Torque specifications, Metric american, Bolt head markings – Locke FP-172-C User Manual
Page 18
TORQUE SPECIFICATIONS
Proper torque for American fasteners used on Locke Turf equipment.
Recommended Torque in Foot Pounds (Newton Meters). *
WRENCH
SIZE (IN.) “A”
BOLT DIAMETER
(IN.) “B” AND
THREAD SIZE
SAE
GRADE 2
SAE
GRADE 5
SAE
GRADE 8
7/16
1/4 –20 UNC
6 (7)
8 (11)
12 (16)
7/16
1/4 –28 UNF
6 (8)
10 (13)
14 (18)
1/2
5/16 – 18 UNC
11 (15)
17 (23)
25 (33)
1/2
5/16 – 24 UNF
13 (17)
19 (26)
27 (37)
9/16
3/8 – 16 UNC
20 (27)
31 (42)
44 (60)
9/16
3/8 – 24 UNF
23 (31)
35 (47)
49 (66)
5/8
7/16 – 14 UNC
32 (43)
49 (66)
70 (95)
5/8
7/16 – 20 UNF
36 (49)
55 (75)
78 (106)
3/4
1/2 – 13 UNC
49 (66)
76 (103)
106 (144)
3/4
1/2 – 20 UNF
55 (75)
85 (115)
120 (163)
7/8
9/16 – 12 UNC
70 (95)
109 (148)
153 (207)
7/8
9/16 – 18 UNF
79 (107)
122 (165)
172 (233)
15/16
5/8 – 11 UNC
97 (131)
150 (203)
212 (287)
15/16
5/8 – 18 UNF
110 (149)
170 (230)
240 (325)
1-1/8
3/4 – 10 UNC
144 (195)
266 (360)
376 (509)
1-1/8
3/4 –16 UNF
192 (260)
297 (402)
420 (569)
1-5/16
7/8 – 9 UNC
166 (225)
430 (583)
606 (821)
1-5/16
7/8 – 14 UNF
184 (249)
474 (642)
668 (905)
1-1/2
1 –8 UNC
250 (339)
644 (873)
909 (1232)
1-1/2
1 – 12 UNF
274 (371)
705 (955)
995 (1348)
1-1/2
1 – 14 UNF
280 (379)
721 (977)
1019 (1381)
1-11/16
1-1/8 – 7 UNC
354 (480)
795 (1077)
1288 (1745)
1-11/16
1-1/8 – 12 UNF
397 (538)
890 (1206)
1444 (1957)
1-7/8
1-1/4 – 7 UNC
500 (678)
1120 (1518)
1817 (2462)
1-7/8
1-1/4 – 12 UNF
553 (749)
1241 (1682)
2013 (2728)
2-1/16
1-3/8 – 6 UNC
655 (887)
1470 (1992)
2382 (3228)
2-1/16
1-3/8 – 12 UNF
746 (1011)
1672 (2266)
2712 (1992)
2-1/4
1-1/2 – 6 UNC
870 (1179)
1950 (2642)
3161 (4283)
2-1/4
1-1/2 – 12 UNF
979 (1327)
2194 (2973)
3557 (4820)
Bo
lt
Dia
me
ter
"B
"
t
"
Wrench
Size "A"
SAE Grade 2
(No Dashes)
SAE Grade 5
(3 Dashes)
SAE Grade 8
(6 Dashes)
METRIC
AMERICAN
Bolt Head Markings
WRENCH
SIZE
(mm) “A”
BOLT
DIA.
(mm) “B”
ASTM
4.6
ASTM
8.8
ASTM
9.8
ASTM
10.9
8
5
1.8 (2.4)
5.1 (6.9)
6.5 (8.8)
10
6
3 (4)
8.7 (12)
11.1 (15)
13
8
7.3 (10)
21.1 (29)
27 (37)
16
10
14.5 (20)
42 (57)
53 (72)
18
12
25 (34)
74 (100)
73 (99)
93 (126)
21
14
40 (54)
118 (160)
116 (157)
148 (201)
24
16
62 (84)
167 (226)
181 (245)
230 (312)
30
20
122 (165)
325 (440)
449 (608)
33
22
443 (600)
611 (828)
36
24
211 (286)
563 (763)
778 (1054)
41
27
821 (1112)
1138 (1542)
46
30
418 (566)
1119 (1516)
1547 (2096)
Proper torque for American fasteners used on Locke Turf equipment.
Recommended Torque in Foot Pounds (Newton Meters). *
Numbers appearing on bolt heads
Indicate ASTM class.
*Use 75% of the specified torque value
for plated fasteners. Use 85% of the
specified torque values for lubricated
fasteners.
Bo
lt
Dia
me
ter
"B
"
Wrench
Size "A"
8.8
18