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Carbon Steel Lock Washer Torque Reference

Torque reference

Yougu carbon steel washers and 4.8 grade bolts

Washer Size	Bolt Size	Pitch [mm]	Lubricating oil GF = 75% Μth = 0.10, Μh = 0.16		Cu/C Lubricating grease *, GF=75% Μth = 0.11, Μh = 0.16		Dry condition GF=62% Μth = 0.15, Μh = 0.18
Washer Size	Bolt Size	Pitch [mm]	Torque [Nm]	Clamping Force Load[kN]	Torque [Nm]	Clamping Force Load[kN]	Torque [Nm]	Clamping Force Load [kN]
YL3	M3	0.50	0.7	1.2	0.8	1.2	0.7	1.0
YL4	M4	0.70	1.5	2.1	1.8	2.1	1.5	1.7
YL5	M5	0.80	3.0	3.4	3.6	3.4	3.0	2.8
YL6	M6	1.00	5.2	4.8	6.2	4.8	5.3	4.0
YL8	M8	1.25	12.5	8.8	15.0	8.8	12.6	7.3
YL10	M10	1.50	25.0	14.0	29.0	14.0	25.0	12.0
YL12	M12	1.75	42.0	20.0	48.0	20.0	43.0	17.0
YL14	M14	2.00	68.0	28.0	71.0	28.0	68.0	23.0
YL16	M16	2.00	103.0	38.0	120.0	38.0	104.0	31.0
YL18	M18	2.50	144.0	46.0	167.0	46.0	146.0	38.0
YL20	M20	2.50	201.0	59.0	213.0	59.0	204.0	49.0
YL22	M22	2.50	266.0	69.0	280.0	69.0	268.0	57.0
YL24	M24	3.00	346.0	85.0	366.0	85.0	351.0	70.0
YL27	M27	3.00	505.0	110.0	534.0	110.0	514.0	91.0
YL30	M30	3.50	690.0	135.0	729.0	135.0	700.0	111.0
YL33	M33	3.50	927.0	167.0	982.0	167.0	944.0	138.0
YL36	M36	4.00	1197.0	196.0	1267.0	196.0	1218.0	162.0
YL39	M39	4.00	1543.0	234.0	1635.0	234.0	1573.0	194.0
YL42	M42	4.50	1941.0	276.0	2058.0	276.0	1982.0	228.0

Yougu carbon steel washers and 8.8 grade bolts

Washer Size	Bolt Size	Pitch [mm]	Lubricating oil GF = 75% Μth = 0.15, Μh = 0.19		Cu/C Lubricating grease *, GF=75% Μth = 0.13, Μh = 0.18		Dry condition GF=62% Μth = 0.18, Μh = 0.2
Washer Size	Bolt Size	Pitch [mm]	Torque [Nm]	Clamping Force Load[kN]	Torque [Nm]	Clamping Force Load[kN]	Torque [Nm]	Clamping Force Load[kN]
YL3	M3	0.50	1.7	2.4	1.5	2.4	1.5	2.0
YL4	M4	0.70	3.8	4.2	3.6	4.2	3.5	3.5
YL5	M5	0.80	7.5	6.8	6.9	6.8	6.8	5.6
YL6	M6	1.00	13.0	9.7	12.1	9.7	12.0	8.0
YL8	M8	1.25	32.0	18.0	29.0	18.0	29.0	15.0
YL10	M10	1.50	62.0	28.0	57.0	28.0	56.0	23.0
YL12	M12	1.75	107.0	40.0	99.0	40.0	97.0	33.0
YL14	M14	2.00	170.0	55.0	157.0	55.0	155.0	46.0
YL16	M16	2.00	260.0	75.0	240.0	75.0	237.0	62.0
YL18	M18	2.50	364.0	92.0	336.0	92.0	331.0	76.0
YL20	M20	2.50	510.0	118.0	470.0	118.0	464.0	97.0
YL22	M22	2.50	696.0	146.0	642.0	146.0	634.0	120.0
YL24	M24	3.00	878.0	169.0	809.0	169.0	800.0	140.0
YL27	M27	3.00	1284.0	221.0	1183.0	221.0	1172.0	182.0
YL30	M30	3.50	1750.0	269.0	1613.0	269.0	1596.0	222.0
YL33	M33	3.50	2360.0	333.0	2173.0	333.0	2155.0	275.0
YL36	M36	4.00	3043.0	392.0	2803.0	392.0	2776.0	324.0
YL39	M39	4.00	3931.0	468.0	3619.0	468.0	3589.0	387.0
YL42	M42	4.50	4860.0	538.0	4476.0	538.0	4436.0	445.0

