NPTF Grease Fittings | McMaster-Carr

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59 Products

About Grease Gun Components

About Pressure-Relief Valves

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.

Zinc-plated steel fittings have mild corrosion resistance.

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.

Straight with Male Threads

Straight with
Male
Threads

									Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
3/8 NPTF Threads
Zinc-Plated Steel	51/64"	5/16"	5/16"	43/64"	10,000	Ball	5	0000000	000000	000000

Straight with Female Threads

									Pkg.
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
1/8 NPTF Threads
Zinc-Plated Steel	1"	9/32"	9/32"	1/2"	10,000	Ball	10	0000000	000000	000000

Leakproof Grease Fittings

Keep thin grease from leaking out—the check valve in these fittings has a Buna-N seat that creates a tighter seal than check valves in other grease fittings. The valve stays closed when not in use to keep out dirt and other contaminants. Fittings are zinc-plated steel, which has mild corrosion resistance. They're also known as hydraulic grease fittings. They have PTF-SAE and NPTF (Dryseal) threads, which are compatible with NPT threads.

Straight with Male Threads

									Pkg.
Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
1/8 NPTF Threads
Zinc-Plated Steel	1"	33/64"	11/32"	7/16"	10,000	Ball	5	0000000	000000	000000

90° Elbow with Male Threads

									Pkg.
Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
1/8 NPTF Threads
Zinc-Plated Steel	31/32"	25/64"	17/64"	7/16"	5,000	Disc	1	0000000	00000	00000

30° Elbow with Male Threads

									Pkg.
Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
1/8 NPTF Threads
Zinc-Plated Steel	1 7/32"	25/64"	17/64"	7/16"	5,000	Disc	5	0000000	000000	000000

Button-Head Grease Fittings

Often used on earth movers, mining equipment, and other heavy machinery, these fittings have a T-shaped top that holds the dispensing tip in place so it won’t pop off when adding grease. They're best for machinery requiring high volumes of grease because they let more grease pass through than standard grease fittings, thanks to a larger opening. 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.

Zinc-plated steel fittings have mild corrosion resistance. 303 stainless steel fittings are more corrosion resistant than zinc-plated steel fittings and have good chemical resistance. 316 stainless steel fittings resist corrosion and chemicals better than 303 stainless steel fittings and can be used in saltwater environments.

PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads.

Straight with Male Threads

									Each
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Head Dia.	Max. Pressure, psi	Check Valve Type		1-9	10-Up
1/8 NPTF Threads
303 Stainless Steel	45/64"	3/16"	9/32"	43/64"	5/8"	10,000	Ball	0000000	000000	000000
316 Stainless Steel	5/8"	15/64"	15/64"	19/32"	5/8"	1,450	Ball	0000000	00000	00000
1/4 NPTF Threads
Zinc-Plated Steel	53/64"	13/32"	27/64"	5/8"	5/8"	6,000	Plunger	0000000	0000	0000
Zinc-Plated Steel	1 3/8"	33/64"	19/32"	7/8"	7/8"	14,500	Plunger	0000000	0000	0000
303 Stainless Steel	53/64"	1/4"	13/32"	43/64"	5/8"	10,000	Ball	0000000	00000	00000
316 Stainless Steel	53/64"	7/16"	7/16"	43/64"	5/8"	1,450	Ball	0000000	00000	00000
3/8 NPTF Threads
Zinc-Plated Steel	61/64"	13/32"	31/64"	3/4"	5/8"	6,000	Plunger	0000000	0000	0000
Zinc-Plated Steel	1 5/16"	13/32"	9/16"	7/8"	7/8"	10,000	Plunger	0000000	00000	0000
303 Stainless Steel	59/64"	1/2"	1/2"	3/4"	5/8"	10,000	Ball	0000000	00000	00000
1/2 NPTF Threads
Zinc-Plated Steel	1 1/16"	1/2"	1/2"	7/8"	7/8"	8,000	Plunger	0000000	0000	0000
Zinc-Plated Steel	1 1/16"	17/32"	35/64"	7/8"	5/8"	6,000	Plunger	0000000	0000	0000

Straight with Female Threads

									Each
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Head Dia.	Max. Pressure, psi	Check Valve Type		1-9	10-Up
1/8 NPTF Threads
Zinc-Plated Steel	31/32"	13/32"	13/32"	5/8"	5/8"	6,000	Plunger	0000000	00000	00000

Flush-Style Grease Fittings

The nipple doesn't stick out, so these fittings fit in tight spaces and won't be damaged if something knocks into them. 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.

