Duplex Steel Fasteners

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Duplex steel fasteners are known for their high strength, and corrosion resistance. They blend the properties of both austenitic and ferritic stainless steels making them suited for harsh circumstances. Metracore Alloys is a leading manufacturer and supplies a wide range of duplex fasteners in different grades and types. We offer duplex steel bolts, nuts, lug nuts, acorn lug nuts, steel washers, and steel screws. As a trusted supplier of duplex fasteners, we offer dependable solutions that are built to last.

Duplex Steel Fasteners, Duplex Fasteners, Duplex Stainless Steel Fasteners, Duplex Steel Bolts, Duplex Bolts, Duplex Nuts, Duplex Lug Nuts

Duplex steel fasteners are available in different sizes and finishes to match varied industry needs. They offer excellent resistance to stress cracking, fatigue and wear. Their parameters guarantee excellent tensile strength and extended service life. Our duplex stainless steel fasteners can withstand high pressure and temperatures with ease. The balance of strength and toughness makes it suitable for both structural and mechanical uses.

The demand for duplex fasteners is high in industries where safety and reliability are critical. They are most often used in marine, chemical, oil and gas, and construction projects. In offshore platforms and pipelines, duplex steel bolts and duplex nuts provide long-lasting performance against saltwater and chemicals. We manufacture these fasteners using controlled forging, machining and heat treatment to maintain accuracy and strength.

Duplex Acorn Lug Nuts, Duplex Steel Washers, Duplex Steel Screws, Duplex Fasteners Suppliers, Duplex Steel Fasteners Manufacturers

All of our duplex steel fasteners meet worldwide quality and safety standards. We have certifications that demonstrate thorough testing and inspection methods. Products are packed carefully using wooden boxes, cartons, and protective materials to prevent damage during transit. With a strong reputation as a duplex steel fastener manufacturer, we ensure every order of duplex fasteners reaches customers in perfect condition.

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Duplex Steel Fasteners Specification

Types of Duplex Steel Fasteners

Reach out to Metracore Alloys for reliable Duplex Steel Fasteners solutions

Technical Details of Duplex Steel Fasteners

Dimensions of Duplex Steel Bolts Fasteners

Nominal Size Of D	Diameter Of Body		ASTM A193 Head Thickness		ASTM A193 Flats Acro		ASTM A193 Corners Acro
	D (MAXIMUM)	D (MINIMUM)	H (MAXIMUM)	H (MINIMUM)	F (MAXIMUM)	F (MINIMUM)	C (MAXIMUM)	C (MINIMUM)
m10	10.00	9.78	6.63	6.17	17.00	15.73	18.48	17.77
m12	12.00	11.73	7.76	4.24	19.00	17.73	20.78	20.03
m14	14.00	13.73	9.09	8.51	22.00	20.67	24.25	23.35
m16	16.00	15.73	10.32	9.68	24.00	23.67	27.71	26.75
m20	20.00	19.67	12.88	12.12	30.00	29.16	34.64	32.95
m24	24.00	23.67	15.44	14.56	36.00	35.00	41.57	39.55
m30	30.00	29.67	19.48	17.92	46.00	45.00	53.12	50.85
m36	36.00	35.61	23.38	21.63	55.00	53.80	63.51	60.79
m42	42.00	41.38	26.97	25.03	65.00	62.90	75.06	71.71
m48	48.00	47.38	31.07	28.93	75.00	72.60	86.60	82.76
m56	56.00	55.26	36.2	33.80	85.00	82.20	98.15	93.71
m64	64.00	63.26	41.32	38.68	95.00	91.80	109.70	104.65
m72	72.00	71.26	46.45	43.55	105.00	101.40	121.24	115.60
m80	80.00	79.26	51.58	48.42	115.00	111.00	132.72	126.54
m90	90.00	89.13	57.74	54.26	130.00	125.50	150.11	143.07
m100	90.00	99.13	63.9	60.10	145.00	140.00	167.43	159.60

