Standard Torques - Robinson R22 Maintenance Manual

1.320 Standard Torques

1. Values in inch-pounds unless otherwise specified.
2. Values include nut self-locking torque.
3. Increase values 10% if torqued at bolt head.
4. Wet indicates threads lubricated with A257-9 anti-seize.
5. For elbow and tee fittings which require alignment, torque to indicated
value, then tighten to desired position.
6. Values ± 10% unless range is specified.
7. Unless otherwise specified, thread sizes 8-32 and smaller are not used for
primary structure and do not require control of torques.
FASTENER SERIES
NAS6603 thru NAS6608 Bolts
NAS1303 thru NAS1308 Bolts
NAS623 Screws
NAS1351 & NAS1352 Screws
NAS600 thru NAS606 Screws
AN3 Bolts
AN4 Bolts
AN6 Bolts
AN8 Bolts
AN502 & AN503 Screws
AN509 Screws
AN525 Screws
MS24694 Screws
MS27039 Screws
STAMPED NUTS
(PALNUTS)
TAPERED PIPE
THREADS
ROD END JAM NUTS
(AN315 and AN316)
OCT 2014
NOTE
SIZE EXAMPLE FASTENER
10-32
1/4-28
5/16-24
3/8-24
7/16-20
1/2-20
10-32
1/4-28
3/8-24
1/2-20
10-32 B330-7 (MS27151-7)
1/4-28 B330-13 (MS27151-13)
5/16-24 B330-16 (MS27151-16)
3/8-24 B330-19 (MS27151-19)
7/16-20 B330-21 (MS27151-21)
1/2-20 B330-24 (MS27151-24)
1/8-27
1/4-18
3/8-18
1/2-14
3/4-14
10-32
1/4-28
5/16-24
3/8-24
Chapter 1 General
NAS6603
NAS6604
NAS6605
NAS6606
NAS6607
NAS6608
AN3
AN4
AN6
AN8
N/A
N/A
N/A
N/A
N/A
AN315-3
AN316-4
AN316-5
AN316-6
DRY TORQUE
50 in.-lb
120 in.-lb
240 in.-lb
350 in.-lb
665 in.-lb
995 in.-lb
37 in.-lb
90 in.-lb
280 in.-lb
795 in.-lb
6 to 15 in.-lb
11 to 25 in.-lb
20 to 40 in.-lb
29 to 60 in.-lb
42 to 85 in.-lb
54 to 110 in.-lb
60 in.-lb
85 in.-lb
110 in.-lb
160 in.-lb
230 in.-lb
15 in.-lb
40 in.-lb
80 in.-lb
110 in.-lb
Page 1.33