SD 2 bbl carb screw needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71swb4x4 · 05-18-2011, 10:26 PM

I need one of the round headed (flat screwdriver) screws that holds a 2 bbl carb together. I have a 67 with a 292, and one of the four screws fell out. Does anyone have one of these screws?

**Ironhorse** · 05-18-2011, 10:42 PM

I "might" have one if you can post a pic with length and diameter sizes. Have several carb parts laying in a box, not sure what they came from. No promises but will look if I know what I'm looking for. Yours for postage if I have it.

71swb4x4 · 05-19-2011, 09:34 PM

I believe the bolt size is #12 and the thread count is 28 TPI.
From the bottom of the head to the end of the bolt it is about 15/16" long. The head is a little more about 3/16" thick. Total bolt length including head is about 1 1/8".

Here is a picture

71swb4x4 · 05-19-2011, 09:35 PM

I tired the local farm supply store and they have NOTHING in a #12-28. I found a #12 once and is was a #12-24.

**Ironhorse** · 05-20-2011, 07:22 AM

Thanks for the info on the carb screw, makes it easier to look for something when I know what I'm looking for.

Will check later today and get back to you.

**Ironhorse** · 05-20-2011, 12:45 PM

Sorry but can't help on this one. Checked all the odd carb screws I have and all are either too short or too long. 3/4 " and 1 5/16" in length.

71swb4x4 · 05-20-2011, 01:37 PM

Thanks for checking, I appreciate it. I will keep looking.

05-18-2011, 10:42 PM	#2
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,301	Re: 2 bbl carb screw needed I "might" have one if you can post a pic with length and diameter sizes. Have several carb parts laying in a box, not sure what they came from. No promises but will look if I know what I'm looking for. Yours for postage if I have it. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

05-19-2011, 09:34 PM	#3
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: 2 bbl carb screw needed I believe the bolt size is #12 and the thread count is 28 TPI. From the bottom of the head to the end of the bolt it is about 15/16" long. The head is a little more about 3/16" thick. Total bolt length including head is about 1 1/8". Here is a picture Attached Images __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

05-19-2011, 09:35 PM	#4
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: 2 bbl carb screw needed I tired the local farm supply store and they have NOTHING in a #12-28. I found a #12 once and is was a #12-24. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

05-20-2011, 07:22 AM	#5
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,301	Re: 2 bbl carb screw needed Thanks for the info on the carb screw, makes it easier to look for something when I know what I'm looking for. Will check later today and get back to you. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

05-20-2011, 12:45 PM	#6
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,301	Re: 2 bbl carb screw needed Sorry but can't help on this one. Checked all the odd carb screws I have and all are either too short or too long. 3/4 " and 1 5/16" in length. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

05-18-2011, 10:26 PM	#1
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	2 bbl carb screw needed I need one of the round headed (flat screwdriver) screws that holds a 2 bbl carb together. I have a 67 with a 292, and one of the four screws fell out. Does anyone have one of these screws? __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

05-20-2011, 01:37 PM	#7
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: 2 bbl carb screw needed Thanks for checking, I appreciate it. I will keep looking. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

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