If you ever wanted to know the size of factory U-Nuts

[71CHEVYSHORTBED402]

Here you go. Spent WAY more time measuring than a person should, ("damn your eyes"......"too late"). Anyway, should be right and feel free to correct.

At some point this list will be a mile long. Get to inventory the parts (fun) before I have them phosphate coated or zinc plated. I just went through the U-Nuts to see if I can buy matching new.

THIS HAS BEEN UPDATED. Picture was gone, so added this instead.


Placement & Part / Description / Thread size

FAN SHROUD U-NUTS U-NUTS - 3/4 (W) X 5/8 (L), WITH A 7/32 CENTER HOLE TO EDGE 1/4

MARKER LIGHT U-NUTS U-NUTS - 1/2 X 5/8, WITH A 1/4 CENTER HOLE TO EDGE #8

TAIL & REVERSE HOUSINGS J-NUTS J-NUTS - 1/2 X 5/8, WITH A 3/8 CENTER HOLE TO EDGE #10

HEADLIGHT BEZEL J-NUTS J-NUTS - 7/16 (W) X 21/32 (L), WITH A 3/8 CENTER HOLE TO EDGE #8

GRILLE U-NUT U-NUT - 5/8 (W) X 1 (L), WITH A 9/16 CENTER HOLE TO EDGE 5/16-18

GRILLE U-NUTS U-NUTS - 7/16 (W) X 11/16 (L), WITH A 3/8 CENTER HOLE TO EDGE 1/4

GRILLE U-NUT U-NUT - 3/4 (W) X 11/16 (L), WITH A 3/8 CENTER HOLE TO EDGE 1/4

A/C VENTS (outer vents) J-NUTS - 7/16 (W) X 9/16 (L), WITH A 3/8 CENTER HOLE TO EDGE #8

COWL PANEL J-NUTS J-NUTS - 1/2 (W) X 5/8 (L), WITH A 1/2 CENTER HOLE TO EDGE #10

INNER FENDER U-NUTS 21/32 (W) X 1 (L), WITH A 9/16 CENTER HOLE TO EDGE. FLOATING SQUARE NUTS 5/16-18

RADIO BRACKET/SUPPORT U-NUTS 1/2 (W) X 1 (L), WITH 1/2 CENTER HOLE TO EDGE 1/4"

DASH PAD J-NUTS 7/16 (W) X 5/8 (L), WITH 3/8 CENTER HOLE TO EDGE #8

INSTRUMENT CLUSTER 7/16 (W) X 5/8 (L), WITH 3/8 CENTER HOLE TO EDGE #8

ASH TRAY BRACKET 1/2 (W) X 11/16 (L), WITH 3/8 CENTER HOLE TO EDGE #8

GLOVE BOX DOOR 1/2 (W) X 7/8 (L), WITH 5/8 CENTER HOLE TO EDGE #10

DOOR (1972 Only) 1/2 (W) X 11/16 (L), WITH PENDING CENTER HOLE TO EDGE #10