Because of the larger tensile stress areas, they have high tension strength. However, a longer engagement is required for fine thread applications than for coarse series threads to prevent …

The minimum thread length shall be equal to one-half the nominal screw length plus 1/2″ or 6”, whichever is less. For extremely long lag screws or for specific applications, custom lag …

The lag thread is deeper and sharper than national coarse thread since it is designed to drive into wood and not to be used with a nut. Imported hex lag screws normally originate from Asia, …

2023年6月15日 · In the chart above a 7/8″ diameter bolt is noted as having a thread length of 1 1/2″. Per AISC the thread length is noted a minimum of 2″, for bolts up to 6″ in length. This …

All calculations are for Coarse Thread Series (UNC). Grade 2 calculations only cover fasteners 1 ⁄ 4 “-3 ⁄ 4 ” in diameter up to 6″ long; for longer fasteners the torque is reduced significantly. …

Our suite of comprehensive technical tools is designed specifically to provide engineers, architects, and the construction industry with a one-stop shop for technical fastener …

Heavy hex structural bolts are designed for steel-to-steel structural connections. Consequently, they are typically very short. Unless otherwise specified, F3125 structural bolts will have a …

A307B; F1554; A325; A490; A193; A320; Several ASTM specifications require a hex head that is larger than a standard (finished) hex head.

2014年10月27日 · Section 12.4.2 of ASTM A962 states that fasteners 1″ and under shall be coarse thread, and those 1-1/8″ & larger shall be 8 thread pitch series, unless otherwise …

2014年10月29日 · The cap screw length tolerance table states the cap screws are pointed or chamfered. What is the formula for the length of the pointed end. Typically for stud bolts, we …