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#1
05-28-2023, 06:16 PM
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Rear spoiler mounting nuts
Can some one tell me the Size of the rear spoiler attaching nuts does 1/4-20 sound right….Chris
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 1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's
Last edited by cnc; 05-28-2023 at 06:26 PM. |
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#2
05-28-2023, 10:44 PM
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Yes, 1/4" -20 nuts with loose washers. Larger for main body #4801719, small washers for each end where no clearance #4821092, plus the sealing washers #7583551, only came in large. Repro parts pic below.
 70-81 rear spoiler fasteners 4801719 large washer nuts 4821092 small washer nuts 7583551 sealing washers all 1 sz by Ben, on Flickr
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#3
05-29-2023, 08:46 PM
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Thanks appreciate it…
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1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's
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#4
05-31-2023, 11:29 PM
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the original ones had a washer attached to the nut that could freely rotate - not a flared bottom on the nut.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#5
06-01-2023, 03:18 AM
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That might be year specific. The later years definitely had pic style with teeth on washer edges.
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#6
06-01-2023, 07:12 AM
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Took some pics. These are the only type I've seen, these are all replated original GM. Are you saying the early years were different?
 GM original tunk spoiler nuts replated 4821092 small 4801719 large (1) by Ben, on Flickr GM original tunk spoiler nuts replated 4821092 small 4801719 large (2) by Ben, on Flickr
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#7
06-01-2023, 09:16 AM
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unless I am mistaken, those are all different than the ones pictured in post #2;
those all have the attached washers. The picture i post two appeared to show flared nuts.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#8
06-01-2023, 10:21 AM
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Aah I understand what you are saying, dodgy ad pics with cut n paste multiples.
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#9
06-01-2023, 02:30 PM
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Both pics are of the same type of nut. They are KepsNuts.
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#10
06-01-2023, 02:34 PM
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ok.
That may very well be the case. My interpretation of the picture attached to post #2 was that those (stated reproduction) nuts didn't look like the correct ones; I didn't interpret that picture as them being two-piece nuts. If I am wrong, I apologize.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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