66 C10 Seat Track to Floor Bolt Size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Afirehawk1 · 02-23-2019, 05:54 PM

Looking for the correct bolts to mount seat track to the floor
Thanks

**The Rocknrod** · 02-23-2019, 06:41 PM

5/16"-18 usage goes back into the 50s. I can go get an exact length in a minute. 1/2" Long flange head with a star washer.

**aerotruk63** · 02-23-2019, 07:58 PM

Same bolts I believe that fasten the track to the seat frame. Stole all my bolt from the underside of another seat. Shiny!

**The Rocknrod** · 02-23-2019, 08:26 PM

Quote:

Originally Posted by aerotruk63

Same bolts I believe that fasten the track to the seat frame. Stole all my bolt from the underside of another seat. Shiny!

Exactly. I kept mine separated and they are shinny compared to the floor units.

Bolt Barn on eBay has 5/16"-18 Flange Head bolts by the way.

**aerotruk63** · 02-23-2019, 08:27 PM

According to an American parts book. 5/16-18 . 3/4" long with a 3/8" hex. washer head ( non Standard ) incorporated star washer. Cadmium plated . POINT D which is self tapping 442751 0riginal part number. This is the closest I can find after checking mine on 3 1963's.

**aerotruk63** · 02-23-2019, 08:34 PM

Comparing the parts book to the Rocknrod example , they must consider overall length of 3/4" not the standard measurement of under the head to end of screw. Therefore if you want bolts that will fit the correct dimension would be in the 1/2" range as stated. A 5/16 bolt would have a 1/2" hex head usually. Thread diameter plus 3/16 is the usual head indicator in the smaller bolts.

**The Rocknrod** · 02-23-2019, 08:47 PM

Now days it's hard to find a captured or incorporated star washer flange bolt. At least I haven't been successful.
https://www.ebay.com/sch/m.html?_odk...F2%22&_sacat=0
https://www.boltdepot.com/Flange_bol...l_5_16-18.aspx
Maybe Avueco? But i'd have to go get a cup of coffee to search that catalog.

Afirehawk1 · 02-23-2019, 09:31 PM

Thanks everyone!!

02-23-2019, 05:54 PM	#1
Afirehawk1 Registered User Join Date: Feb 2016 Location: Valrico, Florida Posts: 661	66 C10 Seat Track to Floor Bolt Size Looking for the correct bolts to mount seat track to the floor Thanks

02-23-2019, 06:41 PM	#2
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 66 C10 Seat Track to Floor Bolt Size 5/16"-18 usage goes back into the 50s. I can go get an exact length in a minute. 1/2" Long flange head with a star washer. Attached Images __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? Last edited by The Rocknrod; 02-23-2019 at 06:53 PM.

02-23-2019, 07:58 PM	#3
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,625	Re: 66 C10 Seat Track to Floor Bolt Size Same bolts I believe that fasten the track to the seat frame. Stole all my bolt from the underside of another seat. Shiny! __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

02-23-2019, 08:27 PM	#5
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,625	Re: 66 C10 Seat Track to Floor Bolt Size According to an American parts book. 5/16-18 . 3/4" long with a 3/8" hex. washer head ( non Standard ) incorporated star washer. Cadmium plated . POINT D which is self tapping 442751 0riginal part number. This is the closest I can find after checking mine on 3 1963's. __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

02-23-2019, 08:34 PM	#6
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,625	Re: 66 C10 Seat Track to Floor Bolt Size Comparing the parts book to the Rocknrod example , they must consider overall length of 3/4" not the standard measurement of under the head to end of screw. Therefore if you want bolts that will fit the correct dimension would be in the 1/2" range as stated. A 5/16 bolt would have a 1/2" hex head usually. Thread diameter plus 3/16 is the usual head indicator in the smaller bolts. __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

02-23-2019, 08:47 PM	#7
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: 66 C10 Seat Track to Floor Bolt Size Now days it's hard to find a captured or incorporated star washer flange bolt. At least I haven't been successful. https://www.ebay.com/sch/m.html?_odk...F2%22&_sacat=0 https://www.boltdepot.com/Flange_bol...l_5_16-18.aspx Maybe Avueco? But i'd have to go get a cup of coffee to search that catalog. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

02-23-2019, 09:31 PM	#8
Afirehawk1 Registered User Join Date: Feb 2016 Location: Valrico, Florida Posts: 661	Re: 66 C10 Seat Track to Floor Bolt Size Thanks everyone!!



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