws that hold the 1965 fj45 dome light together. Any idea where to get them? Thankful for any information!
Size of dome light screws
- Thread starter kunzma
- Start date
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Bear
SILVER Star
They ARE metric--just not what you may be used to seeing.
The Japanese have not always subscribed to the world standards for their fasteners. Prior to the late 1960s they used their own standard, referred to as Japanese Industrial Standard or JIS. In the late 60s they realized they needed to join the world standardization and their metrics became International, ISO. Trucks from 1964-1967 will usually have a few instances where there will be BOTH standards used, depending on the market, and depending upon the date Toyota decided to switch over to ISO for a particular part. Some of the early parts manuals will point out the different requirements, the different part numbers, and the serial numbers on the trucks when a specific changeover occurred.
You will find stuff like this occurs in the taillamp housings, the cowl side air intake vents, early carburetors, and assorted other parts. Sometimes the part is stamped or embossed with the lettering "ISO" to let you know what you're working with. You would be wise to be patient and not assume because a fastener doesn't thread easily that it is damaged, and force the issue with the current metrics, or worse SAE or USS standard items. And yes, there are JIS taps available. The machine screws in question will be 3mm, 4mm, or 5mm, but with the Japanese JIS pitch at that time: M3-0.60, M4-0.75, M5-0.90. And yes, there are some folks who simply grab whatever drill and tap they have handy, and go to town rethreading whatever's in the way. Not my choice, but not my decision to make.
And the difficulty will be in trying to find new machine screws with the JIS pitches--early Japanese motorcycles occasionally will have similar situations. IF..................you do find them, please share with the rest of us, so that we can replace some of the less-than-perfect fasteners we have had to recycle.
Good luck with your project.
The Japanese have not always subscribed to the world standards for their fasteners. Prior to the late 1960s they used their own standard, referred to as Japanese Industrial Standard or JIS. In the late 60s they realized they needed to join the world standardization and their metrics became International, ISO. Trucks from 1964-1967 will usually have a few instances where there will be BOTH standards used, depending on the market, and depending upon the date Toyota decided to switch over to ISO for a particular part. Some of the early parts manuals will point out the different requirements, the different part numbers, and the serial numbers on the trucks when a specific changeover occurred.
You will find stuff like this occurs in the taillamp housings, the cowl side air intake vents, early carburetors, and assorted other parts. Sometimes the part is stamped or embossed with the lettering "ISO" to let you know what you're working with. You would be wise to be patient and not assume because a fastener doesn't thread easily that it is damaged, and force the issue with the current metrics, or worse SAE or USS standard items. And yes, there are JIS taps available. The machine screws in question will be 3mm, 4mm, or 5mm, but with the Japanese JIS pitch at that time: M3-0.60, M4-0.75, M5-0.90. And yes, there are some folks who simply grab whatever drill and tap they have handy, and go to town rethreading whatever's in the way. Not my choice, but not my decision to make.
And the difficulty will be in trying to find new machine screws with the JIS pitches--early Japanese motorcycles occasionally will have similar situations. IF..................you do find them, please share with the rest of us, so that we can replace some of the less-than-perfect fasteners we have had to recycle.
Good luck with your project.
