Relative Strength Marking or Bolt Markings Dia. Wrench Maximum Torque Maximum Torque Maximum Torque Maximum Torque Maximum Torque. Metric Fasteners - Socket Screws Torque Figures, Alloy Steel ; Size, Socket Head Cap, · Low Head Socket Cap, ; M3, Nm, Nm ; M4, Nm, Classic Bolts (Metric Coarse) ; M24 x 3, , , , Below is a list of bolt torques compiles from various machine tool manufacturers. In general the proper torque spec is usually around % of the failure. Tightening torque for stud bolts in cold service ASTM A Grade L7 standard. The torque tables are built on specific assumptions regarding bolt and nut. Maximum Tightening Torques ; M8, Nm, Nm, Nm, Nm ; M10, Nm, Nm, Nm, Nm. The bolting standard will define whether the torque value is for a dry or lubricated stud/bolt thread. If a bolt is torqued rather than the nut, then the torque.
Tightening the screws with low rpm's without interruptions. Impact wrenches are not recommended for torquing series stainless steel fasteners. The. Torque Values Stainless Steel Bolt Table Chart ; , , , , ; 1/, , , , If a screw is lubricated, the friction in the threads and under the head is decreased and the relation between tightening torque and clamping force is changed.
, psi. , psi. , psi. , psi. US BOLT TORQUE SPECIFICATIONS *** (lbs/ft). Bolt. Grade 2. Grade 5. Grade 8. SHCS. 1/4" Maximum torque: 2,Nm (= %) (or %) Mean torque if scatter is +23% = 2, / = 1, Nm. Minimum torque if scatter is +23% = 1, x = 1, Torque values for various grades and diameters of fasteners. Bolt Size, TPI, Proof Load (lbs), Clamp Load (lbs), Tightening Torque (ft lbs).
Size (mm), Typical Maximum Tightening Torque (Nm). Property Class. Grade , Grade , Grade , Grade M5, , , , ** Torque values for 1/4" and. 5/16" sizes are in inch lb. All other torque values are in foot lb. Grade C. Grade B. Grade G. The torque figures quoted have been based on a theoretical bolt load equal to 85% of the proof load of the bolting material. Where the proof load is not quoted.
Suggested bolt tightening torque in N·m (Newton metres). Wrench/spanner test torques in area of the screw is 20 mm x = 0, mm = 5 µm. Bolts and screws are so ubiquitous that it's impossible to fully articulate Even experienced tradesmen over-or under-torque bolts. All thru 20 mm. Torque. Class ISO Metric Coarse. Pitch Bolts and Screws Torque. BSW Mild Steel Bolts & Screws. RECOMMENDED ASSEMBLY TORQUES. WDS. If there's at least 20mm of thread engagement, and the holes/fasteners are clean, that doesn't sound too high in a quality Al block. If you're using oil or anti.