Flush Zerk Fittings | McMaster-Carr

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Standard	Flush

Button Head	Pin

THK

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

10-32

1/4"-28

M10

	Thread Type Thread Type

	Pipe Size Pipe Size

	Component Component

Dispensing Tip

Dispensing Tip Adapter

Dispensing Tip Extension

	For Use With For Use With

Grease

	Shape Shape

	Straight

	Overall Height Overall Height

	Shank Length Shank Length

	Check Valve Type Check Valve Type

Ball

	Thread Length Thread Length

	Material Material

Steel

	Gender Gender

Male

	For Lubrication Point Type For Lubrication Point Type

With Grease Fitting

Without Grease Fitting

	Shank Type Shank Type

Threaded

Serrated

Smooth

	For Hole Diameter For Hole Diameter

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

RoHS Compliant with
Exemptions

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

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

REACH Compliant

	Hex Size Hex Size

	Maximum Pressure Maximum Pressure

10,000 psi

Not Rated

	Thread Pitch Thread Pitch

1 mm

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39 Products

About Grease Gun Components

About Grease Fitting Threads

Use these fittings in tight spaces where protruding fittings won't work. They’re zinc-plated steel for mild corrosion resistance. 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.

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

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.

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

												Pkg.
Style	Material	Overall Ht.	Shank Lg.	Thread Lg.	Slot Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
Straight with Male Threads
1/8 NPTF Threads
A	Zinc-Plated Steel	23/64"	23/64"	19/64"	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"	39/64"	31/64"	__	3/4"	10,000	Ball	__	1	00000000	00000	00000
3/4 NPTF Threads
C	Zinc-Plated Steel	7/8"	39/64"	29/64"	__	1 1/8"	10,000	Ball	__	1	00000000	00000	00000
1/2 NPT Threads
C	Zinc-Plated Steel	55/64"	39/64"	7/16"	__	7/8"	10,000	Ball	__	1	00000000	00000	00000
10-32 UNF Threads
A	Zinc-Plated Steel	3/8"	15/64"	3/16"	1/4"	__	10,000	Ball	__	5	00000000	0000	0000
1/4"-28 UNF Threads
C	Zinc-Plated Steel	13/32"	19/64"	3/16"	__	5/16"	10,000	Ball	__	5	00000000	0000	0000
M6 × 1 mm Metric Threads
C	Zinc-Plated Steel	9mm	6mm	6mm	__	7mm	10,000	Ball	DIN 3405	5	0000000	0000	0000
M8 × 1 mm Metric Threads
C	Zinc-Plated Steel	9.5mm	6.5mm	6.5mm	__	9mm	10,000	Ball	DIN 3405	5	0000000	0000	0000
M10 × 1 mm Metric Threads
C	Zinc-Plated Steel	9.5mm	6.5mm	6.5mm	__	11mm	10,000	Ball	DIN 3405	5	0000000	0000	0000

Flush-Style Grease Fittings for Unthreaded Holes

Use these fittings in tight spaces where protruding fittings won’t work. Drive them into unthreaded holes with a hammer and grease fitting installation tool (sold separately). They’re zinc-plated steel for mild corrosion resistance. 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.

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

Straight with Serrated Shank

									Pkg.
For Hole Dia.	Material	Overall Ht.	Shank Lg.	Head Dia.	Max. Pressure	Check Valve Type	Pkg. Qty.		1-9	10-Up
3/16"	Zinc-Plated Steel	3/8"	5/16"	1/4"	Not Rated	Ball	5	0000000	000000	00000

Straight with Smooth Shank

										Pkg.
For Hole Dia.	Material	Overall Ht.	Shank Lg.	Head Dia.	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
1/4"	Zinc-Plated Steel	9/32"	15/64"	5/16"	Not Rated	Ball	__	5	0000000	000000	000000
5/16"	Zinc-Plated Steel	11/32"	9/32"	3/8"	Not Rated	Ball	__	5	0000000	0000	0000
5mm	Zinc-Plated Steel	7.5mm	5.5mm	8mm	Not Rated	Ball	__	5	0000000	00000	0000
6mm	Zinc-Plated Steel	7.5mm	5.5mm	8mm	10,000	Ball	DIN 3405	5	0000000	00000	00000
8mm	Zinc-Plated Steel	9.5mm	6.5mm	10mm	10,000	Ball	DIN 3405	5	0000000	00000	00000
10mm	Zinc-Plated Steel	9.5mm	6.5mm	12mm	10,000	Ball	DIN 3405	3	0000000	0000	0000

Self-Tapping Flush-Style Grease Fittings for Unthreaded Holes

Ensure a secure fit in unthreaded holes—these fittings cut threads as they’re installed. Use them in tight spaces where protruding fittings won't work. Install with a hex wrench. Fittings can be driven in, but then are not pressure rated. They’re zinc-plated steel for mild corrosion resistance. 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.

