4-1/2", US, 20
US Fasteners, 4-1/2", 20 |
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![]() Hex boltsBolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts. |
![]() Machine screwsScrews with machine threads for use with a nut or in a tapped hole. |
![]() Carriage bolts & Plow boltsBolts with no drive and machine threads for use with a nut. |
![]() Socket screwsScrews with an Allen wrench drive. |
![]() Hanger bolts & Dowel screwsHanger bolts and dowel screws are used for adding an external machine or screw thread to wood applications. |
![]() Shoulder boltsScrews with an unthreaded shoulder that is larger in diameter than the threads. Also known as stripper bolts. |