1 4 Bolt Torque

Grade 2 5 and 8 values are for slightly lubricated bolts.

1 4 bolt torque. The screw head is designed to fit a ratchet or spanner torque wrenches allowing you to tighten the screw to your exact specifications. 1 can be rearranged to express bolt force as. When a wrench is stored below freezing you run the risk of developing condensation that can cause the internals to rust affecting the accuracy and performance of the tool. Clamp loads are based on 75 of the minimum proof loads for each grade and size.

Cdi click style clicker torque wrenches. Astm a449 covers headed bolts ranging from 1 4 inch to 3 inches in diameter. F t k d 1 l 100 1a example dry vs. The washers have 4 bent prongs to allow it to be embedded into wood plywood and other ductile materials.

Grade 2 calculations only cover fasteners 1 4 3 4 in diameter up to 6 long. Find the bolt torque chart for the astm a449 and sae grade 5 sae j429 grade 5 bolts. Coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8. Avoid storing cdi clickers below 32 degrees fahrenheit and above 120 degrees fahrenheit.

This type of bolt has medium strength bolt manufactured from a medium carbon or alloy. Hex head cap screws are typically used to create a bolted joint in which a. Fine thread figures are for 1 14. Us recommended bolt torque.

Grade 2 grade 5 grade 8 18 8 s s bronze brass. These figures represent an estimate of torque torque being the measurement of friction not tension required to induce given preload clamp load in a bolt. Tightening torque guide for grade 5 8 hex cap screws this table is based on ifi 5th edition technical data n 12 n 16 using equation 1 and a torque coefficient k 0 20 for non plated steel fasteners and k 0 15 for plated fasteners. Sizes from 1 4 up are in lb ft.

The torque required to achieve this force with a dry bolt is calculated to 2022 nm. 3 4 to 1 1 2in. These estimated torque values are derived from the standard torque formula torque kdf utilizing a standard free spinning nut non locknut with a proof strength equal to or greater than the tensile strength of the bolt. The hex head cap screw is a common fastener in construction and machine assembly.

Astm a449 is identical in chemical properties and is used in general engineering applications. 1 4 20 cap screws hex bolts. Print this page. The proof load for a m30 metric bolt grad 8 8 is 337000 n.

For longer fasteners the torque is reduced significantly.