POL Hard Nose

1 inch 20 Female Swivel
Most commonly used on the Small Gas
Grills which use disposable bottles.

1 inch 20 Male Swivel
Most commonly used on the Small Gas
Grills which use disposable bottles.

Male Soft Nose with Platic Hand Wheel.

Inverted 1/4 inch Male Flare

Inverted 1/4 inch Female Flare
And this is where it is most commonly used,
In a Gas Regulator

1/2 inch Flare on Left
3/8 inch Flare on the Right
This whole part is also called a Reducer

Male Nipple Pipe Thread

Female Swivel Left Hand

Also known as Male ACME fitting

Female 3/8 inch Swivel