Duplex Steel Nuts Fasteners Dimensions

Nominal Size Of Thread Diameter		F			G		H
		Across Flats Width			Across Corners Width		Thickness Row
		Basic	Maximum	Minimum	Maximum	Minimum	Basic	Maximum	Minimum
1/4	.2500	7/16	.438	.428	.505	.488	7/32	.226	.212
5/16	.3125	1/2	.500	.489	.577	.557	17/64	.273	.258
3/8	.3750	9/16	.562	.551	.650	.628	21/64	.337	.479
7/16	.4375	11/16	.688	.675	.794	.768	3/8	.385	.365
1/2	.5000	3/4	.750	.736	.866	.840	7/16	.448	.427
9/16	.5625	7/8	.875	.861	1.010	.982	31/64	.496	.473
5/8	.6250	15/16	.938	.922	1.083	1.051	35/64	.559	.535
3/4	.7500	1-1/8	1.125	1.088	1.299	1.240	41/64	.665	.617
7/8	.8750	1-5/16	1.312	1.269	1.516	1.447	3/4	.776	.724
1	1.0000	1-1/2	1.500	1.450	1.732	1.653	55/64	.887	.831
1-1/8	1.1250	1-11/16	1.688	1.631	1.949	1.859	31/32	.999	.939
1-3/8	1.3750	2-1/16	2.062	1.994	2.382	2.273	1-11/64	1.206	1.138
1-1/2	1.500	2-1/4	2.250	2.175	2.598	2.480	1-9/32	1.ASTM A194 GR. 8	1.245
1-5/8	1.6250	2-7/16	2.438	2.356	2.815	2.686	1-25/64	1.429	1.353
1-3/4	1.7500	2-5/8	2.625	2.538	3.031	2.893	1-1/2	1.540	1.460
2	2.0000	3	3.000	2.900	3.464	3.306	1-23/32	1.763	1.675
2-1/4	2.2500	3-3/8	3.375	3.263	3.897	3.719	1-15/16	1.986	1.890
2-1/2	2.5000	3-3/4	3.750	3.625	4.330	4.133	2-5/32	2.209	2.105
2-3/4	2.7500	4-1/8	4.125	3.988	4.763	4.546	2-3/8	2.431	2.319

Duplex Steel Flat Washers Fasteners Dimensions

Bolt Size	USS			SAE
Bolt Size	ID (in.)	OD (in.)	Thickness	ID (in.)	OD (in.)	Thickness
5/32 (#8)	–	–	–	0.188	0.438	.036/.065
1/8 (#6)	–	–	–	0.156	0.375	.036/.065
7/32 (#12)	–	–	–	0.250	0.562	.051/.080
3/16 (#10)	0.250	0.560	.036/.065	0.220	0.500	.036/.065
1/4 (#14)	0.312	0.734	.051/.080	0.281	0.625	.051/.080
3/8	0.438	1.000	.064/.104	0.406	0.812	.051/.080
5/16	0.375	0.875	.064/.104	0.344	0.688	.051/.080
7/16	0.500	1.250	.064/.104	0.469	0.922	.051/.080
9/16	0.625	1.469	.086/.132	0.594	1.156	.074/.121
1/2	0.562	1.375	.086/.132	0.531	1.062	.074/.121
5/8	0.688	1.750	.108/.160	0.656	1.312	.074/.121
7/8	0.938	2.250	.136/.192	0.938	1.750	.108/.160
3/4	0.812	2.000	.122/.177	0.812	1.469	.108/.160
1	1.062	2.500	.136/.192	1.062	2.000	.108/.160
1 1/4	1.375	3.000	.136/.192	1.375	2.500	.136/.192
1 1/8	1.250	2.750	.136/.192	1.250	2.250	.108/.160
1 3/8	1.500	3.250	.153/.213	1.500	2.750	.136/.213
3	3.125	5.500	.249/.327	–	–	–
1 5/8	1.750	3.750	.153/.213	–	–	–
1 1/2	1.625	3.500	.153/.213	1.625	3.000	.153/.213
1 3/4	1.875	4.000	.153/.213	–	–	–
2	2.125	4.500	.153/.213	–	–	–
1 7/8	2.000	4.250	.153/.213	–	–	–
2 1/2	2.625	5.000	.210/.280	–	–	–
2 1/4	2.375	4.750	.320/.248	–	–	–
2 3/4	2.875	5.250	.228/.410S	–	–	–

