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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.

Manufacturing Scope

Nuts 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, with critical dimensions to ±0.01 mm. 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.

Part Families

Cap Nut (Dome)Hex cap nut with domed closed end that seals the thread tip for protection and aesthetics.8 types⌀6.4–19.6 mmOpen the code & size table →Standard Hex NutClassic standard-height hex nut for general fastening and assembly connections.9 types⌀6.4–19.6 mmOpen the code & size table →High / Tall NutIncreased-height hex nut providing more thread engagement for high tensile loads.8 types⌀6.4–19.6 mmOpen the code & size table →Coupling / Extension NutLong hex coupling nut that axially joins two threaded rods with a through internal thread.9 types⌀6.4–19.6 mmOpen the code & size table →Threaded Sleeve (Round Coupler)Round-body threaded sleeve with internal thread that couples threaded rods on a smooth outer surface.9 types⌀6–18 mmOpen the code & size table →Flanged Hex NutHex nut with an integrated washer flange that spreads load and removes the need for a separate washer.8 types⌀7.6–19.6 mmOpen the code & size table →Knurled Thumb NutHand-tightened knurled round nut for quick tool-free assembly and removal.8 types⌀8–18 mmOpen the code & size table →Reduction Nipple (Male-Male)Male-male reduction nipple joining two different external thread sizes in a step.10 types⌀7–16 mmOpen the code & size table →Female-Male Thread AdapterAdapter with external thread on one end and internal threaded bore, converting between sizes.10 types⌀7–18 mmOpen the code & size table →Hex Transition NippleTransition nipple with central hex wrench flats and external threads on both ends.10 types⌀8.1–19.6 mmOpen the code & size table →Threaded Reduction Bush (Female-Female)Bored reduction bush with internal threads of different sizes tapped from each end.7 types⌀9–20 mmOpen the code & size table →Tapered Thread Transition AdapterTransition adapter with a centering tapered body and an external thread at the tip.10 types⌀8–20 mmOpen the code & size table →Hex-Body Thread AdapterSingle-ended adapter with an external thread and internal thread on a hex wrench-flat body.10 types⌀8.1–19.6 mmOpen the code & size table →Knurled Transition NippleTransition nipple with a knurled grip body and external threads on both ends.10 types⌀8–20 mmOpen the code & size table →

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.

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