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

											Pkg.
For Hole Dia.	Material	Overall Ht.	Shank Lg.	Thread Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
Straight with Male Threads
M6 × 1 mm Metric Threads
5.6-5.7 mm	Zinc-Plated Steel	8.5 mm	5.5 mm	5.5 mm	7 mm	10,000	Ball	DIN 3405	5	0000000	000000	000000
M8 × 1 mm Metric Threads
7.6-7.7 mm	Zinc-Plated Steel	8.5 mm	5.5 mm	5.5 mm	9 mm	10,000	Ball	DIN 3405	3	0000000	0000	0000
M10 × 1 mm Metric Threads
9.6-9.7 mm	Zinc-Plated Steel	8.5 mm	5.5 mm	5.5 mm	11 mm	10,000	Ball	DIN 3405	1	0000000	0000	0000

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		Each
For Flush-Style Grease Fittings
M	13/16"	Straight	Steel	3,000	NPT	1/8	Male	00000000	00000
N	1 1/4"	Straight	Steel	10,000	NPTF	1/8	Female	000000	0000
P	2"	Straight	Steel	10,000	NPTF	1/8	Female	0000000	00000

Grease-Dispensing Tip Adapters


B	C	D	E
B	F

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

	Dispensing Tip Adapter
Style	Lg.	Style	Material	Max. Grease Outlet Pressure, psi		Each
For Flush-Style Grease Fittings
B	2 1/4"	90° Angle	Steel	4,000	0000000	000000
C	4 1/2"	90° Angle	Steel	4,000	0000000	00000
D	4 3/4"	Straight	Steel	5,800	0000000	00000
E	3 5/8"	Straight	Steel	Not Rated	0000000	00000
F	95mm	Straight	Steel	10,000	0000000	00000

Grease Gun Attachment Sets

7-Piece Set

12-Piece Set

Sets include dispensing tips for grease fittings and bare lubrication points. Dispensing-tip extensions and adapters have a quick-disconnect fitting that snaps into your dispensing tip for standard grease fittings.

Number of Pieces	Includes		Each
7	12" Long Flexible Dispensing Tip Extension for Standard Grease Fittings 5 5/8" Long Straight Rigid Dispensing Tip Adapter for Flush-Style Grease Fittings Rubber-Tipped Needle Nozzle for U-Joints and Spindles 4 1/2" Long 90° Angle Rigid Dispensing Tip Extension for Standard Grease Fittings 5 3/8" Long 90° Angle Rigid Dispensing Tip Extension for Standard Grease Fittings 7 1/2" Long 90° Angle Rigid Dispensing Tip Extension with 360° Rotation for Standard Grease Fittings 6" Long Straight Rigid Dispensing Tip for Standard Grease Fittings	0000000	0000000
12	12" Long 45° Angle Dispensing Tip Adapter for Flush-Style Grease Fittings 12" Long 90° Angle Dispensing Tip Adapter For Flush-Style Grease Fittings 12" Long J-Bend Dispensing Tip Adapter for Flush-Style Grease Fittings 12" Long Straight Dispensing Tip Adapter for Flush-Style Grease Fittings 2 3/4" Long 90° Angle Dispensing Tip Adapter for Standard Grease Fittings 2 3/4" Long 90° Angle Dispensing Tip Adapter for Flush-Style Grease Fittings 21" Long Flexible Dispensing Tip Extension 4 1/4" Long 90° Angle Dispensing Tip Adapter for Flush-Style Grease Fittings 4 5/16" Long Straight Dispensing Tip Adapter for Flush-Style Grease Fittings 5 1/8" Long Straight Dispensing Tip Adapter with 12-ga. Needle 8" Long Rigid Dispensing Tip Extension 1 1/2" Long Straight Dispensing Tip for Standard Grease Fittings	0000000	000000

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 Flush-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

Push-Action Grease Guns

Deliver small amounts of grease with only a light push against the lubrication point.

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

			Nozzle
Cap., fl. oz.	Strokes per oz.	Max. Grease Outlet Pressure, psi	Lg.	Type	Material	Overall Lg.	Loading Method		Each
For Flush-Style Grease Fittings
3.7	50	2,600	1 5/16"	Rigid	Steel	9 1/4"	Hand Pack	0000000	000000

Compact Pistol-Grip Grease Guns

Dispense small amounts of grease with one of these compact guns. Styles A and D have a palm and finger-grip design—push the plunger with your thumb to dispense grease.

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

For Flush-Style Grease Fittings

					Nozzle			Nozzle Connection
Style	Cap., fl. oz.	Strokes per oz.	For NLGI Viscosity Grade	Max. Grease Outlet Pressure, psi	Lg.	Type	Material	Thread Type	Pipe Size	Gender	Loading Method		Each
D	3	150	1, 2, 3	3,000	13/16"	Rigid	Steel	NPT	1/8	Male	Hand Pack	00000000	000000

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 Flush-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