Button-Head Zerks | McMaster-Carr

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	Button Head

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Standard	Flush

Button Head	Pin

THK

	Pipe Size Pipe Size

	Thread Type Thread Type

	System of Measurement System of Measurement

Metric

	Head Diameter Head Diameter

	Material Material

Steel

Stainless Steel

	Shape Shape

	Straight

	Gender Gender

Male

Female

	Maximum Pressure Maximum Pressure

	Hex Size Hex Size

	Thread Length Thread Length

	Overall Height Overall Height

	Thread Size Thread Size

	Thread Pitch Thread Pitch

1 mm

1.5 mm

	Shank Length Shank Length

	For Use With For Use With

Grease

	For Button-Head Diameter For Button-Head Diameter

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Check Valve Type Check Valve Type

Ball

Plunger

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

RoHS Compliant

	Shank Type Shank Type

Threaded

	Dispensing Tip Connection Pipe Size Dispensing Tip Connection Pipe Size

1/8

1/4

	Dispensing Tip Style Dispensing Tip Style

52 Products

About Grease Gun Components

About Grease Fitting Threads

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. 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.

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

For technical drawings and 3-D models, click on a part number.

Straight with Male Threads

										Each
Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Head Dia.	Max. Pressure, psi	Check Valve Type	Specifications Met		1-9	10-Up
1/8 NPTF Threads
303 Stainless Steel	45/64"	9/32"	3/16"	43/64"	5/8"	10,000	Ball	__	0000000	000000	000000
1/4 NPTF Threads
Zinc-Plated Steel	53/64"	27/64"	27/64"	5/8"	5/8"	6,000	Plunger	__	0000000	0000	0000
Zinc-Plated Steel	1 1/4"	1/2"	1/2"	7/8"	7/8"	15,000	Plunger	__	0000000	0000	0000
303 Stainless Steel	53/64"	13/32"	1/4"	43/64"	5/8"	10,000	Ball	__	0000000	00000	00000
3/8 NPTF Threads
Zinc-Plated Steel	61/64"	31/64"	31/64"	3/4"	5/8"	6,000	Plunger	__	0000000	0000	0000
Zinc-Plated Steel	1 5/16"	9/16"	9/16"	7/8"	7/8"	15,000	Plunger	__	0000000	0000	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"	15,000	Plunger	__	0000000	0000	0000
Zinc-Plated Steel	1 1/16"	35/64"	35/64"	7/8"	5/8"	6,000	Plunger	__	0000000	0000	0000
1/8 BSPP Threads
Zinc-Plated Steel	14mm	6mm	6mm	11mm	10mm	1,450	Ball	DIN 3404	0000000	0000	0000
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
1/4 BSPP Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
3/8 BSPP Threads
Zinc-Plated Steel	18mm	7mm	7mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
M6 × 1 mm Metric Threads
Zinc-Plated Steel	14mm	6mm	6mm	11mm	10mm	1,450	Ball	DIN 3404	0000000	0000	0000
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
M8 × 1 mm Metric Threads
Zinc-Plated Steel	14mm	6mm	6mm	11mm	10mm	1,450	Ball	DIN 3404	0000000	0000	0000
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
M10 × 1 mm Metric Threads
Zinc-Plated Steel	14mm	6mm	6mm	11mm	10mm	1,450	Ball	DIN 3404	0000000	0000	0000
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
303 Stainless Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	00000	00000
M14 × 1.5 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
M16 × 1.5 mm Metric Threads
Zinc-Plated Steel	18mm	7mm	7mm	17mm	16mm	10,000	Ball	DIN 3404	0000000	0000	0000
1/8 PTF-SAE Threads
Zinc-Plated Steel	3/4"	11/32"	11/32"	5/8"	5/8"	6,000	Plunger	__	0000000	0000	0000

Straight with Female Threads

									Each
Material	Overall Ht.	Shank Lg.	Thread 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

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	Thread Size	Thread Pitch	Gender		Each
For 5/8" Button-Head Style Grease Fittings
G	15/16"	90° Angle	Aluminum	10,000	NPT	1/8	__	__	Female	0000000	000000
G	1 1/8"	90° Angle	Steel	10,000	NS-2	__	7/16"-27	__	Female	0000000	00000
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
G	1 1/4"	90° Angle	Steel	15,000	PTF-SAE	1/4	__	__	Female	0000000	00000
G	1 3/8"	90° Angle	Steel	15,000	NS-2	__	7/16"-27	__	Female	0000000	00000
For 10 mm Button-Head Style Grease Fittings
H	1 1/8"	90° Angle	Steel	1,450	Metric	__	M10	1 mm	Female	0000000	00000
For 16 mm Button-Head Style Grease Fittings
H	1 1/8"	90° Angle	Steel	1,450	Metric	__	M10	1 mm	Female	0000000	00000
J	1 1/8"	Straight	Steel	1,450	Metric	__	M10	1 mm	Female	0000000	00000

