Fillister Head Screws

DRLane · 03-04-2022, 03:42 PM

Anyone know is there's anything unique about the Fillister Head Screws for the seat rail mounts? I'm going to replace them with hex bolt.

Note, not on oem rails but direct to floor mounts.

StripclubDJ · 03-04-2022, 11:03 PM

You were that embarrassed about asking this stupid question in the track thread , you made your own thread.

Well played .

roastbeef · 03-05-2022, 02:18 AM

Quote:

Originally Posted by DRLane

Anyone know is there's anything unique about the Fillister Head Screws for the seat rail mounts? I'm going to replace them with hex bolt.

Note, not on oem rails but direct to floor mounts.

Nope, I bought a box of hex heads. I needed something flat to get at it with an open end wrench because of the deep bucket of the seats.

https://www.mcmaster.com/98093A624/

DRLane · 03-05-2022, 07:39 AM

I'm never embarrassed to ask questions

Figured as much, just a weird ass looking shape bolt/threads and figured BMW had some reason.

Thx gang

deansbimmer · 03-05-2022, 07:09 PM

A couple of things. They're partially threaded or "piloted" to help avoid cross threading by lining them up before the threads engage. (Seat bolts are easily cross threaded). Then, they're "encapsulated", with thread locker which technically makes them one time use in their eyes.

roastbeef · 03-05-2022, 07:30 PM

Quote:

Originally Posted by DRLane

I'm never embarrassed to ask questions

Figured as much, just a weird ass looking shape bolt/threads and figured BMW had some reason.

Thx gang

they are M10 x 1.50mm, 40mm Long, but the first 10mm is just to center it like dean said. if you're going to finger tighten it anyways, you could get away with a 25-30mm bolt depending on how thick the mounts are.

i sent you a dm on ig. you can have my extras.

DRLane · 03-05-2022, 08:08 PM

Quote:

Originally Posted by roastbeef

Quote:

Originally Posted by DRLane

I'm never embarrassed to ask questions

Figured as much, just a weird ass looking shape bolt/threads and figured BMW had some reason.

Thx gang

they are M10 x 1.50mm, 40mm Long, but the first 10mm is just to center it like dean said. if you're going to finger tighten it anyways, you could get away with a 25-30mm bolt depending on how thick the mounts are.

i sent you a dm on ig. you can have my extras.

Thanks Mike, I already ordered a box from the link you sent. Pay then forward to someone else

roastbeef · 03-05-2022, 08:09 PM

Quote:

Originally Posted by DRLane

Quote:

Originally Posted by roastbeef

Quote:

Originally Posted by DRLane

I'm never embarrassed to ask questions

Figured as much, just a weird ass looking shape bolt/threads and figured BMW had some reason.

Thx gang

they are M10 x 1.50mm, 40mm Long, but the first 10mm is just to center it like dean said. if you're going to finger tighten it anyways, you could get away with a 25-30mm bolt depending on how thick the mounts are.

i sent you a dm on ig. you can have my extras.

Thanks Mike, I already ordered a box from the link you sent. Pay then forward to someone else

Oof, sorry bud. I don't know why I didn't think of it sooner.

03-04-2022, 03:42 PM	#1
DRLane Brigadier General 3992 Rep 3,411 Posts Drives: E92 M3 Join Date: Oct 2018 Location: Colorado iTrader: (21) Garage List 2008 m3 [6.63]	Anyone know is there's anything unique about the Fillister Head Screws for the seat rail mounts? I'm going to replace them with hex bolt. Note, not on oem rails but direct to floor mounts. Attached Images __________________ Not a Doctor, those are just my initials.
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03-04-2022, 11:03 PM	#2
StripclubDJ Lieutenant Colonel 4100 Rep 1,612 Posts Drives: e92 m3 Join Date: May 2016 Location: calis iTrader: (2)	You were that embarrassed about asking this stupid question in the track thread , you made your own thread. Well played .
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03-05-2022, 07:39 AM	#4
DRLane Brigadier General 3992 Rep 3,411 Posts Drives: E92 M3 Join Date: Oct 2018 Location: Colorado iTrader: (21) Garage List 2008 m3 [6.63]	I'm never embarrassed to ask questions Figured as much, just a weird ass looking shape bolt/threads and figured BMW had some reason. Thx gang __________________ Not a Doctor, those are just my initials.
	Appreciate 0 Quote

03-05-2022, 07:09 PM	#5
deansbimmer BimmerPost Supporting Vendor 3768 Rep 2,911 Posts Drives: 2011 E93 M3 Join Date: Nov 2014 Location: DFW, Texas iTrader: (17) Garage List 1988 BMW M3 [0.00] 2013 BMW M3 [0.00] 2011 X5M [0.00] 2011 BMW M3 [0.00]	A couple of things. They're partially threaded or "piloted" to help avoid cross threading by lining them up before the threads engage. (Seat bolts are easily cross threaded). Then, they're "encapsulated", with thread locker which technically makes them one time use in their eyes.
	Appreciate 1 DRLane3991.50 Quote