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Torque vs Tension Bolts Table Chart SAE J429 Bolts

ANSI Hardware Design Data
Torque Design and Applications

The following chart estimates the applied tension clamp force at a defined torque and friction for SAE J429 Grade 2, 5 and 8 bolts.

Nominal Dia. (in.)	Threads per inch		Grade 2			Grade 5				Grade 8
		Clamp Load (Lbs.)	Tightening Torque			Clamp Load (Lbs.)	Tightening Torque			Clamp Load (Lbs.)	Tightening Torque
			K = 0.15	K = 0.18	K = 0.20		K = 0.15	K = 0.18	K = 0.20		K = 0.15	K = 0.18	K = 0.20
Unified Coarse Thread Series
1/4	20	1313	49 in-lbs	59 in-lbs	66 in-lbs	2029	76 in-lbs	91 in-lbs	101 in-lbs	2864	107 in-lbs	129 in-lbs	143 inlbs
5/16	18	2163	101	122	135	3342	157	188	209	4719	221	265	295
3/8	16	3196	15 ft-lbs	18 ft-lbs	20 ft-lbs	4940	23 ft-lbs	28 ft-lbs	31 ft-lbs	6974	33 ft-lbs	39 ft-lbs	44 ft-lbs
7/16	14	4385	24	29	32	6777	37	44	49	9568	52	63	70
1/2	13	5853	37	44	49	9046	57	68	75	12771	80	96	106
5/8	11	9323	73	87	97	14408	113	135	150	20340	159	191	212
3/4	10	13797	129	155	172	21322	200	240	267	30101	282	339	376
7/8	9	11428	125	150	167	29436	322	386	429	41556	455	545	606
1	8	14992	187	225	250	38616	483	579	644	54517	681	818	909
Fine Thread Series
1/4	28	1500	56 in-lbs	68 in-lbs	75 in-lbs	2319	87 in-lbs	104 in-lbs	116 in-lbs	3274	123 in-lbs	147 in-lbs	164 inlbs
5/16	24	2395	112	135	150	3702	174	208	231	5226	245	294	327
3/8	24	3623	17 ft-lbs	20 ft-lbs	23 ft-lbs	5599	26 ft-lbs	31 ft-lbs	35 ft-lbs	7905	37 ft-lbs	44 ft-lbs	49 ft-lbs
7/16	20	4897	27	32	36	7568	41	50	55	10684	58	70	78
1/2	20	6598	41	49	55	10197	64	76	85	14396	90	108	120
5/8	18	10558	82	99	110	16317	127	153	170	23036	180	216	240
3/4	16	15385	144	173	192	23776	223	267	297	33566	315	378	420
7/8	14	12609	138	165	184	32479	355	426	474	45853	502	602	669
1	14 (UNS)	16827	210	252	280	43343	542	650	722	61190	765	918	1020

Notes:

Clamp load estimated as 75% of proof load for specified bolts. Torque values for ¼ and 5/16-inch series are in inch-pounds. All other torque values are in foot-pounds. Torque values calculated from formula T = KDF

Where:

D is the nominal diameter,
F is the clamp load
K=0.15 for “lubricated” conditions
K=0.18 for zinc plated and dry conditions
K=0.20 for plain and dry conditions

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• Fastener and Screw Torque Design and Equation and Calculator | Engineers Edge
• Calculating Assembly Torque per ISO 68 & ISO 724
• Threaded Hole Fastener Pullout Stress
• Torque Wrench Adapter Reduced Arm Calculation
• Torque Wrench Adapter Extended Calculation
• Torque Design Guidelines
• Torque Conversion