Brass Grease Fittings | McMaster-Carr

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UN/UNF (SAE Straight)

Grease Fitting Style

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6,000 psi to 9,999 psi

10,000 psi or greater

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44 Products

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.

Brass fittings resist corrosion better than zinc-plated steel fittings.

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.

PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.

Straight with Male Threads

Straight with
Male
Threads

										Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
1/4"-28 UNF Threads
Brass	17/32"	5/32"	5/32"	9/32"	10,000	Ball	__	5	000000	00000	00000
Brass	19/32"	7/32"	7/32"	9/32"	10,000	Ball	__	5	000000	0000	0000
5/16"-24 UNF Threads
Brass	19/32"	7/32"	7/32"	11/32"	10,000	Ball	__	5	0000000	0000	0000
3/8"-24 UNF Threads
Brass	19/32"	7/32"	7/32"	7/16"	10,000	Ball	__	5	0000000	00000	0000
1/8 BSPT Threads
Brass	15mm	5.5mm	5.5mm	11mm	1,450	Ball	DIN 71412	5	00000000	00000	00000
M5 × 0.8 mm Metric Threads
Brass	15mm	5.5mm	5.5mm	7mm	1,450	Ball	DIN 71412	5	00000000	0000	0000
M6 × 0.75 mm Metric Threads
Brass	15mm	5.5mm	5.5mm	7mm	1,450	Ball	DIN 71412	5	00000000	0000	0000
M6 × 1 mm Metric Threads
Brass	14mm	4mm	4mm	7mm	10,000	Ball	DIN 71412	5	0000000	0000	0000
M8 × 1 mm Metric Threads
Brass	15mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	5	0000000	0000	0000
M8 × 1.25 mm Metric Threads
Brass	15mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	5	0000000	0000	0000
M10 × 1 mm Metric Threads
Brass	15mm	5.5mm	5.5mm	11mm	10,000	Ball	DIN 71412	5	0000000	00000	0000
M10 × 1.5 mm Metric Threads
Brass	15mm	5.5mm	5.5mm	11mm	1,450	Ball	DIN 71412	5	00000000	00000	00000
1/8 PTF-SAE Threads
Brass	19/32"	7/32"	7/32"	7/16"	10,000	Ball	__	5	0000000	00000	0000
Brass	11/16"	1/4"	19/64"	7/16"	10,000	Ball	__	5	0000000	00000	00000

90° Elbow with Male Threads

										Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
1/4"-28 UNF Threads
Brass	45/64"	7/32"	7/32"	11/32"	10,000	Ball	__	3	000000	000000	00000
M6 × 1 mm Metric Threads
Brass	18mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
M8 × 1 mm Metric Threads
Brass	18mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	1	0000000	0000	0000
M8 × 1.25 mm Metric Threads
Brass	18mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	3	0000000	00000	0000
M10 × 1 mm Metric Threads
Brass	20mm	5.5mm	5.5mm	11mm	10,000	Ball	DIN 71412	3	0000000	00000	00000

45° Elbow with Male Threads

										Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
1/4"-28 UNF Threads
Brass	59/64"	7/32"	7/32"	11/32"	10,000	Ball	__	1	000000	00000	00000
5/16"-24 UNF Threads
Brass	59/64"	7/32"	7/32"	11/32"	10,000	Ball	__	3	0000000	00000	0000
M6 × 1 mm Metric Threads
Brass	24mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
M8 × 1 mm Metric Threads
Brass	24mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
M8 × 1.25 mm Metric Threads
Brass	24mm	5.5mm	5.5mm	9mm	10,000	Ball	DIN 71412	1	0000000	0000	0000
M10 × 1 mm Metric Threads
Brass	25mm	5.5mm	5.5mm	11mm	10,000	Ball	DIN 71412	3	0000000	00000	00000

Pin-Style Grease Fittings

The pins on these fittings lock with dispensing tips for pin-style fittings to create a tight seal. Their brass bodies resist corrosion. They have a check valve that prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.They have PTF-SAE and NPTF (Dryseal) threads, which are compatible with NPT threads.

