THREADED FASTENER TENSION GUIDE ( Figures Represent Pounds of Clamping Force )
Stress Area	0.0091	0.0141	0.0175	0.0318	0.0524	0.0775	0.1063	0.1419	0.1819	0.226	0.3344	0.4617	0.6057	0.7632	0.9691	1.4052	1.8993
Outside Diameter	No.6	No.8	No.10	1/4"	5/16"	3/8"	7/16"	1/2"	9/16"	5/8"	3/4"	7/8"	1"	1-1/8"	1-1/4"	1-1/2"	1-3/4"
Threads Per Inch	32	32	24	20	18	16	14	13	12	11	10	9	8	7	7	6	5
Torque: 5 lb.in.	205	157
10 lb.in.	410	316	315
20 lb.in.	820	632	630	337
40 lb.in.		1264	1264	674	541
80 lb.in.				1348	1082	987
10 lb.ft.				2043	1625	1482	1224
20 lb.ft.				4092	3250	2964	2448	2143
40 lb.ft.					6503	5928	4896	4286	3899
80 lb.ft.						11857	9796	8572	7799	7065
100 lb.ft.							12245	10716	9749	8832	7915
125 lb.ft.								13395	12186	11049	9894
150 lb.ft.								16091	14623	13261	11872
175 lb.ft.									17061	15462	13851	12117
200 lb.ft.									19498	17664	15830	13836	12113
250 lb.ft.									24373	22100	19788	17296	15142	11985
300 lb.ft.										26523	23745	20776	18170	14382	13247
400 lb.ft.											31660	27700	24227	19176	17663
500 lb.ft.											39576	34592	30284	23971	22079	19754
750 lb.ft.												51941	45426	35956	33118	29631	22678
In some cases it may be desirable to know the total clamping force obtained for a given torque. Values are approximate. SAE 30 engine oil was used as lubricant. Use of high stress lube may increase value 20% or more. Highest values for a given size may only be obtained with heat treated bolts having minimum tensile strengths of 150,000 P.S.I. or more.									* Stress area is calculated as the area of the circle whose diameter is the mean between the root and pitch diameters. This closely approximates the actual stress condition. Maximum theoretical clamping force cannot be obtained from threaded fasteners. Additional stresses to the fastener are caused by the torsional forces of tightening.

GENERAL TORQUE SPECIFICATION CHART FOR I.F.I.* METRIC FASTENERS** ( when SAE10 oil is used as a lubricant )
Minimum Tensile *** Strength Mpa		400	420	520	830	900	1040	1220
Proff Load MPa		225	310	380	600	650	830	970
Property Class		4.6	4.8	5.8	8.8	9.8	10.9	12.9
Bolt Diameter		torque: Newton Metre
metric	inch	torque: Newton Metre
5mm	0.197	2.9	4	5	-	8	11	12
6mm	0.236	5	7	8	-	14	18	21
7mm	0.276	8	11	14	-	24	30	35
8mm	0.315	12	16	20	-	34	44	50
10mm	0.394	23	32	40	-	70	85	100
12mm	0.472	40	56	70	-	120	150	180
14mm	0.551	65	90	110	-	190	240	280
16mm	0.63	100	140	170	270	290	380	440
20mm	0.787	200	-	330	520	-	740	860
24mm	0.945	340	-	580	920	1260	1480	-
30mm	1.181	680	-	-	1820	-	2520	2940
* Megapascal Note: Use only when manufacture's specifications are not available, these values are for stiff metal-to-metal joints and are based on 90% of proof load. DO NOT USE for gaskets joints or joints of soft materials. * I.F.I. = Industrial fasteners Institute.

