WHEN YOU USE THE PROCEDURE TO WRENCH THE HEAD OF THE BOLT AS YOU INSTALL IT (SUCH AS WHEN YOU INSTALL THE BOLTS INTO PLATE NUTS, CLIP NUTS, BARREL NUTS, INSERTS OR TAPPED HOLES), USE THE MAXIMUM TORQUE SHOWN IN THE TABLE FOR THE NUT |10%.
WHEN YOU INSTALL B30LE OR B30PN BOLTS WITH AN N10HR NUT, USE THE TORQUE VALUES GIVEN WITH THE N10GW NUTS.
LUBRICATED BOLTS INCLUDE DRY-FILM-LUBRICATED (MIL-L-8937) BOLTS AND BOLTS WITH ANTI-FRICTION COMPOUNDS SUCH AS EASE-OFF 990, MIL-C-11796 AND MIL-G-23827 APPLIED TO THE THREADS.
Standard Torque Values for Bolts and Nuts (Pound-Inches)
Figure 202 (Sheet 2)
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CFM56 ENGINES
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WHEN YOU USE THE PROCEDURE TO WRENCH THE HEAD OF THE BOLT AS YOU INSTALL IT (SUCH AS WHEN YOU INSTALL THE BOLTS INTO PLATE NUTS, CLIP NUTS, BARREL NUTS, INSERTS OR TAPPED HOLES), USE THE MAXIMUM TORQUE SHOWN IN THE TABLE FOR THE NUT |10%.
WHEN YOU INSTALL B30LE OR B30PN BOLTS WITH AN N10HR NUT, USE THE TORQUE VALUES GIVEN WITH THE N10GW NUTS.
LUBRICATED BOLTS INCLUDE DRY-FILM-LUBRICATED (MIL-L-8937) BOLTS AND BOLTS WITH ANTI-FRICTION COMPOUNDS SUCH AS EASE-OFF 990, MIL-C-11796 AND MIL-G-23827 APPLIED TO THE THREADS.
MAXIMUM TORQUE PERMITTED TO ALIGN THE CASTELLATED NUT AND HOLE WHEN YOU INSTALL A COTTER PIN
OR OTHER SAFETY DEVICE.
Standard Torque Values for Bolts and Nuts (Pound-Inches) Figure 202 (Sheet 3)
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737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
NUT TIGHTENING TORQUE 1
N U T PART NUMBER AND STYLE N10HR (12-POINT), N10JG (12-POINT), N10HC (BARREL-NUT) NAS1804-1805 (12-POINT), N10GW (12-POINT), N10JB (PLATE-NUT), N10RM (PLATE-NUT), NAS577 (BARREL-NUT), N10JD (CASTELLATED-THICK STYLE 7/16 THRU 1-1/4 ONLY) POINT), N10JA (PLATE-NUT), N10B (12-
STYLE 12-POINT 12-POINT HEX HEAD PAN HEAD 100` HEAD
PART NUMBER B30NG B30FD B30NE B30LN B30LP
B30NH B30MR B30LM B30NS B30EM
B O B30MT B30US B30TR B30LE B30PN 2 B20NM NAS6603 THRU B30EM B30LU B30LR B30MS
L NAS6620 B30NN
T NAS6703 THRU
NAS6720
THREAD SIZE TORQUE (N.m)
DRY BOLT LUBED BOLT 3 DRY BOLT LUBED BOLT 3
2-56 OR 2-64 --- --- --- ---
4-40 OR 4-48 --- --- --- ---
6-32 OR 6-40 --- --- --- ---
8-32 OR 8-36 --- --- --- ---
10-32 --- --- 3.5-4 2-3
1/4-28 10-14 8-9 7.5-11 6-8
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