I replaced the broken bolt with a substitute purchased from a prominent T parts supplier. With all the 7 or 8 spring leaf stresses on this 5/16” bolt,… why is it only Grade 5 ???I Just Replaced Front Spring Bolt…
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George House
Topic author - Posts: 2814
- Joined: Sun Jan 06, 2019 5:25 pm
- First Name: George
- Last Name: House
- * REQUIRED* Type and Year of Model Ts owned: ‘10 Maxwell AA, ‘11Hupp Model 20, Two 1914 Ford runabouts, 19 centerdoor, 25 C Cab,26 roadster
- Location: Northern Caldwell County TX
- MTFCA Life Member: YES
- Board Member Since: 1999
I Just Replaced Front Spring Bolt…
Howdy Forum Friends,…when I was laying under the axle greasing the APCO cap over the pitman ball I saw, to my chagrin, the absence of square nut below the main spring leaf 
I replaced the broken bolt with a substitute purchased from a prominent T parts supplier. With all the 7 or 8 spring leaf stresses on this 5/16” bolt,… why is it only Grade 5 ???
I replaced the broken bolt with a substitute purchased from a prominent T parts supplier. With all the 7 or 8 spring leaf stresses on this 5/16” bolt,… why is it only Grade 5 ???A Fine is a Tax for Doing Something Wrong….A Tax is a Fine for Doing Something RIGHT 
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jiminbartow
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- First Name: James
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- * REQUIRED* Type and Year of Model Ts owned: 1926 Coupe
- Location: Bartow, FL
- Board Member Since: 2001
Re: I Just Replaced Front Spring Bolt…
Regular bolts are grade 2. Grade 5 is a very strong bolt. The only stronger grade is grade 8. Grade 5 is more than strong enough for this application.
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Norman Kling
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- Joined: Tue Jan 08, 2019 1:39 pm
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- Last Name: Kling
- Location: Alpine California
Re: I Just Replaced Front Spring Bolt…
Basically the bolt is used to keep the leaves centered in the frame and in relation to each other. The spring clip keeps it tight to the frame.
Norm
Norm
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Allan
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- Last Name: Bennett
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- Location: Gawler, Australia
Re: I Just Replaced Front Spring Bolt…
Norm has nailed it. Once the spring is fitted in the frame the bolt does nothing but stop the leaves migrating. Any bolt will do that. The T bolts have a square head to match the square hole in the frame cross member, to make the location more positive.
Allan from down under.
Allan from down under.