Repair Kit for 1091K42	0000000	Each	000000
Repair Kit for 1091K44	0000000	Each	00000

Grease-Dispensing Tip Adapters

Quickly switch between grease fitting styles. Adapters have a quick-disconnect fitting that snaps into your dispensing tip for standard grease fittings.

For technical drawings and 3-D models, click on a part number.

	Dispensing Tip Adapter
Style	Lg.	Style	Material	For Button-Head Dia.	Max. Grease Outlet Pressure, psi		Each
For Button-Head Style Grease Fittings
A	3 5/8"	90° Angle	Steel	7/8"	4,000	0000000	000000
A	105mm	90° Angle	Aluminum	16mm	10,000	0000000	00000
A	107mm	90° Angle	Steel	10mm	10,000	0000000	00000
A	114mm	90° Angle	Aluminum	22mm	10,000	0000000	00000

Lever-Grip Grease Guns

With Rigid Nozzle

With Flexible Nozzle

Dispensing more grease per pump than pistol-grip guns, lever-grip guns are better for applications that require high grease output.

								Nozzle Connection
Cap., fl. oz.	For Max. Cartridge Size, oz.	Strokes per oz.	For NLGI Viscosity Grade	Max. Grease Outlet Pressure, psi	Nozzle Lg.	Nozzle Material	Dispensing Tip Material	Thread Type	Pipe Size	Gender	Loading Method		Each
For 5/8" Dia. Button-Head Style Grease Fittings
With Rigid Nozzle
17 1/2	14	17	000, 00, 0, 1, 2, 3	11,600	6 11/16"	Steel	Steel	NPT	1/8	Male	Bulk Filler Pump, Cartridge	0000000	000000
With Flexible Nozzle
17 1/2	14	17	000, 00, 0, 1, 2, 3	11,600	12"	Polyurethane Rubber	Steel	NPT	1/8	Male	Bulk Filler Pump, Cartridge	0000000	00000

Extreme-Pressure Lever-Grip Grease Guns

Dispense grease with the highest-pressure-rated gun we offer. To use, screw the T-handle into the barrel and prime the gun. The gun delivers grease for at least 20 strokes before it must be primed again.

				Nozzle				Nozzle Connection
Cap., fl. oz.	Strokes per oz.	For NLGI Viscosity Grade	Max. Grease Outlet Pressure, psi	Lg.	Type	Material	Reinforcement Material	Thread Type	Pipe Size	Gender	Loading Method	Includes		Each
For 7/8" Dia. Button-Head Style Grease Fittings
12	24	1, 2	15,000	18"	Flexible	Nylon Plastic	Kevlar	NPT	1/4	Male	Bulk Filler Pump, Hand Pack, Suction	Pressure Gauge, Relief Valve, Carrying Strap, Alemite Filler Nipple	000000	000000000

Pistol-Grip Grease Guns

With Rigid Nozzle

With Flexible Nozzle

Because of their one-hand operation, pistol-grip grease guns are easier to use for adding grease to hard-to-reach places than lever-grip guns.

Filler nipple (sold separately) is required to load guns using a bulk filler pump.

				Nozzle			Nozzle Connection
Cap., fl. oz.	Strokes per oz.	For NLGI Viscosity Grade	Max. Grease Outlet Pressure, psi	Lg.	Material	Dispensing Tip Material	Thread Type	Pipe Size	Gender	Loading Method		Each
For 5/8" Dia. Button-Head Style Grease Fittings
With Rigid Nozzle
14	40	0, 1, 2	5,400	6"	Steel	Steel	NPT	1/8	Male	Bulk Filler Pump, Cartridge, Hand Pack, Suction	0000000	000000
With Flexible Nozzle
14	40	0, 1, 2	5,400	12"	Nylon Plastic	Steel	NPT	1/8	Male	Bulk Filler Pump, Cartridge, Hand Pack, Suction	0000000	00000

Lincoln Filler Nipple	0000000	Each	000000
Alemite Filler Nipple	0000000	Each	0000