GENERAL TORQUE SPECIFICATION CHART FOR I.S.O. METERIC FASTENERS* ( when SAE 10 oil is used as a lubricant )
Minimum Tensile Strength	kg/mm2 P.S.I.	40		50		60			80	100	120
Minimum Tensile Strength	kg/mm2 P.S.I.	56900		71100			85340		113800	142200	170700
Proof	kg/mm2	22.6	29.1	28.2	36.4	33.9	43.7	47.5	58.2	79.2	95
Load	P.S.I.	32150	41390	40110	51770	48220	62160	67560	82780	112650	135130
Property Class		4.6	4.8	5.6	5.8	6.6	6.8	6.9	8.8	10.9	12.9
Bolt Diameter		Figures are KILOGRAM METER except those that are bolded which are KILOGRAM CENTEMETER
Metric	Inch
6mm	0.236	49	63	61	79	74	95	103	126	172	206
8mm	0.315	119	153	148	191	178	230	250	306	417	500
10mm	0.394	235	303	294	379	353	455	495	606	8.2	10
12mm	0.472	411	529	427	662	616	7.9	8.6	10.5	14	17
14mm	0.551	654	8.4	8.2	10.5	10	12	13	17	23	27
16mm	0.63	10	13	12	16	15	20	21	26	36	43
18mm	0.709	14	18	17	23	21	27	30	36	49	59
22mm	0.866	27	35	34	44	41	52	57	70	95	114
* NOTE: Use only when manufacture's specifications are not available, these values are for stiff metal-to-metal joints and are based on 90% of proof load. DO NOT USE for gasket joints or joints of soft materials I.S.O.= International Standardization Organization.

Fastener	Type	Minimum Tensile Strength	Material	PRODUCTION TORQUE GUIDE
				Body size of Outside Diameter
				2	3	4	5	6	8	10	1/4	5/16	3/8	7/16	1/2	9/16	5/8	3/4	7/8	1	1-1/8	1-1/4	1-3/8	1-1/2
	S.A.E 2 Steel	74000 P.S.I	Low Carbon								6	12	20	32	47	69	96	155	206	310	480	675	900	1100
	S.A.E. 5 Steel	120000 P.S.I	Medium Carbon Heat Treat								10	19	33	54	78	114	154	257	382	587	794	1105	1500	1775
	S.A.E. 7 Steel	133000 P.S.I.	Medium Carbon Alloy								13	25	44	71	110	154	215	360	570	840	1325	1825	2500	3000
	S.A.E. 8 Steel	150000 P.S.I.	Medium Carbon Alloy								14	29	47	78	119	169	230	380	600	900	1430	1975	2650	3200
	Socket Head Cap Screw	160000 P.S.I.	High Carbon Quenched Tempered								16	33	54	84	125	180	250	400	640	970	1520	2850	2130	3450
	Socket Set Screw	212000 P.S.I.	High Carbon Quenched Tempered					9*	16*	30*	70*	140*	18	29	43	63	100	146
	Machine Screw Stainless		18-8	2.6*	4*	5.5*	8*	10*	20*	23*	75*	132*	20	31	43	58	95	130	194	260	400	500		725
	Machine Screw Stainless		316	2.7*	4*	5.7*	8*	10*	22*	25*	80*	140*	22	34	46	60	100	135	210	280	425	515		750
	Machine Screw Yellow Brass	60000 P.S.I.	CU 63 ZN 37	2*	3.3*	4.4*	6.4*	8*	16*	20*	65*	110*	17	27	37	49	78	104	160	215	325	400		595
	Silicone Bronze Type "B"	70000 P.S.I.	CU 96 ZNI-5 Min.	2.3*	3.7*	4.9*	7.2*	10*	19*	22*	70*	125*	20	30	41	53	88	117	180	250	365	450		655
	Machine Screw Aluminum	55000 P.S.I.	CU 3.8-4.9 1.2-1.8 MN .3-.9	1.4*	2.1*	2.9*	4.3*	5.4*	12*	15*	46*	82*	13	20	27	36	62	83	128	170	255	315		460
	Machine Screw Monel	82000 P.S.I.	NI 67 CU 30 FE 1.4	2.5*	4*	5.5*	8*	11*	21*	27*	87*	155*	23	36	50	67	115	155	235	315	475	585		850
	Sems Heat Treated Steel	120000 P.S.I.	1018 1022	4*	5*	7*	11*	15*	27*	37*	90*	200*	300*
	Studs	Use SAE 2.5 and 8 values when grade is known, with nut of sufficient strength.											All figures are POUND FEET except those marked with an ASTERISK ( * ) WHICH ARE pound inches. These values are for lubricated fasteners.
	Tapping Screw	Set up joint as it will be in production use 70% of over-torque failure as production specifications.