Bolts and Nuts Measuring

glxstang · 08-03-2001, 08:14 AM

Anyone know how to properly measure different grade bolts when trying to find replacements? Do you need a micro meter? I'm going through a restoration of my stang and want to get the exact bolts. I know you first need the correct grade but then there are the threads, the pitch and the underside and all that stuff.
Thanks......

8850 · 08-03-2001, 09:51 AM

There are many grades of bolts but the identification is on the head. For most applications use SAE grade 5 which has three lines on the head. For Metrick 8.8 is a good grade.

The length of a bolt is measure not including the head. For pitch you need a pitch gauge or use a tap and die set and compare.

There is a lot more involved in fasterners than this but if you have a particular application let me know and I can help.

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88 347, Twisted wedge heads,Comp Cams 224/230 cam, 1/4=10.523 @ 125.99, 60' = 1.472

glxstang · 08-03-2001, 10:14 AM

Thanks 8850!.... I recently removed the two bolts that held the gas tank up to the frame of the car. They are really rusted and I would like to get replacements since I am adding a new tank . On the top of the bolt it says 9.8 . I just don't know how to go about measuring these to get the exact replacements or even where to but them.
Thanks again.

8850 · 08-03-2001, 12:18 PM

That is a metric bolt. Sears Hardware carries metric bolts.

jimberg · 08-03-2001, 01:34 PM

You go to a hardware store and they have little gauges for measuring them. The person at the hardware store should be able to help. A local hardware store like Ace would be best for this type of bolt. I was able to find stainless steel 10.6s for my suspension.

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351W 89 Mustang GT Convertible

08-03-2001, 08:14 AM	#1
glxstang Registered Member Join Date: Feb 2001 Location: Delray Beach, Florida Posts: 97	Bolts and Nuts Measuring Anyone know how to properly measure different grade bolts when trying to find replacements? Do you need a micro meter? I'm going through a restoration of my stang and want to get the exact bolts. I know you first need the correct grade but then there are the threads, the pitch and the underside and all that stuff. Thanks......

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08-03-2001, 09:51 AM	#2
8850 Registered Member Join Date: Nov 1998 Location: Sugarland, TX USA Posts: 161	There are many grades of bolts but the identification is on the head. For most applications use SAE grade 5 which has three lines on the head. For Metrick 8.8 is a good grade. The length of a bolt is measure not including the head. For pitch you need a pitch gauge or use a tap and die set and compare. There is a lot more involved in fasterners than this but if you have a particular application let me know and I can help. ------------------ 88 347, Twisted wedge heads,Comp Cams 224/230 cam, 1/4=10.523 @ 125.99, 60' = 1.472

08-03-2001, 10:14 AM	#3
glxstang Registered Member Join Date: Feb 2001 Location: Delray Beach, Florida Posts: 97	Thanks 8850!.... I recently removed the two bolts that held the gas tank up to the frame of the car. They are really rusted and I would like to get replacements since I am adding a new tank . On the top of the bolt it says 9.8 . I just don't know how to go about measuring these to get the exact replacements or even where to but them. Thanks again.

08-03-2001, 12:18 PM	#4
8850 Registered Member Join Date: Nov 1998 Location: Sugarland, TX USA Posts: 161	That is a metric bolt. Sears Hardware carries metric bolts.

08-03-2001, 01:34 PM	#5
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	You go to a hardware store and they have little gauges for measuring them. The person at the hardware store should be able to help. A local hardware store like Ace would be best for this type of bolt. I was able to find stainless steel 10.6s for my suspension. ------------------ 351W 89 Mustang GT Convertible