Adapter, 1/4 In., Compatible Grainger Part Number 1VUR7, Compatible Threader Manufacturer Part Number 819, Product Type Nipple Chuck Pipe Adapter, Maximum Compatible Pipe Size 1/4 in, Features Holds Short or Close Nipples for Threading, Fits Brand Ridgid, For Use With Nipple Chuck Kit, Impact Rated No, Outside Diameter 1/4 in