Inch (Imperial) Plain to Threaded Fittings

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The Difference Between Taper and Parallel Threads (6mins) - Summary available at bottom of page

Inch Plain Socket to FBSP PVC Socket Coupler
Inch Plain Socket to Reinforced FBSP PVC Socket Coupler
Inch Plain Socket to FNPT PVC Socket (USA Thread)
Inch Plain Socket to FBSP PVC 90 Deg Elbow

Inch Plain Socket to Reinforced FBSP PVC 90 Deg Elbow
Inch Plain Socket to FBSP PVC Tee
Inch Plain Socket to Reinforced FBSP PVC Tee
Inch Plain Socket to MBSP PVC Adaptor

Inch Plain Socket to Male NPT Thread (USA Thread)
Inch Plain Socket to FBSP PVC Union
Inch Plain Spigot to FBSP PVC Adaptor
Inch Plain Spigot to Reinforced FBSP PVC Adaptor

Inch Plain to Threaded PVC Nipple
Inch Plain Spigot PVC Tank Connector/Bulkhead
Inch Plain to FBSP Brass PVC Composite Union
Inch Plain to MBSP Brass PVC Composite Union

Inch Plain to Threaded PVC Reducing Bush
Inch Plain: NPT PVC Reducing Bush
Inch Hosetail

Manufacturers often differ on the type of thread they make their fittings with - some make their male threads tapered and their female parallel, while others make their males tapered and female tapered too. Make sure you know what kind of thread your fitting has before you try thread it in to another fitting. Taper and parallel threads look almost exactly the same to the naked eye, but they do have a difference. A taper thread's base starts off wide and ends much narrower at the far end of the thread, meaning the diameter of the thread gets less the further down the thread you go. A parallel thread, however, has the same diameter all the way along from the base to the end.

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