API

American Pipe Industrial. This is a tapered thread commonly used in the US. Also refered to as NPT (National Pipe Thread) or NPTF (National Pipe Thread Fine).

Click here for help in identifying threads

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A	AC Air Compressor Air Dryer Air Filter Air Flow Air Fuse Air Lubrication Air Lubricator Air Pig Air Receiver Air Regulator Air Reservoir Air Tank Alternating Current Ambient Air ANSI API Application Dryer ASA ASME	top
B	Bar Bonded Seal Bonded Washer Boyle's Law Branch Leg BSF BSPP BSPT BSW	top
C	CF8M CFM Charle's Law Check Valve Chicago Coupling Clevis Coalescing Filter Compressed Air Cylinder Compressed Air Dryer Compressed Air Filter Compressed Air Filtration Compressed Air Flow Compressed Air Fuse Compressed Air Lubrication Compressed Air Lubricator Compressed Air Receiver Compressed Air Regulator Compressed Air Tank Compressed Air Valve Compressor Condensate Contaminant Coupling Cylinder	top
D	DC Desiccant Dew Point Direct Current Displacement Dowty Bonded Seal Dowty Washer Drain Valve Drop Leg Dryer	top
E	Eliminizer Ethylene Glycol	top
F	FAD FAIR Filter Filter Bowl Filter Element Filter Head Filter Housing Filter Regulator Lubricator Filtration Flange Free Air Delivery Fridge Dryer FRL	top
G	Gauge Glycol	top
H	Hertz High Volume Low Pressure Horse Power HP HVLP Hz	top
I	ID IEC	top
J	JIC JIS Threads	top
K	Kelvin Kilowatt kW	top
L	Liquid Petoleum Gas LPG Lubrication Lubricator	top
M	Membrane Dryer Metric Heavy Metric Light Metric Threads Micron MSDS Munsen Ring	top
N	Non Return Valve NPSM NPT Nylon	top
O	O Ring Face Seal OD OEM Oil Free Oil Water Separator ORFS	top
P	Pipe Ring Pneumatic Pneumatic Cylinder Pneumatic Ram Pneumatic Valve Point Of Use Polyamid Pounds Per Square Inch Pressure Pressure Dew Point Pressure Drop Pressure Gauge Pressure Relief Valve PSI PTF PTFE	top
Q	Quick Release Coupling	top
R	Refrigeration Dryer Regulator Relief Valve RILSAN Ring Main	top
S	SCFM SDS Separator SI Street Elbow	top
T	Teflon	top
U	UNI-EN 10226/1 UNI-ISO 228/1	top
V	Valve	top
W	Weld nipple Working Pressure WP	top