Bulkhead Nipple
Bulkhead pass-through nipple with long thread, mid hex seat and full bore.
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-BLK-11 | 9.2 | 22 | M5 · SW8 · ⌀2.5 | 6g | micro bulkhead; ⌀2.5 through bore |
| RAKB-BLK-07 | 11.5 | 25 | M6 · SW10 · ⌀3 | 6g | mini bulkhead; ⌀3 through bore |
| RAKB-BLK-04 | 13.9 | 32 | M8 · SW12 · ⌀4.5 | 6g | long panel thread; ⌀4.5 through bore |
| RAKB-BLK-08 | 15 | 37 | M8x1 · SW13 · ⌀5 | 6g | long thread for thick panel; fine pitch |
| RAKB-BLK-05 | 16.2 | 37 | M10x1 · SW14 · ⌀6 | 6g | long panel thread; ⌀6 through bore |
| RAKB-BLK-09 | 16.2 | 42 | M10x1.25 · SW14 · ⌀6 | 6g | long thread for thick panel |
| RAKB-BLK-12 | 16.2 | 29 | M10x1 · SW14 · taper · ⌀5.5 | 6g | tapered seat one end; panel feed-through |
| RAKB-BLK-06 | 19.6 | 42 | M12x1.5 · SW17 · ⌀7.5 | 6g | long panel thread; ⌀7.5 through bore |
| RAKB-BLK-10 | 19.6 | 49 | M12x1.5 · SW17 · ⌀8 | 6g | thick panel; high-flow ⌀8 bore |
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
Bulkhead Nipple is a Fittings family precision-turned on a Goodway SW-20, covering 9 variants — diameters ⌀9.2–19.6 mm, lengths 22–49 mm, standard material Stainless Steel (also 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-BLK-10 at 49 mm. Besides turning, the family requires thread turning (7 sizes from M5 to M12x1.5), hex flat milling (AF 8–17), taper turning 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-BLK-09: 42 mm long at ⌀16.2 mm, L/D 2.6. 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-BLK-11 (⌀9.2 mm) and the largest RAKB-BLK-10 (⌀19.6 mm). The family includes threaded, hex-drive, tapered, 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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