I am changing from a step bumper to the sport bumper and picked up a pair of rear bumper brackets but the top and bottom bumper mounting holes are square and measure 11/16" x 1 1/8"
Bumper bolt nuts
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F100 Dad
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Bumper bolt nuts
Are there special nuts that I should use with the carriage bolts when mounting a styleside contour (sport) bumper to the rear frame brackets?
I am changing from a step bumper to the sport bumper and picked up a pair of rear bumper brackets but the top and bottom bumper mounting holes are square and measure 11/16" x 1 1/8"
I am changing from a step bumper to the sport bumper and picked up a pair of rear bumper brackets but the top and bottom bumper mounting holes are square and measure 11/16" x 1 1/8"
- 1970 Sport Custom long bed, 360 C6 2WD -
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sargentrs
- 100% FORDified!
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Re: Bumper bolt nuts
Not to my knowledge. I just bought a new sport bumper and mtg bracket kit (thanks Brandon!) And I had the OEM step bumper. The bolts/nuts to mount the old brackets to the frame were regular type bolts and nuts. The carriage bolt nuts on both the old and new bumpers were plain nuts too. Once I got 'em broke loose, they spun off by hand. All nuts had lock washers behind them too.
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
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F100 Dad
- New Member
- Posts: 76
- Joined: Fri Apr 19, 2013 3:37 pm
Re: Bumper bolt nuts
Are your carriage bolt holes in your brackets round and about 9/16"? Mine are rectangular and so big the 1/2" nuts pass right through them.sargentrs wrote:Not to my knowledge. I just bought a new sport bumper and mtg bracket kit (thanks Brandon!) And I had the OEM step bumper. The bolts/nuts to mount the old brackets to the frame were regular type bolts and nuts. The carriage bolt nuts on both the old and new bumpers were plain nuts too. Once I got 'em broke loose, they spun off by hand. All nuts had lock washers behind them too.
- 1970 Sport Custom long bed, 360 C6 2WD -
-
F100 Dad
- New Member
- Posts: 76
- Joined: Fri Apr 19, 2013 3:37 pm
Re: Bumper bolt nuts
Are your carriage bolt holes in your brackets round and about 9/16"? Mine are rectangular and so big the 1/2" nuts pass right through them.sargentrs wrote:Not to my knowledge. I just bought a new sport bumper and mtg bracket kit (thanks Brandon!) And I had the OEM step bumper. The bolts/nuts to mount the old brackets to the frame were regular type bolts and nuts. The carriage bolt nuts on both the old and new bumpers were plain nuts too. Once I got 'em broke loose, they spun off by hand. All nuts had lock washers behind them too.
- 1970 Sport Custom long bed, 360 C6 2WD -
-
sargentrs
- 100% FORDified!
- Posts: 9866
- Joined: Fri Jun 22, 2007 9:30 am
- Location: Georgia, Jasper
Re: Bumper bolt nuts
Shows you how the memory plays tricks as you get older. I just went to the basement and checked and yes, the slots in the bracket are the same as you said. There's a big heavy washer behind the nut. The base of the carriage head bolt is he same size as the square hole in the bumper but I guess the slots in the bracket allow for adjustment. I'll upload a pic when I get to my computer.
Edit to add pics:
Edit to add pics:
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Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
-
F100 Dad
- New Member
- Posts: 76
- Joined: Fri Apr 19, 2013 3:37 pm
Re: Bumper bolt nuts
Got it! Just use some big old washers and it should be good.
Thanks a bunch for the info and the great pics.
Thanks a bunch for the info and the great pics.
- 1970 Sport Custom long bed, 360 C6 2WD -
-
sargentrs
- 100% FORDified!
- Posts: 9866
- Joined: Fri Jun 22, 2007 9:30 am
- Location: Georgia, Jasper
Re: Bumper bolt nuts
My pleasure! Let us see when you get it mounted. 
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.