SERVICE 7
AQUATECH OPERATIONS, SERVICE AND PARTS MANUAL
A Product of Hi-Vac Corporation
SERVICE
Torque Specifications
Aquatech B-Series
Bright Cap Screws 1018 ft. lbs.
CAP SCREW DIAMETER
YIELD STRENGTH PSI MIN.
RECOMMENDED TORQUE
UNC
UNF
¼
58000
11
13
5/16
58000
21
23
3/8
58000
38
40
7/16
58000
55
60
½
58000
85
95
9/16
55000
125
140
5/18
55000
175
210
¾
55000
300
330
7/8
55000
450
490
1
50000
680
715
1-1/8
50000
885
990
1-1/4
40000
1255
1380
1-3/8
40000
1635
1875
1-1/2
40000
2180
2430
Heat Treated 1038 Hexagon Head Cap Screws, SAE Grade
5 ft. lbs.
CAP SCREW DIAMETER
YIELD
STRENGTH PSI
MIN.
TENSILE
STRENGTH PSI
MIN.
RECOMMENDED TORQUE
UNC
UNF
¼
90000
120000
11
13
5/16
90000
120000
21
23
3/8
90000
120000
38
40
7/16
90000
120000
55
60
½
90000
120000
85
95
9/16
90000
120000
125
140
5/8
90000
120000
175
210
¾
90000
120000
300
330
7/8
81000
115000
450
490
1
77000
115000
680
715
1-1/8
77000
105000
885
990
1-1//4
77000
105000
1255
1380
1-3/8
77000
105000
1635
1875
1-1/2
77000
105000
2180
2430
Alloy Hexagon Head Cap Screws, SAE Grade 8 ft. lbs.
CAP SCREW DIAMETER
YIELD
STRENGTH PSI
MIN.
TENSILE
STRENGTH PSI
MIN.
RECOMMENDED TORQUE
UNC
UNF
¼
130000
150000
12
15
5/16
130000
150000
25
30
3/8
130000
150000
50
60
7/16
130000
150000
85
95
½
130000
150000
125
140
9/16
130000
150000
175
195
5/8
130000
150000
245
270
¾
130000
150000
425
460
7/8
130000
150000
660
700
1
130000
150000
990
1050
1-1/8
130000
150000
1470
1655
1-1//4
130000
150000
2100
2310
1-3/8
130000
150000
2750
3110
1-1/2
130000
150000
3640
4100
Alloy Cap Screws 1018 ft. lbs.