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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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