Weight Chart Of Duplex Steel Fasteners

APPROX WEIGHT IN K.G. PER 1000 PIECE
Size	M10	M12	M16	M18	M20	M22	M24	M27	M30	M33	M36	M39	M42	M45	M48	M52	M56	M60	M64	M72
50	40.60	57.02	107.00	139.00	178.25	222.00	265.00	390.00	513.25	648.00	795.00	–	–	–	–	–	–	–	–	–
55	43.70	61.42	114.00	147.00	188.50	235.00	283.00	410.00	538.50	676.00	835.00	–	–	–	–	–	–	–	–	–
60	46.80	65.82	121.00	155.00	198.75	248.00	301.00	430.00	563.75	704.00	875.00	1087.00	–	–	–	–	–	–	–	–
65	49.90	70.22	128.00	163.00	209.00	261.00	319.00	450.00	589.00	732.00	915.00	1134.00	–	–	–	–	–	–	–	–
70	53.00	74.62	136.00	171.00	219.25	274.00	337.00	470.00	614.25	760.00	955.00	1181.00	1390.00	–	–	–	–	–	–	–
75	56.10	79.02	144.00	179.00	229.50	287.00	355.00	490.00	639.50	788.00	995.00	1228.00	1445.00	–	–	–	–	–	–	–
80	59.20	83.42	152.00	187.00	239.75	300.00	373.00	510.00	664.75	821.00	1035.00	1275.00	1500.00	1900.00	–	–	–	–	–	–
85	62.30	87.82	160.00	195.00	250.00	313.00	391.00	531.00	690.00	854.00	1075.00	1322.00	1555.00	1945.00	–	–	–	–	–	–
90	65.40	92.22	168.00	203.00	260.25	326.00	409.00	552.00	716.50	887.00	1115.00	1369.00	1610.00	1990.00	2220.00	–	–	–	–	–
95	68.50	96.62	176.00	211.00	270.50	339.00	427.00	573.00	743.00	920.00	1155.00	1416.00	1665.00	2035.00	2290.00	–	–	–	–	–
100	71.60	101.02	184.00	219.00	280.75	352.00	445.00	594.00	769.50	953.00	1195.00	1463.00	1720.00	2080.00	2360.00	2640.00	3400.00	–	–	–
110	77.80	110.00	200.00	237.00	301.25	377.00	481.00	636.00	824.75	1023.00	1250.00	1530.00	1824.00	2170.00	2500.00	2810.00	3590.00	4240.00	4910.00	–
120	84.00	119.00	216.00	253.00	321.75	402.00	517.00	678.00	880.00	1093.00	1330.00	1620.00	1928.00	2260.00	2640.00	2980.00	3780.00	4460.00	5160.00	6820.00
130	90.20	127.80	232.00	269.00	342.25	427.00	553.00	720.00	935.25	1163.00	1410.00	1710.00	2032.00	2350.00	2780.00	3150.00	3970.00	4680.00	5410.00	7130.00
140	96.40	136.60	248.00	285.00	362.75	452.00	589.00	762.00	990.25	1233.00	1490.00	1800.00	2136.00	2440.00	2920.00	3320.00	4160.00	4900.00	5660.00	7440.00
150	102.60	145.40	264.00	301.00	383.25	477.00	625.00	804.00	1045.75	1303.00	1570.00	1890.00	2240.00	2530.00	3060.00	3490.00	4350.00	5120.00	5910.00	7750.00
160	108.80	154.20	280.00	317.00	403.75	502.00	661.00	846.00	1101.00	1373.00	1650.00	1980.00	2344.00	2620.00	3200.00	3660.00	4540.00	5340.00	6160.00	8060.00
170	115.00	163.00	296.00	333.00	424.25	527.00	697.00	888.00	1156.25	1443.00	1730.00	2070.00	2448.00	2710.00	3340.00	3830.00	4730.00	5560.00	6410.00	8370.00
180	121.20	172.00	312.00	349.00	444.75	552.00	733.00	930.00	1211.50	1513.00	1810.00	2160.00	2552.00	2800.00	3480.00	4000.00	4920.00	5780.00	6660.00	8680.00
190	127.40	181.00	328.00	365.00	465.25	577.00	769.00	972.00	1266.75	1583.00	1890.00	2250.00	2656.00	2890.00	3620.00	4170.00	5110.00	6000.00	6910.00	8990.00
200	133.60	190.00	344.00	381.00	485.75	602.00	805.00	1014.00	1322.00	1653.00	1970.00	2340.00	2760.00	2980.00	3760.00	4340.00	5300.00	6220.00	7160.00	9300.00
210	139.80	199.00	360.00	397.00	506.25	627.00	841.00	1056.00	1377.25	1723.00	2050.00	2430.00	2864.00	3070.00	3900.00	4510.00	5490.00	6440.00	7410.00	9610.00
