1/2-20 UNF to 1/2-28 UNEF Thread Adapter

Thread adapter, female 1/2-20 UNF (barrel side) to male 1/2-28 UNEF (suppressor side). Lets you mount a suppressor with a 1/2-28 UNEF thread onto a barrel with a 1/2-20 UNF thread. Design notes: the internal thread is modelled 0.2 mm oversize and the external thread 0.1 mm undersize for easy fit after printing.

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