Zinc-plated steel fittings have mild corrosion resistance.

Install Styles A, B, and D with a slotted screwdriver. Install Style C with a hex wrench.

NPTF (Dryseal) threads are compatible with NPT threads.

											Pkg.
Style	Material	Overall Ht.	Thread Lg.	Shank Lg.	Slot Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Pkg. Qty.		1-9	10-Up
Straight with Male Threads
1/8 NPTF Threads
A	Zinc-Plated Steel	23/64"	19/64"	23/64"	13/32"	__	10,000	Ball	5	00000000	00000	00000
B	Zinc-Plated Steel	17/32"	17/32"	17/32"	3/8"	__	10,000	Ball	3	00000000	0000	0000
1/4 NPTF Threads
B	Zinc-Plated Steel	9/16"	9/16"	9/16"	35/64"	__	10,000	Ball	1	00000000	0000	0000
3/8 NPTF Threads
C	Zinc-Plated Steel	49/64"	31/64"	39/64"	__	3/4"	10,000	Ball	1	00000000	00000	00000
3/4 NPTF Threads
C	Zinc-Plated Steel	7/8"	29/64"	39/64"	__	1 1/16"	10,000	Ball	1	00000000	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

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.

Zinc-plated steel adapters have mild corrosion resistance. Brass adapters resist corrosion better than zinc-plated steel adapters. 303 stainless steel adapters are more corrosion resistant than brass adapters and have good chemical resistance.

PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads. SAE-LT threads are tapered but designed to be installed into a 1/4"-28 straight-thread UNF hole.

Straight

Adapter

Connection
Male	Female	Material		Each
Adapters
SAE-LT 1/4"-28	NPTF 1/8	Zinc-Plated Steel	0000000	00000
SAE-LT 1/4"-28	NPTF 1/8	303 Stainless Steel	0000000	00000
BSPT 1/8	NPTF 1/8	Brass	000000000	0000

90° Elbow

Connection
Male	Female	Material		Each
Adapters
NPTF 1/8	NPTF 1/8	303 Stainless Steel	0000000	000000
SAE-LT 1/4"-28	NPTF 1/8	Zinc-Plated Steel	0000000	00000
SAE-LT 1/4"-28	NPTF 1/8	303 Stainless Steel	0000000	00000

45° Elbow

Connection
Male	Female	Material		Each
Adapters
NPTF 1/8	NPTF 1/8	303 Stainless Steel	0000000	000000
SAE-LT 1/4"-28	NPTF 1/8	Zinc-Plated Steel	0000000	0000
SAE-LT 1/4"-28	NPTF 1/8	303 Stainless Steel	0000000	00000

Grease-Dispensing Tips

Attach dispensing tips to nozzles to deliver lubricant through grease fittings or to bare lubrication points.

