Briggs & Stratton 7800439 ction, Reprodu, Hardware Identification & Torque Specifications, 10.9

Hardware Identification & Torque Specifications

							Torque Specification Chart																											Torque Specification Chart
			FOR STANDARD METRIC MACHINE HARDWARE (Tolerance ± 20%)																															FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)
		Property				5.6							8.8										10.9					12.9						Hardware		No
																																			Marks
		Class																																Grade
									Class 5.6							Class 8.8							Class 10.9							Class 12.9					SAE Grade 2			SAE Grade 5			SAE Grade 8
		Size Of					in/lbs							in/lbs								in/lbs							in/lbs					Size Of	in/lbs			in/lbs			in/lbs
		Hardware						ft/lbs				Nm.			ft/lbs			Nm.				ft/lbs					Nm.		ft/lbs			Nm.		Hardware	ft/lbs		Nm.	ft/lbs		Nm.	ft/lbs	Nm.
		M3				5.88					.56		13.44				1.28				19.2					1.80		22.92			2.15			8-32	19		2.1	30	3.4		41	4.6
		M4				13.44					1.28		30.72				2.90				43.44					4.10		52.56			4.95			8-36	20		2.3	31	3.5		43	4.9
		M5				26.4					2.50		60.96				5.75				5.97					8.10		7.15			9.7			10-24	27		3.1	43	4.9		60	6.8
		M6				44.64					4.3						9.9				10.3					14		12.1			16.5			10-32	31		3.5	49	5.5		68	7.7
													7.3
		M7				5.2					7.1		12.1				16.5				16.9					23		19.9			27			1/4-20	66		7.6	8	10.9		12	16.3
		M8				7.7					10.5		17.7				24						25			34		29			40			1/4-28	76		8.6	10	13.6		14	19.0
		M10				15					21		35				48						50			67		59			81			5/16-18	11		15.0	17	23.1		25	34.0
		M12				26					36		61				83				86.2					117		103			140			5/16-24	12		16.3	19	25.8		29	34.0
		M14				42					58		101				132						136			185		162			220			3/8-16	20		27.2	30	40.8		45	61.2
		M16				64					88		147				200						210			285		250			340			3/8-24	23		31.3	35	47.6		50	68.0
		M18				89					121		202				275						287			390		346			470			7/16-14	30		40.8	50	68.0		70	95.2
		M20				126					171		290				390						405			550		486			660			7/16-20	35		47.6	55	74.8		80	108.8
		M22				169					230		390				530						559			745		656			890			1/2-13	50		68.0	75	102.0		110	149.6
		M24				217					295		497				375						708			960		840			1140			1/2-20	55		74.8	90	122.4		120	163.2
		M27				320					435		733				995				1032					1400		1239			1680			9/16-12	65		88.4	110	149.6		150	204.0
		M30				435					590		995				1350				1401					1900		1681			2280			9/16-18	75		102.0	120	163.2		170	231.2
		M33				590					800		1349				1830				1902					2580		2278			3090			5/8-11	90		122.4	150	204.0		220	299.2
		M36				759					1030		1740				2360				2441					3310		2935			3980			5/8-18	100		136	180	244.8		240	326.4
		M39				988					1340		2249				3050				3163					4290		3798			5150			3/4-10	160		217.6	260	353.6		386	525.0
																															for
The guides and ruler furnished below are designed to																																		3/4-16	180		244.8	300	408.0		420	571.2
																																		7/8-9	140		190.4	400	544.0		600	816.0
help you select the appropriate hardware.
																																		7/8-14	155		210.8	440	598.4		660	897.6
																																		1-8	220		299.2	580	788.8		900	1,244.0
																																		1-12	240		326.4	640	870.4		1,000	1,360.0
																								Not
0	10					20					30		40				50			60			70 80 90								100
																																			NOTES
																																		1. These torque values are to be used for all hardware
																													Body
																																		excluding: locknuts, self-tapping screws, thread forming
																												Diameter
																					Body L ngth													screws, sheet metal screws and socket head setscrews.
				Nut, M8															Screw, M8- 1.25 x 25															2. Recommended seating torque values for locknuts:
																																		a. for prevailing torque locknuts - use 65% of grade 5
																																		torques.
					Thread											Thread									Distance between							Body
																																		b. for flange whizlock nuts and screws - use 135% of
			Diameter (mm)													Diameter (mm)									threads (mm)							Length (mm)
																																		grade 5 torques.
		Inside								Threads						Body										Threads					Body
																																		3. Unless otherwise noted on assembly drawings, all torque
		Diameter (in) per inch														Diameter										per inch					Length (in)
																																	ction
																						Reprodu
																																	values must meet this specification.
				Nut, 1/2-16															Screw, 1/2- 16 x 2

0

1/2

1

1/2

2

1/2

3

1/2

4

1/4

3/4

1/4

3/4

1/4

3/4

1/4

3/4

Standard Hardware Sizing

When a washer or nut is identified as 1/2” (M8), this is the Nominal size, meaning the inside diameter is 1/2 inch (8mm metric thread diameter); if a second number is present it represents the threads per inch (distance between threads).

When bolt or capscrew is identified as 1/2 - 16 x 2” (M8 - 1.25 x 50 ), this means the Nominal size, or body diameter is 1/2 inch (8mm metric thread diameter), the second number,16, represents the threads per inch, (1.25 thread diameter). The final number is the body length of the bolt or screw, 2 inches (50mm).

Common Hardware Types

Hex Head Capscrew			Washer
			Lockwasher
Carriage Bolt
			Hex Nut
Wrench & Fastener Size Guide
1/4” Bolt or Nut	5/16” Bolt or Nut	3/8” Bolt or Nut	7/16” Bolt or Nut	1/2” Bolt or Nut
Wrench—7/16”	Wrench—1/2”	Wrench—9/16”	Wrench (Bolt)—5/8”	Wrench—3/4”
			Wrench (Nut)—11/16”
M6 Bolt or Nut	M8 Bolt or Nut	M10 Bolt or Nut	M12 Bolt or Nut	M14 Bolt or Nut
Wrench—10mm	Wrench—13mm	Wrench—17mm	Wrench—19mm	Wrench—22 mm