Robert Bowen
Robert Bowen Editor
2/21/20 8:13 a.m.

Even though many of us spend our time messing around with cars built on the metric system, we live in a world where the motorsports aftermarket seems to only focus on Imperial hardware. What are we to do with our 14mm strut bolts, 8mm flywheel bolts and the odd 3mm screw when Carroll Smith concentr…

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Knurled.
Knurled. MegaDork
2/21/20 9:22 a.m.

This is the article that I'd been hunting for from my magazine archive!

 

Knowing the difference between ISO and JIS and everything else, makes working on a car much easier, since once you know what language the car speaks, it all makes sense.

 

Even things like my dear S40... engine was Swedish and brakes were Lucas, so they all used one species of fastener.  Chassis was Japanese, so everything that bolted to the chassis was a different species.  Once you knew that, everything was easy.  Even though you did need every wrench in the drawer.

spandak
spandak HalfDork
2/21/20 11:49 a.m.

Can we make a list of places to find *quality* metric fasteners in small quantities? 
 

I just bought a light bar for our Subaru and the chassis mounting bolts are metric and the bolts holding it to itself are sae and it bothers me. All of my vehicles are metric and those are the tools I keep around. 

ebonyandivory
ebonyandivory PowerDork
2/21/20 12:50 p.m.

Screw you and your Metric and Imperial sizes.

Signed: Torx 

Knurled.
Knurled. MegaDork
2/21/20 12:51 p.m.
ebonyandivory said:

Screw you and your Metric and Imperial sizes.

Signed: Torx 

Torx is available in standard and metric.

 

(Want to find a standard Torx?  Look at Ford seatbelts from the 70s.  Seatbelt fasteners are always 7/16-NF, and Ford used Torx)

ebonyandivory
ebonyandivory PowerDork
2/21/20 1:03 p.m.
Knurled. said:
ebonyandivory said:

Screw you and your Metric and Imperial sizes.

Signed: Torx 

Torx is available in standard and metric.

 

(Want to find a standard Torx?  Look at Ford seatbelts from the 70s.  Seatbelt fasteners are always 7/16-NF, and Ford used Torx)

I knew someone would write that.

I was obviously referring to Torx head sizes using the T1 to T100 designations.

Knurled.
Knurled. MegaDork
2/21/20 2:36 p.m.

In reply to ebonyandivory :

The head sizes are not really as important (and usually immaterial around here anyway) as knowing what to expect thread-wise.  A lot of hardware stores do not carry JIS thread pitches, for instance.  One gets to be able to recognize them and hoard them as necessary.

ebonyandivory
ebonyandivory PowerDork
2/21/20 2:44 p.m.

In reply to Knurled. :

Understood. All I ever need to know is what size bit I need to get the thing out of my way.

 

Jumper K Balls (Trent)
Jumper K Balls (Trent) PowerDork
2/21/20 3:26 p.m.

I hate to be that guy but....

They can come in any head form and finish, but the most common are hex-head cap screws (think Allen bolts), and usually they are black finished rather than shiny zinc or chromate-plated.

 

 

A Hex head cap screw is what it sounds like, a hex head. A socket head cap screw (SHCS) is the allen head variety.

 

Satch_Carlson
Satch_Carlson New Reader
2/22/20 7:12 p.m.

Trent says, "A hex-head cap screw is what it sounds like, a hex head. A socket head cap screw (SHCS) is the Allen-head variety."

Thank you! Thank you! It is so nice to find another anal-retentive gearhead in the crowd! (I don't have OCD, I have CDO—it's the same thing, but the letters are in alphabetical order, as they damn well should be.)

 

300zxfreak
300zxfreak New Reader
2/23/20 10:42 a.m.

In reply to Satch_Carlson :

I second that. Is that in the correct order ?

03Panther
03Panther Reader
2/24/20 9:01 p.m.

In reply to Jumper K Balls (Trent) :

Also, there is a difference between a Hex Head Cap Screw and a bolt...

Wally
Wally MegaDork
2/25/20 5:52 a.m.

In reply to spandak :

Check for "Bolt & fastener Suppliers" in you're area.  I have a store here, https://sarjo.com/ that I can walk in and get pretty much anything on the spot or in a day or two and I don't even have to figure what thread it is. 

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