	Dispensing Tip				Dispensing Tip Connection
Style	Lg.	Style	Material	Max. Grease Outlet Pressure, psi	Thread Type	Pipe Size	Gender	Features		Each
For Standard Grease Fittings
A	1 7/16"	Straight	Steel	10,000	NPTF	1/8	Female	__	0000000	000000
A	1 9/16"	Straight	Steel	10,000	NPTF	1/8	Female	__	000000	00000
F	4"	Adjustable Angle	Steel	10,000	NPTF	1/8	Female	360° Rotation	0000000	000000
For 5/8" Button-Head Style Grease Fittings
G	1 5/8"	90° Angle	Steel	10,000	NPTF	1/8	Female	__	0000000	00000
For 7/8" Button-Head Style Grease Fittings
G	1 1/4"	90° Angle	Steel	15,000	NPTF	1/8	Female	__	0000000	00000
For Pin-Style Grease Fittings
K	2"	Straight	Steel	10,000	NPTF	1/8	Female	__	0000000	00000
K	2 1/8"	Straight	Steel	10,000	NPTF	1/8	Male	__	0000000	00000
L	1 11/16"	Straight	Steel	10,000	NPTF	1/8	Female	__	0000000	00000
For Flush-Style Grease Fittings
N	1 1/4"	Straight	Steel	10,000	NPTF	1/8	Female	__	000000	00000
P	2"	Straight	Steel	10,000	NPTF	1/8	Female	__	0000000	00000

Repair Kit for 1091K42	0000000	Each	0000000
Repair Kit for 1091K44	0000000	Each	000000

Flexible Grease Nozzles with Dispensing Tip

Straight Dispensing Tip

These nozzles come with a dispensing tip and have threads on one end for connecting to a grease gun.

Nozzle		Dispensing Tip				Nozzle Connection
Lg.	Material	Lg.	Style	Material	Max. Grease Outlet Pressure, psi	Thread Type	Pipe Size	Gender		Each
For Pin-Style Grease Fittings
Nozzles
12"	Synthetic Rubber	1 1/2"	Straight	Steel	4,800	NPT	1/8	Male	0000000	000000
18"	Synthetic Rubber	1 1/2"	Straight	Steel	4,800	NPT	1/8	Male	0000000	00000

Rigid Grease Nozzles with Dispensing Tip

These nozzles come with a dispensing tip and have threads on one end for connecting to a grease gun.

	Nozzle		Dispensing Tip				Nozzle Connection
Style	Lg.	Material	Lg.	Style	Material	Max. Grease Outlet Pressure, psi	Thread Type	Pipe Size	Gender		Each
For Standard Grease Fittings
A	5 1/2"	Steel	1 9/16"	Straight	Steel	10,000	NPT	1/8	Male	0000000	000000
A	6 1/2"	Steel	1 7/16"	Straight	Steel	10,000	NPT	1/8	Male	0000000	00000
A	12"	Steel	1 7/16"	Straight	Steel	10,000	NPT	1/8	Male	0000000	00000
A	21"	Steel	1 9/16"	Straight	Steel	10,000	NPT	1/8	Male	0000000	000000

Flexible Grease Nozzles

Nozzle with Spring Guard

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

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
Nozzles with Spring Guard
36"	Polyester Elastomer Rubber	Steel	10,000	NPTF UNF	1/8 7/16"-20	Male Male	0000000	000000

Compact Pressure-Relief Valves

Due to their small size, these valves are often installed on tanks in low-clearance areas. They begin opening at the set pressure. Nylon valves fully open at about 10% over the set pressure and steel valves fully open at about 50% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. All have a vent outlet to exhaust discharge directly. Set pressure is not adjustable.

Steel Body—For Grease and Oil

For Use With: Grease, Oil
Temperature Range: Not Rated

Inlet							Each
Pipe Size	Location	Maximum Pressure, psi	Relief Port Location	Overall Ht.	Set Pressure, psi		1-9	10-Up
NPTF Male Inlet and Relief Vent
1/8	Bottom	5	Top	1/2"	1	000000	00000	00000
1/8	Bottom	15	Top	1/2"	7.5	000000	0000	0000
1/8	Bottom	25	Top	1/2"	15	000000	0000	0000
1/8	Bottom	80	Top	17/32"	45	000000	0000	0000
1/8	Bottom	140	Top	9/16"	80	0000000	0000	0000
1/8	Bottom	200	Top	1/2"	100	0000000	0000	0000
1/8	Bottom	650	Top	1/2"	400	0000000	0000	0000