The Chevrolet and GMC Hubcap thread

[60-66]

The Hubcap Thread

Here are several examples of most of the 1960-1966 Chevrolet hubcaps by year, size and GM part number. Included are the G series hubcaps for 13 inch wheels, both 1/2 ton styles , clip and nub, along with 4x4 hubcaps and the 20 and 30 series truck hubcaps with measurements. Also some comparisons to reproduction hubcaps for 1966. If there is something written by mistake please let me know so it can be corrected.

Definition of terms, "Clip" and "Nub". You will see these terms used often in this thread. "Clip" for this thread refers to the type of rim the particular hubcap fits on and fastens to. These rims use clips that are riveted to the rim. Two different size inner rings were used inside the hubcap. 1/2 ton 6 lug, clip rims came in 15,16 and 17.5 diameter and used a 7 5/8 inside diameter hubcap. 3/4 to 1 ton clip 8 lug rims came in 15,16,17,17.5 and 19.5 diameter and used a 8 3/4 inside diameter hubcap. The term "Nub" is for the more common rim and hubcap where the hubcap fits over 3 nubs on 1961-1966 rims. Those rims came in 15 and 16 inch diameter and used a 10 1/8 inside diameter hubcap.

Corvairs come into this thread also. From my limited research of this model , 1961 1962 1963 Corvair Rampside trucks used the same hubcap as 1961-1963 C10 pickups. Corvairs however used a 14 inch "nub" wheel. 1964 Corvair rampside trucks also used the 1964 C10 hubcaps. 1964-1966 introduced G series and used a 13 inch rim and hubcap with the option of a 14 inch rim and the same hubcap as a C10. If theres any Corvair or G series enthusiasts that can shed more light here it might prove useful.

This first picture represents, almost, one of each hubcap available for 1960-1966. There are a few missing that I haven't found but for the most part each year has an example including the G-10 hubcaps for 13 inch wheels.



1960 Full wheel cover for 1/2 ton , same as 1956 Chevy car. Pictures courtesy of Ebay.



For 1960, Chevrolet carried over the same hubcap from 1957, 1958 and 1959 trucks. From left to right in the first picture; 1) 3/4 ton 4x4 front GM PT #3765837; 2)1957-1960 3/4-1 ton painted GM PT #3743591; 3) 1957-1960 3/4 ton-1 Ton Chrome GM PT #3743592; 4) 1957-1960 1/2 Ton 4x4 painted GM PT #3765832; 5) 1957-1960 1/2 ton painted GM PT # 3734031; 6) 1957-1960 1/2 ton Chrome GM PT # 3734032 .


Some comparison photos of the 1960 1/2 Ton VS 1960 3/4-1 ton hubcaps.






1960 4x4 Center hole measurement 1/2 ton .


1960 4x4 Center hole measurement 3/4 ton .


1961, 1962 and 1963 seems to be the years Chevrolet had the most hubcaps, all with different applications.
From top left to right. 1st Hubcap is technically a 1962-1963 GMC because of the red paint and carries a GMC only PT#. Chevy would have been solid white and it was used from 1961 to 1962 ONLY, GM PT # 3781648. This hubcap is a 1/2 ton Clip style 4x4 hubcap; 2) is a 1961-1963 painted 1/2 ton clip GM PT #3781650; 3) is a 1961-1963 chrome 1/2 ton clip GM PT #3781675; 4) is a 1961-1962 Chevy 4x4 1/2 ton NUB style hubcap GM PT #3781648; 5) is a 1961-1963 1/2 ton painted NUB GM PT #3780114 and 6) is a chrome 1961-1963 1/2 ton NUB GM PT #3780115.

Second row Left to right; 1) 1961-1963 3/4-1 ton chrome GM PT #3781676; 2) is a 1961-1963 3/4-1 ton painted GM PT #3781651 and 3) is a 1961-1962 3/4 ton 4x4 GM PT #3781652.

(For GMC only, the 4x4 hubcaps shown here are from 1962-1963 , Chevy used the 4x4 hubcap for 1961 and 1962 only. 1963 and up Chevy 4x4 trucks came without hubcaps.)



