Giant button head grease fitting overview
This giant button head grease fitting follows DIN 3404 Type M22 for high-pressure grease work. The flat-top button head measures 22 mm (7/8 in) across, far larger than the 6.5 mm conical head, so a large cavity charges faster at the same gun speed.
Came looking for high flow, giant heads, or 22 mm? You are in the right place; browse our lubrication fitting category for the full range of head styles and threads.
Where the giant button head fits
The giant button head is built for large-cavity grease charging: heavy machinery large-cavity bearings, construction and agricultural machinery chassis, and factory heavy-duty bearing housings are typical applications. Regular points on small bearings still take standard fittings chosen by thread.
Specifications
The table lists the specification as supplied.
| Item | Specification |
|---|---|
| Standard | DIN 3404 Type M22 |
| Head style | Flat-top button head |
| Head diameter | 22 mm (7/8 in) |
| High-pressure class | High-pressure grease service |
| Flow vs standard conical head | 2 – 5x vs the 6.5 mm conical head (DIN 71412) |
| Carbon steel tier pressure | 10,000 PSI max, 12L14 / 1215 |
| Alloy steel tier pressure | 15,000 PSI max, 4140 quenched and tempered, tensile 655 MPa or higher |
| Carbon steel surface | Zinc plated + passivated |
| Stainless option | 316 / 316L, passivated |
| Required coupler | Dedicated button-head coupler, 22 mm jaw opening |
Pressure and material tiers
Carbon steel 12L14 / 1215, zinc plated and passivated, is the dry general-use tier, limited to 10,000 PSI. Alloy steel 4140, quenched and tempered, tensile 655 MPa or higher, is the high-pressure tier rated to 15,000 PSI. Stainless 316 / 316L, passivated, suits wet or chloride-prone surroundings. A point that sees 15,000 PSI needs the alloy steel tier. If unsure which tier fits, ask for a tailored quote.
Coupler matching for the button head
The 22 mm button head works only with a dedicated button-head coupler, 22 mm jaw opening. A standard four-jaw hydraulic coupler for 6.5 mm conical heads does not seat on it. For conical-head points, see our four-jaw high-pressure grease coupler; the giant button head needs the button-head type.
Frequently Asked Questions
When do I need a giant button head instead of a standard 6.5 mm conical head?
Choose the giant button head when the point feeds a large cavity or a large grease volume, when you grease with gloves on, or when the point sits in a muddy, shock-prone area where a small conical tip is hard to seat. Regular points go by thread instead: inch threads to the imperial conical-head pages, metric equipment to our M10 metric grease fitting page.
What happens if I push a standard four-jaw coupler onto the 22 mm button head?
A standard four-jaw hydraulic coupler is sized for the 6.5 mm conical head, so it does not lock onto the 22 mm button. It sits loose, leaks grease around the head, can blow off under pressure, and can chew the flat top; the fix is a dedicated button-head coupler, 22 mm jaw opening.
What does 2 – 5x flow mean in practice?
At the same grease gun speed, the giant head pushes grease into a large cavity faster than a 6.5 mm conical head. Demo: if the 6.5 mm head delivers X grease per unit of time, the giant button head delivers 2X – 5X in the same time. X is a demo variable, not a spec value; real output depends on your gun, hose, and grease.
How do I choose among the three material tiers?
Match the tier to the environment and pressure, not to habit. Carbon steel 12L14 / 1215, zinc plated and passivated, covers dry general use. Alloy steel 4140 covers high-pressure points. Stainless 316 / 316L, passivated, suits wet or chloride-prone environments.
How do the 10,000 PSI and 15,000 PSI tiers map to materials?
The carbon steel tier tops out at 10,000 PSI. For 15,000 PSI work, specify the alloy steel tier: 4140 quenched and tempered, tensile 655 MPa or higher. A point near 15,000 PSI is past the carbon steel limit.
How do I check installation space for the 22 mm head?
The 22 mm button head takes more room than a conical head, and the coupler needs swing space around it. Before ordering, measure the clearance around the point for the full head diameter plus the coupler, and confirm both fit.
How do DIN 3404 and SAE J534 relate to each other?
DIN 3404 is the European button head standard, SAE J534 the North American high-pressure grease fitting spec. This fitting follows the DIN 3404 Type M22 form; confirm coupler compatibility before ordering for SAE J534 equipment.
Does the fitting have a check valve?
Yes. Like other grease fittings in this class, it uses a ball check valve: the coupler presses the ball open during charging, and a spring reseats it when the coupler comes off, keeping grease in and contaminants out.
Is the coupler matched to the head or to the thread?
They are separate choices. The coupler grips the head, here the 22 mm button, while the thread matches the equipment port. Pick the coupler for the head style and the fitting thread for the port; confirm the thread before ordering.
Who makes this giant button head fitting?
This DIN 3404 M22 giant button head grease fitting is supplied by IsoHiTech Lubrication Systems, a team founded in 2023, engineering since 2006. For tier selection, coupler matching, or a tailored quote, email inquiry@isohitech.com or request a quote through our contact page.
