70-20-02
 ALL  ú ú C01 Page 206 ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
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)  POINT), N10JB (PLATE-NUT), N10RM (PLATE-NUT), NAS577 (BARREL-NUT), N10JD (CASTELLATED-THICK STYLE 7/16 THRU 1-1/4 ONLY) NAS1804-1805 (12-POINT), N10GW (12-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 (POUND-INCHES) 
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  --- --- 30-35  20-25 
1/4-28  90-125  70-80  65-100  50-75 
5/16-24  180-250  145-180  130-200  90-125 
3/8-24  300-500  275-330  220-410  150-250 
7/16-20  510-840  370-440  370-690  260-425 
1/2-20  870-1300  500-575  630-1070  440-650 
9/16-18  1300-1800  800-1000  1000-1470  700-920 
5/8-18  1900-2300  1350-1650  1400-1900  1000-1200 
3/4-16  3300-4300  2800-3300  2400-3500  1700-2150 
7/8-14  5100-6700  2900-4500  3700-5500  2600-3400 
1-12 OR 1-14  7000-10,900  6200-7000  5100-8900  3600-5500 
1-1/8-12  9500-13,000  8300-9400  6900-10,700  4900-6700 
1-1/4-12 1-3/8-12 1-1/2-12  15,800-19,200 20,000-24,000 --- 11,000-12,000 16,000-17,000 --- 11,500-15,700 ------ 7500-9700 ------

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 1)

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 70-20-02
 ALL  ú
 ú  C01  Page 207
 ú  Nov 15/91 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
1NUT TIGHTENING TORQUE 
PART NUMBER  N10JC (SHEET METAL HEX-SIZES #4 THRU 7/16 ONLY),  AN316, AN316C, NAS509, NAS1423 
N  AND STYLE  ALL PLATE-NUTS EXCEPT N10JA, N10JB, AND N10RM,  (JAM NUTS), N10JC, MS21245 
U  MS21042 HEX, MS21043 HEX, N10JD (CASTELLATED-ALL CLIP-NUTS, INSERTS, AND TAPPED HOLES,  (HEX SIZES 1/2 THRU 1-1/2), N10JD, MS14145 (CASTELLATED-
T  THICK STYLE ALL SIZES 3/16 THRU 1-1/4), MS14144 THIN STYLE ALL SIZES -103 THRU 
(CASTELLATED- THICK STYLE)  -120) 
STYLE  12-POINT  HEAD HEX  HEAD PAN  HEAD 100`  HEAD SOCKET  ALL 
PART NUMBER  B30LT  B30LJ  B30LK  B30PC  MS21262  ALL 
B30NL  B30NR  B30NT  B30LH  MS24678 
B  B30NJ  B30NF  B30BE  B30RF  NAS1351 
T L O  B30UU B30NK  NAS6220 THRU NAS6203 NAS1802B30PW NAS1801 THRU 572 NAS563 S12CB B30PU B30PF  THRU NAS623 NAS606 NAS600 NAS1218 NAS1217 B30BG  B30UW B30SW  NAS1352 
　
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