AMERICAN
Bolt Head Markings
TORQUE SPECIFICATIONS
Proper toque for American fasteners used on Bush Hog equipment.
Recommended Torque in Foot Pounds (Newton Meters).*
| BOLT DIAMETER |
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WRENCH | (IN.) “B” AND | SAE | SAE | SAE |
SIZE (IN.) “A” | THREAD SIZE | GRADE 2 | GRADE 5 | GRADE 8 |
Wrench Size “A”
SAE Grade 2
(No Dashes)
SAE Grade 5
(3 Dashes)
Bolt | |
Diameter | “B” |
|
SAE Grade 8
(6 Dashes)
7/16 | 1/4 - 2O UNC | 6 (7) | 8 (11) |
| 12 (16) |
7/16 | 1/4 - 28 UNF | 6 (8) | 10 (13) |
| 14 (18) |
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1/2 | 5/16 - 18 UNC | 11 (15) | 17 (23) |
| 25 (33) |
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1/2 | 5/16 - 24 UNF | 13 (17) | 19 (26) |
| 27 (37) |
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9/16 | 3/8 - 16 UNC | 20 (27) | 31 (42) |
| 44 (60) |
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9/16 | 3/8 - 24 UNF | 23 (31) | 35 (47) |
| 49 (66) |
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5/8 | 7/16 - 14 UNC | 32 (43) | 49 (66) |
| 70 (95) |
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5/8 | 7/16 - 20 UNF | 36 (49) | 55 (75) |
| 78 (106) |
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3/4 | 1/2 - 13 UNC | 49 (66) | 76 (103) |
| 106 (144) |
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3/4 | 1/2 - 20 UNF | 55 (75) | 85 (115) |
| 120 (163) |
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7/8 | 9/16 - 12 UNC | 70 (95) | 109 (148) |
| 153 (207) |
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7/8 | 9/16 - 18 UNF | 79 (107) | 122 (165) |
| 172 (233) |
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15/16 | 5/8 - 11 UNC | 97 (131) | 150 (203) |
| 212 (287) |
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15/16 | 5/8 - 18 UNF | 110 (149) | 170 (230) |
| 240 (325) |
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3/4 - 10 UNC | 144 (195) | 266 (360) |
| 376 (509) | |
3/4 - 16 UNF | 192 (260) | 297 (402) |
| 420 (569) | |
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7/8 - 9 UNC | 166 (225) | 430 (583) |
| 606 (821) | |
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7/8 - 14 UNF | 184 (249) | 474 (642) | 668 (905) | ||
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1 - 8 UNC | 250 (339) | 644 (873) |
| 909 (1232) | |
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1 - 12 UNF | 274 (371) | 705 (955) |
| 995 (1348) | |
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1 - 14 UNF | 280 (379) | 721 (977) |
| 1019 (1381) | |
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354 (480) | 795 (1077) |
| 1288(1745) | ||
397 (538) | 890 (1206) |
| 1444 (1957) | ||
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500 (678) | 1120 (1518) |
| 1817 (2462) | ||
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553 (749) | 1241 (1682) |
| 2013 (2728) | ||
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655 (887) | 1470 (1992) |
| 2382 (3228) | ||
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746 (1011) | 1672 (2266) |
| 2712 (3675) | ||
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870 (1179) | 1950 (2642) |
| 3161 (4283) | ||
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979 (1327) | 2194 (2973) | 3557 (4820) |
METRIC | olt | “B” | |
| B | r | |
| |||
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| te |
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| m | e |
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| ia |
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| D |
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Wrench
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 specificed torque values for lubricated fasteners.
Proper torque for metric fasteners used on Bush Hog equpment.
Recommended torque in foot pounds (newton Meters).*
| WRENCH | BOLT |
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| SIZE |
| DIA. | ASTM | ASTM | ASTM | ASTM |
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| (mm) “A” | (mm) “B” | 4.6 |
| 8.8 | 9.8 | 10.9 |
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|
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) | |
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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) | |||
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17