What are these fuel line fittings?

Fuel Line Products

Aircraft Plumbing: Flexible Lines - KITPLANES

MV Agusta FAQ: Fuel Line Fittings

The quickest and best way to do service repairs on your carb without having to completely drain the fuel line. Want to remove your tank without

MOTION PRO QUICK RELEASE FUEL LINE FITTING - DUAL SHUT OFF - 1/4

Feature: Good quality material Nylon for fuel/gas and other common fluid types, it is durable, long life for use. Allows you to quickly connect the

2pcs Fuel Line Quick Connect Straight Push-On Single Barb Fuel Hose Adapter Connector for 5/16 to 3/8 Rubber Tube

Stens 1/4 in. ID Low Permeation Fuel Line for Excellent Fitting Retention, Provides Great Seal for Optimum Safety at Tractor Supply Co.

Fuel Line Tidy XWeb Forums v3

Ford 6.7L Fuel Supply Line Repair Kit w/ Quick Connect Fittings

5.3 LM7 w/ Fuel Return Line routing

Help with fuel line fittings - Pelican Parts Forums

LT1 fuel line/fittings thread - Third Generation F-Body Message Boards

3/8 Fuel Line Fitting