M12 Grease Fittings | McMaster-Carr

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Maximum Pressure

10,000 psi or greater

Specifications Met

DIN 3404

DIN 3405

DIN 71412

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17 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.

Zinc-plated steel fittings have mild corrosion resistance. 303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical 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.

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

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
M12 × 1 mm Metric Threads
Zinc-Plated Steel	18mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	10	0000000	000000	000000
M12 × 1.25 mm Metric Threads
Zinc-Plated Steel	17.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	10	00000000	00000	00000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	18mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
303 Stainless Steel	17.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	1	0000000	0000	0000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	17.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	0000	0000

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
M12 × 1 mm Metric Threads
Zinc-Plated Steel	22mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	000000	00000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	22mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	00000	00000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	22mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	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
M12 × 1 mm Metric Threads
Zinc-Plated Steel	22.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	000000	000000
M12 × 1.5 mm Metric Threads
Zinc-Plated Steel	23mm	6.5mm	6.5mm	14mm	10,000	Ball	DIN 71412	5	0000000	00000	0000
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	22.5mm	6.5mm	6.5mm	14mm	1,450	Ball	DIN 71412	5	00000000	00000	00000

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.

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

Straight with Male Threads

										Each
Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Head Dia.	Max. Pressure, psi	Check Valve Type	Specifications Met		1-9	10-Up
M12 × 1 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	1,450	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
M12 × 1.75 mm Metric Threads
Zinc-Plated Steel	17mm	6mm	6mm	17mm	16mm	1,450	Ball	DIN 3404	0000000	0000	0000

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 Style C with a hex wrench.

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

											Pkg.
Style	Material	Overall Ht.	Thread Lg.	Shank Lg.	Hex Size	Max. Pressure, psi	Check Valve Type	Specifications Met	Pkg. Qty.		1-9	10-Up
Straight with Male Threads
M12 × 1.5 mm Metric Threads
C	Zinc-Plated Steel	14mm	9.5mm	9.5mm	14mm	1,450	Ball	DIN 3405	5	00000000	000000	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.

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

Straight

Adapter

Connection
Male	Female	Material		Each
Adapters
Metric M12 × 1 mm	NPT 1/8	Steel	00000000	000000