Seat bolt thread pitch

[zac_f83]

What is the thread pitch for the seat bolt holes in the floor anyone know? I am going to be installing SFC's in my 83 this weekend and want to fix a few things while in there so to speak -

[twinturbohow]

Aren't these supposed to be studs, not threaded holes?

[wraithracing]

I believe they are 3/8-16 IIRC, but I am not anywhere near a Mustang and haven't measured a set in several years. They are a standard size, so you can pull your seat studs and take them to your local hardware store and match them up very easily.

Good Luck!

Trey

[FM2NOTCH]

pretty sure the nuts are metric and take a metric socket.

I also found this matches the threads in the floor, Metric M10x30 1.5 Pitch

[wraithracing]

pretty sure the nuts are metric and take a metric socket.

I also found this matches the threads in the floor, Metric M10x30 1.5 Pitch

I believe that is true for the later 4E, but I believe the early car are still standard. Although I could be wrong!

I am still out in the field with no Mustangs to be seen! I can check later in the week if I get relieve out here as I am supposed to.

As I said before to the OP, just pull a seat stud out and take it to your local hardware store and you can match it up quickly no matter if it's standard or metric.

Trey

[FM2NOTCH]

late model resto list a kit from 79-04, but yeah take a stud or nut to the hardware store and match it.

[wraithracing]

late model resto list a kit from 79-04, but yeah take a stud or nut to the hardware store and match it.

Luckily LMR is never wrong. . . .

As I said, you might be right, the last Mustang I did any swapping of seat studs on was my Pace Car for it's SFC and I vaguely remember the threads being standard, but you know I am over 40 now and they say the memory is the first to go . . . or wait, maybe it was something else!

Trey

[FM2NOTCH]

yeah, I trust nothing, just like the guru that sold me piston rings for my carbed 85

"they are all the same from 85 up"

not so!

[cb650]

my 83 cat was metric. Was surprised.

[82GTforME]

Due to the type of end on the bolt I couldn't check all the spares I had. Maybe they don't want you to chase the threads of the bolts?

7/16"-20 UNF was what I came up with. Note the die marks on the bolt. It's almost triangle shaped and took off the high spots in three spots. I would think that is to help lock them into place.

[KevinK]

Pretty sure they were 15 mm when I installed the seat extensions.

[FM2NOTCH]

those bolts look like seat belt bolts and not seat track bolts

[82GTforME]

those bolts look like seat belt bolts and not seat track bolts

You're right. I totally read "seat bolt" for "seat belt thread pitch"!

Here is what I got for the "seat bolt" thread pitched. M9 X 1.25 for the stud end that goes into the body side and M10 X 1.5 for the stud to seat.



Hope it helps!

[arvak]

Just as a point of interest since I was taking out the passenger seat to replace the original heater core; my 86 SVO had studs in the forward 2 pan holes with nuts holding the seats and the rear 2 were bolts......I had thought I'd find all 4 the same, not 2 and 2....?