Bush Hog Parts Diagram and SAE Torque Specifications for Grade 8 Bolts

AMERICAN

Bolt Head Markings

TORQUE SPECIFICATIONS

Proper toque for American fasteners used on Bush Hog equipment.

Recommended Torque in Foot Pounds (Newton Meters).*

WRENCH	BOLT DIAMETER	SAE	SAE	SAE
	(IN.) “B” AND
SIZE (IN.) “A”	THREAD SIZE	GRADE 2	GRADE 5	GRADE 8
7/16	1/4 - 2O UNC	6 (7)	8 (11)	12 (16)

Wrench Size “A”

SAE Grade 2 (No Dashes)

SAE Grade 5

(3 Dashes)

Bolt “B”

Diameter

SAE Grade 8

(6 Dashes)

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	(3675)
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)

METRIC	Bolt “B”
	Diameter

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 specified torque values for lubricated fasteners.

Proper torque for metric fasteners used on Bush Hog equipment.
Recommended torque in foot pounds (newton Meters).*
WRENCH			BOLT	ASTM		ASTM		ASTM		ASTM
SIZE			DIA.
(mm) “A”		(mm) “B”		4.6		8.8		9.8		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)
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