Case 621G - Torque Charts

8-SPECIFICATIONS
Torquecharts
Usethetorquesinthischartwhenspecialtorquesarenotgiven.ThesetorquesapplytofastenerswithbothUNC
andUNFthreadsasreceivedfromsuppliersdry,orwhenlubricatedwithengineoil.Notapplicableifspecialgraphite
lubricants,Molydisuldegreases,orotherextremepressurelubricantsareused.
Decimalhardware
Grade5bolts,nuts,andstuds
Size
Nm
lbin/lbft
1/4in
12–15Nm108–132lbin
5/16in
23–28Nm204–252lbin
3/8in
48–57Nm420–504lbin
7/16in
73–87Nm
54–64lbft
1/2in
109–130Nm
80–96lbft
9/16in
149–179Nm
110–132lbft
5/8in
203–244Nm
150–180lbft
3/4in
366–439Nm
270–324lbft
7/8in
542–651Nm
400–480lbft
1in787–944Nm
580–696lbft
1-1/8in
1085–1193Nm
800–880lbft
1-1/4in
1519–1681Nm
1120–1240lbft
1-3/8in
1980–2278Nm
1460–1680lbft
1-1/2in
2631–2983Nm
1940–2200lbft
MarkingsforGrade5hardware
Grade8bolts,nuts,andstuds
Size
Nm
lbin/lbft
1/4in
16–20Nm144–180lbin
5/16in
33–39Nm288–348lbin
3/8in
61–73Nm540–648lbin
7/16in
95–114Nm
70–84lbft
1/2in
149–179Nm
110–132lbft
9/16in
217–260Nm
160–192lbft
5/8in
298–358Nm
220–264lbft
3/4in
515–618Nm
380–456lbft
7/8in
814–976Nm
600–720lbft
1in1220–1465Nm
900–1080lbft
1-1/8in
1736–1953Nm
1280–1440lbft
1-1/4in
2468–2712Nm
1820–2000lbft
1-3/8in
3227–3688Nm
2380–2720lbft
1-1/2in
4285–4827Nm
3160–3560lbft
MarkingsforGrade8hardware
NOTE:usethicknutswithGrade8bolts.
8-48