Found 2 3D-models for “38 UNC” across many websites

#three eights inch#three eights#strobist#photography#three#UNC#quarter#inch#hotshoe#38-16
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Hot Shoe Flash holder with 3/8 UNC thread

Hot Shoe Flash holder with 3/8 UNC thread

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Photography Gear Thread Protector Cap

Photography Gear Thread Protector Cap

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