UNEF Pipe Fittings | McMaster-Carr

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Straight-Thread Pipe Fittings

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20 Products

Screw-On Caps

Polyethylene

Thread onto male pipe and fittings for the most secure fit. These caps keep dust, paint, and coatings out of threads and pipe. They also protect from damage during manufacturing, shipping, and storage.

Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.

	Thread
	Size	Type	For OD	Inside Ht.	Flexibility	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Polyethylene







				For Straight-Thread Fittings

				5/8"-24	UNEF	5/8"	13/32"	Rigid	150	Red	100	1277K116	000000


				3/4"-20	UNEF	3/4"	1/2"	Rigid	150	Red	100	1277K118	00000
				7/8"-20	UNEF	7/8"	23/32"	Rigid	150	Red	100	1277K121	00000
				1 1/8"-18	UNEF	1 1/8"	15/32"	Rigid	150	Red	100	1277K123	00000
				1 1/4"-18	UNEF	1 1/4"	15/32"	Rigid	150	Red	100	1277K125	00000
				1 3/8"-18	UNEF	1 3/8"	15/32"	Rigid	150	Red	50	1277K127	00000

Oil Fittings

Note: Fittings do not hold oil; any oil dispensed into the fittings passes into the part to be lubricated.

Straight with Ball Check Valve

Fittings with a check valve prevent oil from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

UNEF Thread—UNEF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.

Zinc-Plated Brass—Zinc-plated brass fittings have good corrosion resistance.

							Each
	Material	Overall Ht.	Shank Lg.	Thread Lg.	Installation Clearance		1-9	10-Up
1/4"-32 Male UNEF Thread



		Zinc-Plated Brass	7/16"	7/32"	7/32"	3/8"	1211K1	000000	000000

90° Elbow with Self-Closing Hinged Cover

Image of Product. Front orientation. Contains Annotated. Oil Fittings. Oil Fittings, Self-Closing Hinged Cover, 90° Elbow.

Image of Attribute. Back orientation. Contains Annotated. Oil Fittings, Self-Closing Hinged Cover, 90° Elbow.

Fittings with a self-closing hinged cover block contaminants from entering equipment.

UNEF Thread—UNEF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.

Zinc—Zinc alloy fittings have mild corrosion resistance.

							Each
	Material	Overall Ht.	Shank Lg.	Thread Lg.	Installation Clearance		1-9	10-Up
1/4"-32 Male UNEF Thread



		Zinc	19/32"	3/16"	3/16"	1 1/16"	1227K12	000000	000000


		5/16"-32 Male UNEF Thread



				Zinc	25/32"	3/16"	3/16"	1 5/16"	1227K21	00000	00000

Straight with Self-Closing Hinged Cover

Male

Image of Attribute. Top orientation. Contains Annotated. Oil Fittings, Straight, Self-Closing Hinged Cover.

Fittings with a self-closing hinged cover block contaminants from entering equipment.

UNEF Thread—UNEF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.

Zinc-Plated Steel—Zinc-plated steel fittings have mild corrosion resistance.

							Each
	Material	Overall Ht.	Shank Lg.	Thread Lg.	Installation Clearance		1-9	10-Up
1/4"-32 Male UNEF Thread



		Zinc-Plated Steel	9/16"	5/32"	5/32"	11/16"	1229K11	000000	000000


		Zinc-Plated Steel	9/16"	3/16"	3/16"	3/4"	1229K13	00000	00000
		Zinc-Plated Steel	3/4"	1/4"	1/4"	3/4"	1229K15	00000	00000


		5/16"-32 Male UNEF Thread



				Zinc-Plated Steel	27/32"	1/4"	1/4"	13/16"	1229K28	00000	00000

Grease Fittings

Thread these fittings into motors, bearings, engine blocks, and other machinery to create a lubrication point. They’re also known as hydraulic grease fittings.

Straight with Male Thread

Zinc-Plated Steel—Zinc-plated steel fittings have mild corrosion resistance.

Ball Check Valve—Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

										Pkg.
	Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
5/16"-32 UNEF Thread



		Zinc-Plated Steel	21/32"	9/64"	15/64"	3/8"	10,000	Ball	10	1095K61	00000	00000

65° Elbow with Male Thread

Zinc-Plated Steel—Zinc-plated steel fittings have mild corrosion resistance.

Ball Check Valve—Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

										Pkg.
	Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
5/16"-32 UNEF Thread



		Zinc-Plated Steel	51/64"	11/64"	7/32"	3/8"	10,000	Ball	10	1095K63	000000	00000

Flexible Grease Gun Nozzles

Grease Gun Nozzles with Spring

Guard

Nozzles have threads on both ends for connecting a grease gun to a dispensing tip.

Grease Gun Nozzles with Spring Guard—Nozzles with spring guard have a steel spring guard that prevents kinking.

Nozzle				Nozzle Connection
Lg.	Material	Fitting Material	Max. Grease Outlet Pressure, psi	Thread Type	Pipe/Thread Size	Gender		Each







			Grease Gun Nozzles with Spring Guard

			18"	Buna-N	Steel	7,500	NPT UNEF	1/8 7/16"-28	Male Male	1524K41	000000


			24"	Buna-N	Steel	7,500	NPT UNEF	1/8 7/16"-28	Male Male	1524K42	00000
			30"	Buna-N	Steel	7,500	NPT UNEF	1/8 7/16"-28	Male Male	1524K82	00000
			36"	Buna-N	Steel	7,500	NPT UNEF	1/8 7/16"-28	Male Male	1524K43	00000
			42"	Polyurethane Rubber	Steel	10,000	NPT UNEF	1/8 7/16"-28	Male Male	1082K75	00000