Robinson R66 - Standard Torques

20-32 Standard Torques
NOTE
1. Torque values are in inch-pounds unless otherwise specified.
2. Torque values include nut self-locking torque.
3. Increase torque 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. Tolerance is ± 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 SIZE EXAMPLE FASTENER DRY TORQUE
NAS6603 thru NAS6608 Bolts
NAS1303 thru NAS1308 Bolts
NAS623 Screws
NAS1351 & NAS1352 Screws
NAS600 thru NAS606 Screws
10-32 NAS6603 50 in.-lb
1/4-28 NAS6604 120 in.-lb
5/16-24 NAS6605 240 in.-lb
3/8-24 NAS6606 350 in.-lb
7/16-20 NAS6607 665 in.-lb
1/2-20 NAS6608 995 in.-lb
AN3 Bolts
AN4 Bolts
AN6 Bolts
AN8 Bolts
AN502 & AN503 Screws
AN509 Screws
AN525 Screws
MS24694 Screws
MS27039 Screws
10-32 AN3 37 in.-lb
1/4-28 AN4 90 in.-lb
3/8-24 AN6 280 in.-lb
1/2-20 AN8 795 in.-lb
STAMPED NUTS
(PALNUTS)
10-32 B330-7 (MS27151-7) 6–15 in.-lb
1/4-28 B330-13 (MS27151-13) 11–25 in.-lb
5/16-24 B330-16 (MS27151-16) 20–40 in.-lb
3/8-24 B330-19 (MS27151-19) 29–60 in.-lb
7/16-20 B330-21 (MS27151-21) 42–85 in.-lb
1/2-20 B330-24 (MS27151-24) 54–110 in.-lb
TAPERED PIPE
THREADS
1/8-27 N/A 60 in.-lb
1/4-18 N/A 85 in.-lb
3/8-18 N/A 110 in.-lb
1/2-14 N/A 160 in.-lb
3/4-14 N/A 230 in.-lb
ROD END JAM NUTS
(AN315 and AN316)
10-32 AN315-3 15 in.-lb
1/4-28 AN316-4 40 in.-lb
5/16-24 AN316-5 80 in.-lb
3/8-24 AN316-6 110 in.-lb
Page 20.6 Chapter 20 Standard Practices APR 2019