Dorman 680-104CD exhaust manifold nut for the 1953 Chevrolet Corvette 6-cylinder 3.9L, the 1953-1955 Corvette 6-cylinder 3.8L, the 1955-1956 Corvette V8 4.3L, the 1957-1961 Corvette V8 4.6L, the 1962-1968 Corvette V8 5.3L, the 1965 Corvette V8 6.5L, the 1966-1969 Corvette V8 7.0L, the 1968 Corvette V8 5.4L, the 1969-1982 Corvette V8 5.7L, the 1970-1974 Corvette V8 7.4L and the 1980 Corvette V8 5.0L threads onto a stud to hold the exhaust manifold clamped in place. A snug nut keeps exhaust gas inside the exhaust path.
- Brass hex nut with a 3/8-16 coarse SAE thread cut inside
- 9/16 in hex size and 0.31 in inside diameter
- Ball seat type with a standard nut grade
- Non-locking nut with no washer attached
- Six hex nuts in each package
Quick facts
- Part: Dorman 680-104CD exhaust manifold nut
- Fits: the 1953 Chevrolet Corvette 6-cylinder 3.9L, the 1953-1955 Corvette 6-cylinder 3.8L, the 1955-1956 Corvette V8 4.3L, the 1957-1961 Corvette V8 4.6L, the 1962-1968 Corvette V8 5.3L, the 1965 Corvette V8 6.5L, the 1966-1969 Corvette V8 7.0L, the 1968 Corvette V8 5.4L, the 1969-1982 Corvette V8 5.7L, the 1970-1974 Corvette V8 7.4L and the 1980 Corvette V8 5.0L
- Material: Brass
- Condition: New
A ticking exhaust sound or soot streaks near the manifold can mean a loose nut, a missing nut or another exhaust leak. Before replacing the nut, look at the studs and nuts with the engine off and cool for stripped threads or soot trails, and leave any leak you cannot see to a shop.
Fits
This nut is a direct-fit replacement for the 1953 Chevrolet Corvette 6-cylinder 3.9L, the 1953-1955 Corvette 6-cylinder 3.8L, the 1955-1956 Corvette V8 4.3L, the 1957-1961 Corvette V8 4.6L, the 1962-1968 Corvette V8 5.3L, the 1965 Corvette V8 6.5L, the 1966-1969 Corvette V8 7.0L, the 1968 Corvette V8 5.4L, the 1969-1982 Corvette V8 5.7L, the 1970-1974 Corvette V8 7.4L and the 1980 Corvette V8 5.0L. The fitment gives a quantity of one per application, and this package holds six nuts.
Specifications
Fit and size
- Thread: 3/8-16, coarse, SAE, clockwise, threaded inside
- Hex size: 9/16 in
- Inside diameter: 0.31 in
- Height: 0.628 in
- Pieces in package: 6
Build and materials
- Type: hex nut
- Material: brass
- Finish: brass
- Seat type: ball
- Nut grade: standard
- Locking: no
- Washer attached: no
- Heat hardened: no
- Condition: new
- Country of origin: India
In the box
Six hex nuts.
Interchange: 838780
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Will Dorman 680-104CD fit a 1969-1982 Chevrolet Corvette V8 5.7L?
Yes. Dorman 680-104CD fits the 1969-1982 Chevrolet Corvette V8 5.7L, along with the other Corvette years and engines named on this page.
How many nuts come in a package of this exhaust manifold nut?
The package holds six hex nuts. None of the nuts has a washer attached.
What thread and hex size does the Dorman 680-104CD exhaust manifold nut have?
This brass nut has a 3/8-16 coarse SAE thread cut inside, running clockwise. The hex size is 9/16 in and the inside diameter is 0.31 in.
What can a loose or missing exhaust manifold nut sound like?
A ticking exhaust sound or soot streaks near the manifold can mean a loose or missing nut, or another exhaust leak.
Is 838780 the same as Dorman 680-104CD?
Yes. 838780 is listed as an interchange number for Dorman 680-104CD, a brass 3/8-16 exhaust manifold nut.