Same order as above but rear view.


1961, 1962, 1963 Half Ton Nub

1961, 1962, 1963 1/2 ton clip

1961, 1962, 1963 3/4 1 ton clip


Size height difference between 1/2 nub , 1/2 ton clip and 3/4-1 ton clip hubcaps.


1961, 1962 4x4 center hole 3/4 ton.

1961, 1962 4x4 center hole 1/2 ton.


For 1964 to 1965 Chevrolet hubcaps, the Chevrolet parts book refers to these as "first design" . I believe its been said that for 1966 they strengthened the hubcap with the ridge around the outer edge of the center triangular part of the hubcap.

1964-1965 top left to right. 1) 1964-1965 3/4-1 ton painted GM PT #3875621; 2) 1964-1965 3/4-1 ton chrome GM PT # 3875622; (empty space three NO PICTURE 1964-1965 1/2 ton painted clip GM PT # 3839984); 4) is a 1964-1965 1/2 ton clip chrome GM PT #3839982; 5) 1964-1965 painted nub GM PT #3839978; 6) 1964-1965 chrome Nub GM PT # 3839983. Bottom right is a 1964 1965 G-10 Chrome hubcap GM PT # 3848661 with the painted version being 3843809.


1964-1965 Rear view.






1964 1965 smooth face as compared to 1966 with ridge



1964 1965 G-10 13 inch hubcap GM PT #3843809 painted, 3848661 chrome .



G-10 Hubcap compared to C10 hubcap.





The 1966 hubcap is a one year only hubcap . The 1966 GM parts book refers to these as "Second design" . The newer the parts book you look in, these 1966 part numbers group 1964-1965 and 1966 as one hubcap. However that is not the way these trucks came off the assembly line but was GMs way of cutting "cost" , maybe and substituting one part for another. The parts history book shows one of the 1964 1965 part numbers was superseded by the 1966 hubcap as early as July of 1966 .

Below are all the 1966 hubcaps; 1) 1966 C20 C30 Painted GM PT #3875621; 2) 1966 C20 C30 Chrome GM PT #3875622; 3) 1966 C10 Clip Painted GM PT #3875625; 4) 1966 C10 Clip Chrome GM PT # 3875623; 5) 1966 C10 NUB painted GM PT#3875620; 6) 1966 C10 NUB Chrome GM PT # 3875624 . Bottom from Left to right; 7) 1966 G-10 Chrome for 13 inch wheels 3875630; 8) 1966 G-10 Painted for 13 inch wheels 3875631; 9) Bottom far right is the current reproduction C10 hubcap, see bottom of post for more information.



Rear view of 1966 hubcaps same order as above.


1966 C20 C30 Hubcap measurement.

1966 C10 Clip style hubcap measurement.

1966 C10 NUB style hubcap measurement

1966 G-10 Van hubcap measurement.


1966 Half ton Nub hubcaps. NOS GM on the left compared to current reproduction on the right. The hubcap on the far right, the bowtie "wings" are considerably shorter top to bottom and the center square is taller. The overall stamping is more squared off and has sharper corners. This reproduction hubcap is still chrome over brass like the original chrome hubcaps. It should be mentioned that none of the chrome hubcaps were Stainless steel in this 1960-1966 era. All of the painted hubcaps are steel.




Here is another example of a second reproduction hubcap in the center of the picture below. Its a much closer version but its been discontinued now for roughly ten years. Here's a comparison of all three. I measured them with a dial caliper. From left to right; 1) original on left; 2) the "Good" reproduction in the center and 3) the currently available hubcap far right.

For the bowtie "wings" I will call them:
1) Original measures .593
2) GOOD reproduction .500
3) reproduction .463

Center of the bowtie or center square:
1) Original measures .890 tall
2) GOOD reproduction .820 tall
3) Current reproduction .992 tall

Now you can see why the one on the far right is so disproportionate to the others. Also notice the ridge around the center is more rounded on the first two, compared to the one on the far right .