Hydraulic Straight Nipple
Double-threaded through-bored straight hydraulic nipple.
This is a dimension schematic, not a manufacturing drawing. Dimensions match the catalog data; request a quote with the part code to confirm before production.
Code & Size Table
Code, dimensions and tolerance for all 9 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| RAKB-NPL-04 | 9.2 | 21 | M6 · SW8 · ⌀3.5 | 6g | ⌀3.5 through bore |
| RAKB-NPL-12 | 9.2 | 21 | M5 · SW8 · ⌀2.5 | 6g | mini nipple; ⌀2.5 through bore |
| RAKB-NPL-05 | 11.5 | 26 | M8 · SW10 · ⌀4.5 | 6g | ⌀4.5 through bore |
| RAKB-NPL-09 | 11.5 | 26 | M6 · SW10 · ⌀3 | 6g | ⌀3 through bore |
| RAKB-NPL-08 | 13.9 | 30 | M8x1 · SW12 · ⌀4.5 | 6g | fine thread; ⌀4.5 through bore |
| RAKB-NPL-06 | 15 | 31 | M10x1 · SW13 · ⌀6 | 6g | fine thread; ⌀6 through bore |
| RAKB-NPL-07 | 16.2 | 36 | M12x1.5 · SW14 · ⌀7 | 6g | ⌀7 through bore |
| RAKB-NPL-10 | 16.2 | 33 | M10x1.25 · SW14 · ⌀5.5 | 6g | ⌀5.5 through bore |
| RAKB-NPL-11 | 19.6 | 41 | M12x1.5 · SW17 · ⌀8 | 6g | wide bore ⌀8; high flow |
Prices are for approved members.
Material & Tolerance
The standard material is listed below; also available in steel, stainless, brass and aluminium. Dimensions in mm; tolerances machined to ISO. Deviations (mm) are given for the nominal diameter according to the ISO 286-2 tables; thread tolerances (6g/6H) are to ISO 965. For custom sizes/tolerances, contact us with the part code.
Manufacturing Scope
Hydraulic Straight Nipple is a Fittings family precision-turned on a Goodway SW-20, covering 9 variants — diameters ⌀9.2–19.6 mm, lengths 21–41 mm, standard material Steel (also stainless steel, brass or aluminium). Every variant's part code, dimension and tolerance is listed below; request a quote with the code you need.
The family is machined from ⌀20 mm bar stock; its longest variant is RAKB-NPL-11 at 41 mm. Besides turning, the family requires thread turning (7 sizes from M5 to M12x1.5), hex flat milling (AF 8–17) and axial drilling (⌀2.5–8 mm). All of it is completed in a single setup, without the part leaving the machine.
The variant with the highest length-to-diameter ratio is RAKB-NPL-04: 21 mm long at ⌀9.2 mm, L/D 2.3. A short, rigid body: what governs the result here is not deflection but diameter tolerance and surface finish.
Variants are machined to 6g tolerance; the smallest is RAKB-NPL-04 (⌀9.2 mm) and the largest RAKB-NPL-11 (⌀19.6 mm). The family includes threaded, hex-drive, bored, multi-step variants. Custom sizes, tolerances or materials are produced to the part code on request.
Need a size that isn't listed? We machine to your drawing — CNC contract machining. How these parts are made: What is a Swiss-type lathe?
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