Zerk Tube Fittings | McMaster-Carr

	Shape Shape


30° Elbow	45° Elbow

60° Elbow	65° Elbow

67° Elbow	90° Elbow

Straight	Wye

	Thread Type Thread Type

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Pipe Size Pipe Size

	Material Material

	Grease Fitting Style Grease Fitting Style


Standard	Flush

Button Head	Pin

	Gender Gender

Male

Female

	Overall Height Overall Height

	For Use With For Use With

	Hex Size Hex Size

	Thread Pitch Thread Pitch

	Thread Length Thread Length

	Shank Length Shank Length

	Shank Type Shank Type

Threaded

Serrated

Smooth

	Check Valve Type Check Valve Type

	Maximum Pressure Maximum Pressure

	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

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

RoHS Compliant with
Exemptions

RoHS Compliant

	For Hole Diameter For Hole Diameter

	Fitting Material Fitting Material

Steel

Stainless Steel

Brass

	Connection Style Connection Style

356 Products

About Grease Fitting Threads

Grease Fittings

Inject lubricant into motors, bearings, engine blocks, and all kinds of machinery.

Leakproof Grease Fittings

Keep thin grease from leaking out—the check valve on these fittings has a Buna-N seat that creates a tighter seal than check valves on other grease fittings.

Flow-Stop Grease Fittings

Prevent damage to bearing seals caused by over-lubrication—these fittings automatically stop grease flow when pressure is within the shut-off range.

Grease Fitting Assortments

Assortments contain straight, 45° elbow, and 90° elbow fittings.

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.

Flush-Style Grease Fittings

Use these fittings in tight spaces where protruding fittings won't work.

Pin-Style Grease Fittings

The pins on these fittings lock with dispensing tips for pin-style fittings to create a tight seal.

Grease Fittings for Unthreaded Holes

Drive these fittings into unthreaded holes. They're also known as hydraulic grease fittings.

Self-Tapping Grease Fittings for Unthreaded Holes

Ensure a secure fit in unthreaded holes—these fittings cut threads as they’re installed. They're also known as hydraulic grease fittings.

Flush-Style Grease Fittings for Unthreaded Holes

Use these fittings in tight spaces where protruding fittings won't work. Drive them into unthreaded holes.

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 these fittings in tight spaces where protruding fittings won't work.