Steel Pipe API-Line Couplings

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21 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Medium-Pressure Iron and Steel Threaded Pipe Fittings

With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.

Straight connectors with recessed threading have a short unthreaded space on each end, which allows for easy alignment when threading onto long lengths of pipe. They are also known as API line couplings.

Straight Connectors with Recessed Threading

For Use With: Air, Water, Oil, Natural Gas
Specifications Met: ASTM A105, ASTM A53
Pipe Nipples and Pipe: Use Schedule 160 or 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Material		Each
1/8	300 psi @ 72° F	Steel	43245K121	00000
1/4	300 psi @ 72° F	Steel	43245K122	00000
3/8	300 psi @ 72° F	Steel	43245K123	00000
1/2	300 psi @ 72° F	Steel	43245K124	00000
3/4	300 psi @ 72° F	Steel	43245K125	00000
1	300 psi @ 72° F	Steel	43245K126	00000
1 1/4	300 psi @ 72° F	Steel	43245K127	00000
1 1/2	300 psi @ 72° F	Steel	43245K129	00000
2	300 psi @ 72° F	Steel	43245K131	00000
3	300 psi @ 72° F	Steel	43245K132	00000
4	300 psi @ 72° F	Steel	43245K133	000000

Medium-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

A galvanized finish gives these fittings fair corrosion resistance. They have the strength to handle medium-pressure applications.

Straight Connectors with Recessed Threading

For Use With: Air, Water, Oil, Natural Gas
Specifications Met: ASTM A105, ASTM A53
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Material		Each
1/8	300 psi @ 72° F	Galvanized Steel	43245K361	000000
1/4	300 psi @ 72° F	Galvanized Steel	43245K362	00000
3/8	300 psi @ 72° F	Galvanized Steel	43245K363	00000
1/2	300 psi @ 72° F	Galvanized Steel	43245K364	00000
3/4	300 psi @ 72° F	Galvanized Steel	43245K365	00000
1	300 psi @ 72° F	Galvanized Steel	43245K366	00000
1 1/4	300 psi @ 72° F	Galvanized Steel	43245K367	00000
1 1/2	300 psi @ 72° F	Galvanized Steel	43245K368	00000
2	300 psi @ 72° F	Galvanized Steel	43245K369	00000
3	300 psi @ 72° F	Galvanized Steel	43245K371	000000

Medium-Pressure Iron and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized Ironand Steel Threaded Pipe Fittings

Medium-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings