#

**14** is close to, but not exactly the

**same** as,

**1/4**-inch.) The major diameter in Unified threads = 0.060\u2033 + 0.013\u2033 x (numbered diameter). So #2 has a major diameter of 0.086\u2033. ... We see that #

**14** would be 0.242 inches and #

**1/4** is 0.250 inches.

Apr 10, 2012');})();(function(){window.jsl.dh('_VBZuYIb7Lqux0PEP2IqLsAk81','

Fastener and Screw / Bolt Design, Formula and Calculations

**Screw** Size | Class Thread | Major **Diameter** |
---|

3-56 | 3A | 0.0990 |

**4-40** | 2A | 0.1120 |

**4-40** | 3A | 0.1120 |

4-48 | 2A | 0.1120 |

56 more rows');})();(function(){window.jsl.dh('_VBZuYIb7Lqux0PEP2IqLsAk87','

**M4** x 10mm Cross Recessed Pan Head Machine **Screws**. Thread Diameter: 4mm, Thread Pitch: 0.7mm, Thread Length: 10mm. Head Diameter: 8mm, Head Height: 3.2mm, Head Style: Pan.