220	146.00	208.00	376.00	413.00	526.75	652.00	877.00	1098.00	1432.50	1793.00	2130.00	2520.00	2968.00	3160.00	4040.00	4680.00	5680.00	6660.00	7660.00	9920.00
230	152.20	217.00	392.00	429.00	547.25	677.00	913.00	1140.00	1487.75	1863.00	2210.00	2610.00	3072.00	3250.00	4180.00	4850.00	5870.00	6880.00	7910.00	10230.00
240	158.40	226.00	408.00	445.00	567.75	702.00	949.00	1182.00	1543.00	1933.00	2290.00	2700.00	3176.00	3340.00	4320.00	5020.00	6060.00	7100.00	8160.00	10540.00
250	164.60	235.00	424.00	461.00	588.25	727.00	985.00	1224.00	1598.25	2003.00	2370.00	2790.00	3280.00	3430.00	4460.00	5190.00	6250.00	7320.00	8410.00	10850.00
260	170.80	244.00	440.00	477.00	608.75	752.00	1021.00	1266.00	1653.50	2073.00	2450.00	2880.00	3384.00	3520.00	4600.00	5360.00	6440.00	7540.00	8660.00	11160.00
270	177.00	253.00	456.00	493.00	629.25	777.00	1057.00	1308.00	1708.75	2143.00	2530.00	2970.00	3488.00	3610.00	4740.00	5530.00	6630.00	7760.00	8910.00	11470.00
280	183.20	262.00	472.00	509.00	649.75	802.00	1093.00	1350.00	1764.00	2213.00	2610.00	3060.00	3592.00	3700.00	4880.00	5700.00	6820.00	7980.00	9160.00	11780.00
290	189.40	271.00	488.00	525.00	670.25	827.00	1129.00	1392.00	1819.25	2283.00	2690.00	3150.00	3696.00	3790.00	5020.00	5870.00	7010.00	8200.00	9410.00	12090.00
300	195.60	280.00	504.00	541.00	690.75	852.00	1165.00	1434.00	1874.50	2353.00	2770.00	3240.00	3800.00	3880.00	5160.00	6040.00	7200.00	8420.00	9660.00	12400.00
310	201.80	289.00	520.00	557.00	711.25	877.00	1201.00	1476.00	1929.75	2423.00	2850.00	3330.00	3904.00	3970.00	5300.00	6210.00	7390.00	8640.00	9910.00	12710.00
320	208.00	298.00	536.00	573.00	731.75	902.00	1237.00	1518.00	1985.00	2493.00	2930.00	3420.00	4008.00	4060.00	5440.00	6380.00	7580.00	8860.00	10160.00	13020.00
330	214.20	307.00	552.00	589.00	752.25	927.00	1273.00	1560.00	2040.25	2563.00	3010.00	3510.00	4112.00	4150.00	5580.00	6550.00	7770.00	9080.00	10410.00	13330.00
340	220.40	316.00	568.00	605.00	772.75	952.00	1309.00	1602.00	2095.50	2633.00	3090.00	3600.00	4216.00	4240.00	5720.00	6720.00	7960.00	9300.00	10660.00	13640.00
350	226.60	325.00	584.00	621.00	793.25	977.00	1345.00	1644.00	2150.75	2703.00	3170.00	3690.00	4320.00	4330.00	5860.00	6890.00	8150.00	9520.00	10910.00	13950.00
360	232.80	334.00	600.00	637.00	813.75	1002.00	1381.00	1686.00	2206.00	2773.00	3250.00	3780.00	4424.00	4420.00	6000.00	7060.00	8340.00	9740.00	11160.00	14260.00
370	239.00	343.00	616.00	653.00	834.25	1027.00	1417.00	1728.00	2261.25	2843.00	3330.00	3870.00	4528.00	4510.00	6140.00	7230.00	8530.00	9960.00	11410.00	14570.00
380	245.20	352.00	632.00	669.00	854.75	1052.00	1453.00	1770.00	2316.50	2913.00	3410.00	3960.00	4632.00	4600.00	6280.00	7400.00	8720.00	10180.00	11660.00	14880.00
390	251.40	361.00	648.00	685.00	875.25	1077.00	1489.00	1812.00	2371.75	2983.00	3490.00	4050.00	4736.00	4690.00	6420.00	7570.00	8910.00	10400.00	11910.00	15190.00
400	257.60	370.00	664.00	701.00	895.75	1102.00	1525.00	1854.00	2427.00	3053.00	3570.00	4140.00	4840.00	4780.00	6560.00	7740.00	9100.00	10620.00	12160.00	15500.00

Manufacturing Process of Duplex Steel Fasteners

Duplex Steel Fasteners Application

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