Overview
Angled grease nipples sit at 45° or 90° to the thread axis, letting a grease gun coupler reach points a straight nipple cannot serve – behind guards, beside housings, near rotating assemblies. This family covers both angles across eleven thread options from M5 x 0.8 to 1/4″ BSP.
Head form follows DIN 71412; related dimensional standard: SAE J534. Overall length runs 12-25 mm depending on thread size, ball valve diameter is 2.5-6.0 mm, and minimum engagement is 8 full threads. Unsure which fitting style your machine uses? Start with our grease fitting types guide.
Specifications
| Parameter | Specification |
|---|---|
| Body angles | 45° and 90°; custom angles – confirm at order |
| Overall length | 12-25 mm, varies by thread size |
| Ball valve diameter | 2.5-6.0 mm |
| Minimum thread engagement | 8 full threads |
| Hex size | 7 / 8 / 10 mm |
| Materials | Carbon steel EN-1A; stainless steel 316; brass CW614N |
| Max working pressure | Carbon steel 8,000 PSI; stainless 316 7,500 PSI; brass 3,000 PSI |
| Temperature range | -40°C to +121°C; high-temperature variant to +200°C |
| Coatings (carbon steel) | Yellow zinc or clear zinc |
Thread Options
The body angle never changes the thread: match the thread to the port first, then pick the angle for access.
| Metric thread | Pitch | Typical use |
|---|---|---|
| M5 x 0.8 | 0.8 mm | Compact points, automotive accessories |
| M6 x 1.0 | 1.0 mm | Standard automotive, light industrial |
| M8 x 1.0 | 1.0 mm | Heavy-duty, construction equipment |
| M10 x 1.0 | 1.0 mm | High-pressure industrial systems |
| Imperial thread | TPI / type | Typical use |
|---|---|---|
| 1/4″-28 UNF | 28, unified fine | North American automotive |
| #10-32 UNF | 32, unified fine | Light-duty precision points |
| 1/8″-27 NPT | 27, tapered pipe | Pipe thread ports |
| 1/4″-18 NPT | 18, tapered pipe | Heavy-duty pipe systems |
| British / pipe thread | Type | Typical use |
|---|---|---|
| 1/4″ BSP | Parallel | British standard pipe ports |
| 1/8″ BSP | Parallel | Compact applications |
| G1/4 | Parallel | International metric pipe ports |
For the smallest common metric option in detail, see the M6 grease nipple (DIN 71412) page.
45° or 90°: How to Choose
Choose the angle from the coupler’s approach path, not from the nipple alone. A 45° body suits points the gun can reach from the side; a 90° body serves points recessed behind a guard, flush against a wall, or beside a rotating shaft.
Two cautions. First, the coupler body is far larger than the nipple head – check clearance for the coupled gun and hose, not just the fitting. Second, a 90° head stands taller and risks impact from debris or tools; orient the outlet toward the protected side.
For the full 90° form – per-thread dimensions, orientation, impact protection – see the 90 degree grease nipple page. Where impact risk rules out any angled head, consider DIN 3404 button head fittings.
Pressure Ratings by Material
| Material | Max working pressure | Selection note |
|---|---|---|
| Carbon steel EN-1A | 8,000 PSI | General industrial use |
| Stainless steel 316 | 7,500 PSI | Corrosion exposure, marine and outdoor |
| Brass CW614N | 3,000 PSI | Lower-pressure points, chemical compatibility |
These are declared maximum working pressures; the real limit of a lubrication run is set by the grease gun, hose, and coupler. Brass is the honest choice only where system pressure stays well under 3,000 PSI.
Installation
- Confirm the port thread from the tables above – thread selection comes before angle selection.
- Clean the threaded hole and remove burrs or old sealant.
- Start the nipple by hand to avoid cross-threading; minimum engagement is 8 full threads.
- Orient the outlet toward the coupler approach side before final tightening.
- Tighten with the matching hex (7, 8, or 10 mm) to the torque below.
| Thread | Tightening torque (Nm) |
|---|---|
| M5 | 4-6 |
| M6 | 8-12 |
| M8 | 15-20 |
| M10 | 25-35 |
| 1/4″ UNF | 10-15 |
| 1/8″ NPT | 8-12 |
Request a quote for your thread, angle, and material combination.
Ordering Code
The code format is GN-[Angle]-[Thread]-[Material]-[Coating]: angle 45 or 90; material CS (carbon steel), SS (stainless 316), or BR (brass); coating ZP (yellow zinc), CZ (clear zinc), or PA (passivated, stainless only). Example: GN-90-M6-CS-ZP reads as a 90° angled grease nipple, M6 x 1.0 thread, carbon steel, yellow zinc plated.
FAQ
What is an angled grease nipple?
A grease fitting whose outlet head sits at 45° or 90° to the thread axis, so a grease gun coupler can reach points a straight nipple cannot serve. The head form follows DIN 71412.
Should I choose a 45° or 90° grease nipple?
Choose 45° when the gun can approach from the side; choose 90° when the point is recessed, flush against an obstruction, or beside rotating parts.
Will an angled nipple reduce grease flow or pressure rating?
The internal ball-check valve and flow path match straight equivalents of the same thread size; the angle changes only external geometry. Declared maximums: 8,000 PSI (carbon steel), 7,500 PSI (316 stainless), 3,000 PSI (brass).
Can the coupler hit the machine even if the nipple fits?
Yes. The coupler body and hose are far larger than the nipple head, so check the full swing of the coupled gun before choosing an angle.
Does a 90° nipple stick out too far?
It stands taller than a 45° or straight fitting, so exposed positions risk impact. Orient the outlet toward the protected side, or use a lower-profile style.
Can an angle make up for choosing the wrong thread?
No. A 45° or 90° body only changes the approach direction; it cannot adapt M6 to M8 or UNF to NPT. Identify the port thread first, then select the angle.
Why is brass limited to 3,000 PSI?
Brass CW614N is the softest material in this family, so its declared working ceiling sits below steel. Use brass for chemical compatibility on lower-pressure points; use steel where pressure is higher.
How do I read an order code like GN-90-M6-CS-ZP?
GN marks the grease nipple family; 90 is the body angle; M6 is the thread; CS is carbon steel; ZP is yellow zinc plating. The code reads: 90° angled nipple, M6 x 1.0, carbon steel, yellow zinc.
What temperatures can angled grease nipples handle?
The standard range is -40°C to +121°C across all three materials. A high-temperature variant extends the upper limit to +200°C – confirm availability at order.
Can I get a custom angle or a special thread?
Custom angles beyond 45° and 90° – confirm at order with your dimensional requirements. For any thread, material, or coating mix, contact IsoHiTech for a quote: IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006; inquiry@isohitech.com.