Yougu carbon steel washers and 10.9 grade bolts

Washer Size	Bolt Size	Pitch [mm]	Lubricating oil GF = 71% µth=0.15, µh=0.13		Cu/C Lubricating grease*, GF=75% µth=0.13, µh=0.14
Washer Size	Bolt Size	Pitch [mm]	Torque [Nm]	Torque [Nm]	Torque [Nm]	Clamping Force Load[kN]
YL3	M3	0.50	2.0	3.2	2.0	3.4
YL4	M4	0.70	4.5	5.6	4.5	5.9
YL5	M5	0.80	8.9	9.1	8.9	9.6
YL6	M6	1.00	15.5	12.9	15.5	13.6
YL8	M8	1.25	37.0	23.0	37.0	25.0
YL10	M10	1.50	73.0	37.0	73.0	39.0
YL12	M12	1.75	126.0	54.0	126.0	57.0
YL14	M14	2.00	201.0	74.0	201.0	78.0
YL16	M16	2.00	307.0	100.0	306.0	106.0
YL18	M18	2.50	430.0	123.0	429.0	130.0
YL20	M20	2.50	602.0	156.0	600.0	165.0
YL22	M22	2.50	821.0	194.0	818.0	205.0
YL24	M24	3.00	1036.0	225.0	1034.0	238.0
YL27	M27	3.00	1514.0	294.0	1509.0	310.0
YL30	M30	3.50	2064.0	358.0	2058.0	378.0
YL33	M33	3.50	2782.0	443.0	2772.0	468.0
YL36	M36	4.00	3589.0	522.0	3576.0	551.0
YL39	M39	4.00	4632.0	624.0	4613.0	659.0
YL42	M42	4.50	5731.0	716.0	5709.0	757.0

Yougu carbon steel washers and 12.9 grade bolts

Washer Size	Bolt Size	Pitch [mm]	Lubricating oil GF = 71% µth=0.15, µh=0.13		Cu/C Lubricating grease*, GF=75% µth=0.13, µh=0.14
Washer Size	Bolt Size	Pitch [mm]	Torque [Nm]	Clamping load [kN]	Torque [Nm]	Clamping Force Load[kN]
YL3	M3	0.50	2.2	3.9	2.3	4.1
YL4	M4	0.70	5.1	6.7	5.3	7.1
YL5	M5	0.80	10.0	10.9	10.3	11.5
YL6	M6	1.00	17.4	15.4	18.0	16.3
YL8	M8	1.25	42.0	28.0	43.0	30.0
YL10	M10	1.50	82.0	44.0	85.0	47.0
YL12	M12	1.75	142.0	65.0	146.0	68.0
YL14	M14	2.00	226.0	89.0	233.0	94.0
YL16	M16	2.00	345.0	120.0	355.0	127.0
YL18	M18	2.50	483.0	148.0	498.0	156.0
YL20	M20	2.50	676.0	188.0	696.0	198.0
YL22	M22	2.50	921.0	233.0	948.0	246.0
YL24	M24	3.00	1165.0	270.0	1199.0	286.0
YL27	M27	3.00	1700.0	352.0	1749.0	372.0
YL30	M30	3.50	2316.0	430.0	2386.0	454.0
YL33	M33	3.50	3124.0	532.0	3213.0	562.0
YL36	M36	4.00	4029.0	626.0	4145.0	662.0
YL39	M39	4.00	5199.0	748.0	5346.0	790.0
YL42	M42	4.50	6434.0	860.0	6617.0	908.0

µh = Friction coefficient under the bolt head 1 N = 0.225 Ib 1 Nm = 0.738 ft-Ib

None

Stainless Steel Lock Washer Torque Reference

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