Zinc-plated steel fittings have mild corrosion resistance. Brass fitting is more corrosion resistant than zinc-plated steel fittings.

Straight with Male Threads

									Each
Body Material	Pin Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Max. Pressure, psi	Check Valve Type		1-9	10-Up
1/4 NPTF Threads
Brass	Zinc-Plated Steel	1 3/32"	5/16"	17/64"	17/32"	8,000	Ball	0000000	00000	00000
1/8 PTF-SAE Threads
Brass	Copper-Plated 400 Nickel	31/32"	17/64"	13/64"	7/16"	8,000	Ball	0000000	0000	0000

45° Elbow with Male Threads

									Each
Body Material	Pin Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Max. Pressure, psi	Check Valve Type		1-9	10-Up
1/8 NPTF Threads
Brass, Zinc-Plated Steel	Zinc-Plated Steel	1 1/2"	7/16"	7/32"	7/16"	8,000	Ball	0000000	00000	00000

Grease Fitting Adapters

When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.

Brass adapters resist corrosion better than zinc-plated steel adapters. PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.

Straight

Adapter

Connection
Male	Female	Material		Each
Adapters
UNF 1/4"-28	NPT 1/8	Steel	0000000	00000
NPT 1/8	NPT 1/4	Brass	000000000	0000
NPT 1/4	BSPT 1/8	Brass	00000000	00000
BSPT 1/8	NPTF 1/8	Brass	000000000	0000
BSPT 1/4	NPT 1/4	Brass	00000000	00000
Metric M8 × 1 mm	NPT 1/8	Brass	00000000	00000
Metric M8 × 1 mm	BSPT 1/8	Brass	00000000	00000
Metric M8 × 1.25 mm	NPT 1/8	Brass	00000000	00000
Metric M10 × 1.5 mm	NPT 1/8	Brass	00000000	0000
Metric M16 × 1.5 mm	NPT 1/8	Brass	00000000	00000
				Pkg.
UN/UNF (SAE Straight) 10-32	NPT 1/8	360 Brass	00000000	00000

60° Elbow

Connection
Male	Female	Material		Each
Adapters
NPT 1/8	NPT 1/8	Brass	00000000	000000

45° Elbow

Connection
Male	Female	Material		Each
Adapters
UNF 1/4"-28	NPT 1/8	Steel	0000000	000000
NPT 1/8	NPT 1/8	Brass	00000000	00000

Remote-Access Grease Fittings

Access difficult-to-reach lubrications points from up to 10 ft. away. These fittings are made of brass, so they resist corrosion. An integral check valve prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.

Cut the included tubing to your desired length before attaching fittings.

Grease Fitting

				Tube								Each
Thread Type	Pipe Size	Gender	Material	Fitting Material	Material	Lg., ft.	Bend Radius	Check Valve Type	For NLGI Viscosity Grade	Temp. Range, °F		1-5	6-Up
NPT	1/8	Male	Brass	Brass	Polyethylene Plastic	10	2 1/2"	Ball	0, 00, 1, 2, 3, 4	-10° to 180°	0000000	000000	000000

Optional Adapters

Shape	Connection	Material		Each
Straight	UNF 1/4"-28 Male × NPT 1/8 Female	Steel	0000000	00000
45° Elbow	UNF 1/4"-28 Male × NPT 1/8 Female	Steel	0000000	00000

Oil Fittings

Zinc-plated brass fittings have good corrosion resistance. Nickel-plated brass fittings are more corrosion resistant than zinc-plated brass fittings.

Fitting with a check valve prevents oil from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants. UNF and UNEF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.

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

Straight with Ball Check Valve

						Each
Material	Overall Ht.	Shank Lg.	Thread Lg.	Installation Clearance		1-9	10-Up
1/4"-32 Male UNEF Threads
Zinc-Plated Brass	7/16"	7/32"	7/32"	3/8"	000000	000000	000000