ASTM A320 Grade L7 Fasteners

What is ASTM A320 Grade L7 Fasteners

The ASTM A320 Grade L7 Fasteners have characteristics that are similar to the stainless steel types such as both the austenitic along with the ferritic. These fasteners are widely used in cryogenic applications where the temperature could go below -150 degree fahrenheit. Therefore, these ASTM A320 Grade L7 Fasteners are used in a large variety of applications where the temperature could not be favorable

The chemical composition of these ASTM A320 Grade L7 Fasteners have properties that make them mechanically strong. These fasteners are also resistant towards corrosion. They also have the characteristics of being strong as well as hard. Because of it being resistant towards the temperatures, Corrosion as well as having good tensile strength they are used in a large amount of industrial applications.

ASTM A320 Grade L7 Socket Head Cap Bolts, ASTM A320 Grade L7 U-Bolts Dealer in Mumbai, ASTM A320 Grade L7 Heavy Hex Bolts Supplier, ASTM A320 Grade L7 60000 PSI Tensile Strength Bolts Exporter, ASTM A320 Grade L7 Bolts Manufacturer in India.

Sumit Impex is a well known manufacturer of ASTM A320 Grade L7 Fasteners. They follow all the industrial standards and guidelines along with the rules and regulations that are required in order to produce a high quality product. The chemical composition contains nickel along with chromium as well as titanium and vanadium. These make them resistant towards acidic corrosion.

These ASTM A320 Grade L7 Fasteners could be available in different shapes, sizes as well as dimensions depending upon the users specifications and needs as well as the requirement of the product. Because of all the properties that these ASTM A320 Grade L7 Fasteners have, they are used in a large number of industrial applications such as marine engineering, oil and gas industries, etc.

Specification:- ASTM A320 Grade L7 Fasteners

SpecificationsASTM A 193 / ASME SA 193
StandardDIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
SizeM3 - M100 | 3/6″ - 4″ | Custom Sizes
Fasteners Length3 mm - 200 mm | Custom Sizes
Nuts SizeM3 - M56 | 3/6" to 2" | Custom Sizes
Washers SizeM3 - M56 | 3/6" to 2" | Custom Sizes
DimensionsDIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Threads availableUNF, BSW, BSF, METRIC, UNC, or as required
Threads ConfigurationASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
FormHex, Threading, Square, Round as per Gauge Etc.
HeadHex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
Neck typeHex, Square, Triangular, Oval & Knurled etc.
Surface CoatingBlack Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request
Manufacturing ProcessWire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing.

Chemical Composition:- ASTM A320 Grade L7 Fasteners

ElementL7 (AISI 4140)L43 (AISI 4340)B8 (AISI 304)B8M (AISI 316)
Carbon0.37 – 0.49%0.38 – 0.43%0.08% max0.08% max
Manganese0.65 – 1.10%0.75 – 1.00%2.00% max2.00% max
Phosphorus, max0.04%0.04%0.05%0.05%
Sulfur, max0.04%0.04%0.03%0.03%
Silicon0.15 – 0.35%0.15 – 0.35%1.00% max1.00% max
Chromium0.75 – 1.20%0.70 – 0.90%18.0 – 20.0%16.0 – 18.0%
Nickel1.65 – 2.00%8.0 – 11.0%10.0 – 14.0%
Molybdenum0.15 – 0.25%0.20 – 0.30%2.00 – 3.00%

Mechanical Properties:- ASTM A320 Grade L7 Fasteners

GradeSizeTensile, ksi minYield, ksi, minCharpy ImpactElong, % minRA, %, min
L7up to 21/2125105-150° F1650
L43sup a 4125105-150° F1650
B8 Class 1all7530N/A3050
B8M Class 1all7530N/A3050
B8 Class 2Up to 3/4125100N/A1235
7/8 – 111580N/A1535
11/8 – 11/410565N/A2035
13/8 – 11/210050N/A2845
B8M Class 2Up to 3/411095N/A1545
7/8 – 110080N/A2045
11/8 – 11/49565N/A2545
13/8 – 11/29050N/A

