Nuts & Thread Adapters Manufacturing — CNC Swiss-Turned Parts
126 types of nuts and thread adapters: dome, flanged, coupling, reducing nipples and bushings. CNC Swiss-turned in steel, stainless, brass at ⌀6–20 mm.
Part Families
Cap Nut (Dome)
Hex cap nut with domed closed end that seals the thread tip for protection and aesthetics.
⌀6.4–19.6 · L 7–24 mm
8 types
Standard Hex Nut
Classic standard-height hex nut for general fastening and assembly connections.
⌀6.4–19.6 · L 1.6–10 mm
9 types
High / Tall Nut
Increased-height hex nut providing more thread engagement for high tensile loads.
⌀6.4–19.6 · L 6–24 mm
8 types
Coupling / Extension Nut
Long hex coupling nut that axially joins two threaded rods with a through internal thread.
⌀6.4–19.6 · L 12–70 mm
9 types
Threaded Sleeve (Round Coupler)
Round-body threaded sleeve with internal thread that couples threaded rods on a smooth outer surface.
⌀6–18 · L 15–35 mm
9 types
Flanged Hex Nut
Hex nut with an integrated washer flange that spreads load and removes the need for a separate washer.
⌀7.6–19.6 · L 4.5–13.5 mm
8 types
Knurled Thumb Nut
Hand-tightened knurled round nut for quick tool-free assembly and removal.
⌀8–18 · L 10–20 mm
8 types
Reduction Nipple (Male-Male)
Male-male reduction nipple joining two different external thread sizes in a step.
⌀7–16 · L 17–35 mm
10 types
Female-Male Thread Adapter
Adapter with external thread on one end and internal threaded bore, converting between sizes.
⌀7–18 · L 18–38 mm
10 types
Hex Transition Nipple
Transition nipple with central hex wrench flats and external threads on both ends.
⌀8.1–19.6 · L 19–42 mm
10 types
Threaded Reduction Bush (Female-Female)
Bored reduction bush with internal threads of different sizes tapped from each end.
⌀9–20 · L 10–20 mm
7 types
Tapered Thread Transition Adapter
Transition adapter with a centering tapered body and an external thread at the tip.
⌀8–20 · L 19–40 mm
10 types
Hex-Body Thread Adapter
Single-ended adapter with an external thread and internal thread on a hex wrench-flat body.
⌀8.1–19.6 · L 13–29 mm
10 types
Knurled Transition Nipple
Transition nipple with a knurled grip body and external threads on both ends.
⌀8–20 · L 20–42 mm
10 types
Enter ⌀ and L to list matching variants with code and tolerance.
Search this category by sizeNuts and thread adapters are precision-turned fasteners that lock two components together or bridge different thread standards and diameters; they form the load-bearing joints in machinery, hydraulic-pneumatic systems, automotive and general assembly lines. This category spans 14 families and 126 types: dome (blind) nuts, standard hex spacer nuts, high nuts, coupling (extension) nuts, cylindrical threaded sleeves, flanged nuts, knurled thumb nuts, plus male-male reducing nipples, female-male thread adapters, hex transition nipples, female-female reducing bushings, tapered thread adapters, and hex-body and knurled transition nipples. We machine steel, stainless steel, brass and aluminium. Pilot diameters and thread profiles are held to ISO tolerance classes such as h6/H7; ±0.01 mm is targeted on critical diameters. Production runs on a Goodway SW-20 Swiss lathe across the ⌀6–20 mm range, completing threading, drilling and hex milling in a single setup with driven tools. Alongside the 126 standard types we manufacture custom sizes to your drawing; send a dimension or drawing and we reply with a quote.
Across 126 variants the operation mix is 60× thread turning, 62× hex flat milling, 86× axial bore, 23× taper turning, 23× knurling. Parts run 1.6–70 mm long; the longest, SOMA-KAP-10-L at 70 mm, still finishes in a single setup.
Tolerances span 2 classes (6H, 6g) and 126 variants carry a DIN or ISO reference. The highest length-to-diameter ratio in the category belongs to SOMA-KAP-06-L at L/D 4.3 — the slimmest proportion here, still within reach of a conventional lathe.
Every part is CNC-turned to your drawing — series, small batches and custom turned parts. Send your drawing (PDF/DWG/STEP) for a quote.
Frequently Asked Questions
Production runs on a Goodway SW-20 CNC Swiss lathe across the ⌀6–20 mm bar range. Because the guide bushing supports the bar close to the cutting point, hex bodies, thin-walled dome nuts and long coupling nuts are turned with low deflection in a single setup. Threading, drilling and hex milling are completed in the same clamping using synchronized driven tools.
We machine steel, stainless steel (304/316 grade), brass and aluminium. Steel suits load-bearing joints, stainless is chosen for corrosive environments, brass for electrical, plumbing and decorative use, and aluminium where weight matters. Material selection is finalized together during the quote stage based on your thread standard, operating environment and strength requirement.
We hold ISO tolerance classes such as h6/H7 on pilot and gauge diameters; ±0.01 mm is targeted on critical diameters. Metric thread profiles are cut to the appropriate class; on request, the fit of female-male adapters is verified with a gauge nut or bolt. State your tolerances on the drawing and we confirm feasibility before production.
Yes. The 126 standard types are a starting point; within the ⌀6–20 mm limit we produce to your own thread, wrench-size, length and flange dimensions. Send a technical drawing (PDF/DWG/STEP) or a dimensioned hand sketch; we have been machining at our Düzce workshop since 2009 and will review feasibility and return a quote.
Pricing is quotation-based; there is no fixed price list on the site because cost depends on material, quantity, tolerance and surface finish. Send your drawing with part type, material, quantity and tolerances via WhatsApp or email. We report lead time with the quote based on quantity and current workload, and we ship both domestically and for export.
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