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