Inch series3 standards18 specification pages
1/2-13 Fasteners
Every 1/2-13 screw, bolt and nut in the database. 1/2-13 has a nominal major diameter of 0.5 in, threaded 13 tpi to the UNC series, across 3 standards. Rivets are not on this page: they carry no thread, so they are indexed by shank diameter rather than by size designation.
Nominal Ø0.5 in
Threads per inch13 tpi
Pitch Ø0.45 in
Tap drill0.4231 in
1/2-13 thread dimensions
Full thread page- Designation
- 1/2-13 UNC
- Major diameter
- 0.5 in
- Threads per inch
- 13 tpi
- Pitch diameter
- 0.45 in
- Minor diameter — external
- 0.4055 in
- Minor diameter — internal
- 0.4165 in
- Tap drill size
- Ø 0.4231 in
1/2-13 Bolts
9 pagesASME B18.2.1Hex Head Cap Screw — Inch Series
1/2-13 Screws
8 pagesASME B18.3Socket Head Cap Screw — Inch Series
1/2-13 Nuts
1 pagesASME B18.2.2Hex Nut — Inch Series