Murray 7800864, 7800888 1/2”, 1,000, NOTES, ft/lbs, ft/lbs, ft/lbs, ft/lbs, ft/lbs, ft/lbs, Size Of, Size Of, Nut, M8, Nut, 1/2-16, 1/2 - 16 x 2”, Screw, 1/2- 16 x

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
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.																														for
																																					7/8-14	155		210.8	440	598.4		660	897.6
																				Not
																																					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
0	10					20					30		40					50				60					70				80		90		100
																																						NOTES
																																	Body				1. These torque values are to be used for all hardware
																																					excluding: locknuts, self-tapping screws, thread forming
																																Diameter
																							Body Length														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)
																									Reproduction
																														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