Where a 67.5 Degree Fitting Fits
This angled hydraulic-type grease nipple is built for the in-between case. The 67.5 degree bend sits steeper than a 45 degree fitting but projects less than a 90 degree head, so it reaches grease points tucked inside engine bays, behind guards, and within machine frames where a coupler cannot approach straight-on. The angle is measured from the thread axis. The conical hydraulic head measures 6.5 mm and mates standard four-jaw couplers. An internal ball check holds grease in the passage and keeps dirt out, opening at roughly 0.3-0.5 bar. Each fitting is manufactured to the applicable DIN 71412 dimensional requirements.
Technical Specifications
Review the core dimensions below before selecting a thread size for your lubrication point.
| Angle | 67.5 degree from the thread axis |
| Head | conical hydraulic type, 6.5 mm (0 to minus 0.2 mm) |
| Ball check opening | approx. 0.3-0.5 bar |
| Working pressure | 6,000 psi continuous, 8,000 psi maximum, 10,000 psi short-term peak |
| Threads | M6 x 1, M8 x 1, M10 x 1 metric; 1/4-28 UNF; 1/8-27 NPT |
| Hex base | 7 or 9 mm (M6), 11 mm (M8), 14 mm (M10), 9.5 mm (1/4-28), 11 mm (1/8-27) |
| Overall length | 16-35 mm by size |
| Materials | carbon steel zinc-plated, stainless steel 316, brass, nickel-copper alloy on special order |
| Temperature | -20°C to 80°C (zinc steel), -40°C to 120°C (316), -30°C to 100°C (brass) |
Choosing Between 45, 67.5 and 90 Degrees
A 45 degree fitting can be too shallow when the approach is steep. A 90 degree head projects far and can catch passing objects. The 67.5 degree option splits the difference. Browse the full angled grease nipples family, compare against the 90 degree grease nipple, or review the DIN 71412 grease nipples range. Always check the swept envelope, meaning the head plus coupler plus hose bend allowance, in the real tightened position.
Orientation After Tightening
A threaded fitting does not finish at a predictable clock position. Tighten it and see where the head actually points. If the aim is off, correct it with a sealing washer or a thin locknut rather than over-tightening the fitting. Keep a minimum of 4-6 full threads engaged so the joint stays sound under load.
Installation and Coupler Seating
Torque by size: M6 at 3-5 Nm, M8 at 5-8 Nm, M10 at 8-12 Nm, 1/4-28 UNF at 5-7 Nm, and 1/8-27 NPT at 7-10 Nm. On tapered threads, judge seating plus the torque window. Apply sealant only on the thread, never near the ball check. For related sizes see the M10 grease nipples and the M12 x 1.25 metric zerk pages. The coupler must sit square on the cone, not at a rake.
What Is Supplied
Single fittings are supplied by thread and material. State the size and material when ordering, or request a quote for your combination.
Frequently Asked Questions
When is 67.5 degree better than 45 or 90 degree?
It suits points where a 45 degree fitting is too shallow and a 90 degree head would stand too proud. It splits the approach angle in tight compartments.
How is the angle of a grease fitting measured?
The angle is measured from the thread axis. A 67.5 degree fitting bends that far from the straight thread centerline.
Will the head point where I need after tightening?
Not always, because threads do not finish at a predictable clock position. Correct the aim with a sealing washer or thin locknut.
Which thread sizes does this fitting come in?
Metric M6 x 1, M8 x 1, and M10 x 1, plus 1/4-28 UNF and 1/8-27 NPT. Hex base varies by size.
Will a standard four-jaw coupler seat on the head?
Yes, the 6.5 mm conical hydraulic head mates standard four-jaw couplers. The coupler must sit square on the cone.
How much clearance should I leave around the head?
Allow room for the head, the coupler, and the hose bend allowance. Check the swept envelope in the tightened position.
Which material should I choose for my environment?
Zinc-plated carbon steel covers general use, stainless steel 316 suits wet or corrosive areas, and brass handles moderate conditions.
What does the ball check valve do?
It holds grease in the passage and keeps dirt out. It opens at roughly 0.3-0.5 bar during greasing.
Should I use thread sealant during installation?
Only on the thread, and only where the thread type calls for it. Never place sealant near the ball check.
Can IsoHiTech confirm the size and angle before ordering?
Yes. IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, supplies the full angle and thread range. Send your thread size and approach angle to inquiry@isohitech.com or via the quote page for confirmation.
