Bolts Torque Chart. Grade 2, 5, and 8 values are for slightly lubricated bolts. The classes are set by the international standards organisation or iso.
This chart of estimated torque calculations are only offered as a guide. Stud bolt weight includes 2 heavy hex steel nuts. Astm a325 powered by portland bolt.
(Mm) Typical Maximum Tightening Torque (Nm) Property Class.
Suggested starting torque values astm a307 bolt size 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1 1 1 1 2 2 2 2 3 3 3 3 4 Use of its content by anyone is the sole responsibility of that person and. Properly torqued bolts will provide the maximum amount of clamping force under load.
All Calculations Are For Coarse Thread Series (Unc).
9702365 • as 06/14 torque poster for additional technical information, contact fastenal engineering at firstname.lastname@example.org. Bolt grades, torque specs metric tap & drill chart metric thread sizes thread size* tap drill size** m1.6 x 0.35 1.25mm or #55 m2 x 0.4 1.60mm or #52 m2.5 x 0.45 2.05mm or #46 The entire bolt pattern shall be tightened at least three times around the flange at 30%, 70%, and 100% of the torque value.
Maximum Tightening Torque For Coarce Threaded Metric Steel Bolts:
The torque values are approved for spiral wound graphite and ptfe. The torque chart is for reference only and assumes properly lubricated astm a193 b7 stud bolts with astm a194 2h steel nuts. Bolts must be tightened using the correct torque.
This Website Covers Technical Aspects Of The Original Astm A325 Specification Which Was Withdrawn By Astm International In 2016 And Replaced By Astm F3125.
The data in the chart is measured under 60% yield limit of the bolt, the recommended tightening. Standard recommended torque spec for each size bolt: Tightening torque for unlubricated steel bolts.
Torque Has Been Converted Into Ft/Lbs By Dividing The Result Of The Formula By 12 4.
Metric bolt torque specifications*** (lbs/ft) bolt grade 8.8 grade 10.9 grade 12.9 allen m6 x 1.0 7 11 12 12 m8 x 1.25 17 26 29 29 m10 x 1.5 34 51 57 57. Pipe flange bolt torque chart. Standard and fine pitch m6 <> m36.