Dimensions:- ASTM A320 Grade L7 Fasteners

Bolts Dimensions

Nominal Size or Basic Product DiameterFull-Size Body Diameter, EWidth Across Flats, FWidth Across Corners, GHead Height, H BasicRadius of Fillet, RNominal Thread Length for Bolt Lengths, LT
inchmmMaxMinBasic inchMaxMinMaxMinBasic inchMaxMinMaxMin6 in. and ShoterOver 6 in.
1⁄40.250.260.2377⁄160.4380.4250.5050.48411⁄640.1880.150.030.010.751
5⁄160.31250.3240.2981⁄20.50.4840.5770.5527⁄320.2350.1950.030.010.8751.125
3⁄80.3750.3880.369⁄160.5620.5440.650.621⁄40.2680.2260.030.0111.25
7⁄160.43750.4520.4215⁄80.6250.6030.7220.68719⁄640.3160.2720.030.011.1251.375
1⁄20.50.5150.4823⁄40.750.7250.8660.82611⁄320.3640.3020.030.011.251.5
5⁄80.6250.6420.60515⁄160.9380.9061.0831.03327⁄640.4440.3780.060.021.51.75
3⁄40.750.7680.72911⁄81.1251.0881.2991.241⁄20.5240.4550.060.021.752
7⁄80.8750.8950.8521 5⁄161.3121.2691.5161.44737⁄640.6040.5310.060.0222.25
111.0220.9761 1⁄21.51.451.7321.65343⁄640.70.5910.090.032.252.5
1 1⁄81.1251.1491.0981 11⁄161.6881.6311.9491.8593⁄40.780.6580.090.032.52.75
1 1⁄41.251.2771.2231 7⁄81.8751.8122.1652.06627⁄320.8760.7490.090.032.753
1 3⁄81.3751.4041.3452 1⁄162.0621.9942.3822.27329⁄320.940.810.090.0333.25
1 1⁄21.51.5311.472 1⁄42.252.1752.5982.4811.0360.9020.090.033.253.5
1 5⁄81.6251.6581.5912 7⁄162.4382.3562.8152.6161 3⁄321.1160.9780.090.033.53.75
1 3⁄41.751.7851.7162 5⁄82.6252.5383.0312.8931 5⁄321.1961.0540.120.043.754
1 7⁄81.8751.9121.8392 13⁄162.8122.7193.2483.0991 1⁄41.2761.130.120.0444.25
222.0391.964332.93.4643.3061 11⁄321.3881.1750.120.044.254.5
2 1⁄42.252.3052.2143 3⁄83.3753.2623.8973.7191 1⁄21.5481.3270.190.064.755
2 1⁄22.52.5592.4613 3⁄43.753.6254.334.1331 21⁄321.7081.4790.190.065.255.5
2 3⁄42.752.8272.7114 1⁄84.1253.9884.7634.5461 13⁄161.8691.6320.190.065.756
333.0812.9614 1⁄24.54.355.1964.95922.061.8150.190.066.256.5
3 1⁄43.253.3353.214 7⁄84.8754.7125.6295.3722 3⁄162.2511.9360.190.066.757
3 1⁄23.53.5893.4615 1⁄45.255.0756.0625.7862 5⁄162.382.0570.190.067.257.5
3 3⁄43.753.8583.7265 5⁄85.6255.4376.4956.1982 1⁄22.5722.2410.190.067.758
444.1113.975665.86.9286.6122 11⁄162.7642.4240.190.068.258.5

Stud Bolt Dimensions

Nominal Size Diameter, D inchTap End Full Thread Length, BMUmax = 2PMinimum Nut End Full Thread Length, Bmin
NominalMin.Max.UNC & NC-5 ThreadUNF Thread8UN ThreadL ≤ 1010 < L ≤ 16L > 16
1/40.3750.3500.4000.1000.071...0.7501.0001.500
5/160.4690.4400.4980.1110.083--0.8751.1251.625
3/80.5630.5320.5940.1250.083--1.0001.2501.750
7/160.6560.6200.6920.1430.100--1.1251.3751.875
1/20.7500.7080.7920.1540.100--1.2501.5002.000
9/160.8440.8020.8960.1670.111--1.3751.6252.125
5/80.9380.8920.9830.1820.111--1.5001.7502.250
3/41.1.251.0751.1750.2000.125--1.7502.0002.500
7/81.3131.2581.3680.2220.143--2.0002.2502.750
11.5001.4381.5620.2500.167--2.2502.5003.000
1 1/81.6881.6251.7500.2860.1670.2502.5002.7503.250
1 1/41.8751.8131.9380.2860.1670.2502.7503.0003.500
1 3/82.0632.0002.1250.3330.1670.2503.0003.2503.750
1 1/22.2502.1882.3130.3330.1670.2503.2503.5004.000
1 5/82.4382.3752.500----0.2503.5003.7504.250
1 3/42.6252.5632.6880.400--0.2503.7504.0004.500
1 7/82.8132.7502.875----0.2504.0004.2504.750
23.0002.9253.0750.444--0.2504.2504.5005.000
2 1/43.3753.3003.4500.444--0.2504.7505.0005.500
2 1/23.7503.6753.8250.500--0.2505.2505.5006.000
2 3/44.1254.0504.2000.500--0.2505.7506.0006.500
34.5004.4254.5750.500--0.250--6.5007.000
3 1/44.8754.7754.9750.500--0.250--7.0007.500
3 1/25.2505.1505.3500.500--0.250--7.5008.000
3 3/45.6255.5255.7250.500--0.250--8.0008.500
46.0005.9006.1000.500--0.250--8.5009.000

Nut Dimensions

Nominal Size inchBasic Major Diameter of ThreadWidth Across Flats, FWidth Across Corners, GThickness Heavy Hex Nuts, HThickness Heavy Hex Jam Nuts, H1Maximum Runout of Bearing Surface to Thread Axis, FIM
Heavy HEX NUTSHeavy Hex Jam Nuts
Specified Proof load
Basic inchMin.MaxMin.MaxBasic inchMin.MaxBasic inchMin.MaxUp to 150,000 psi150,000 psi and GreaterAll Strength Levels
1/40.25001/20.4880.5000.5560.57715/640.2180.25011/640.1560.1880.0170.0110.017
5/160.31259/160.5460.5620.6220.65019/640.2800.31413/640.1860.2200.0200.0120.020
3/80.375011/160.6690.6880.7630.79423/640.3410.37715/640.2160.2520.0210.0140.021
7/160.43753/40.7280.7500.8300.86627/640.4030.44117/640.2470.2850.0220.0150.022
1/20.50007/80.8500.8750.9691.01031/640.4640.50419/640.2770.3170.0230.0160.023
9/160.562515/160.9090.9381.0371.08335/640.5260.56821/640.3070.3490.0240.0170.024
5/80.62501 1/161.0311.0621.1751.22739/640.5870.63123/640.3370.3810.0250.0180.025
3/40.75001 1/41.2121.2501.3821.44347/640.7100.75827/640.3980.4460.0270.0200.027
7/80.87501 7/161.3941.4381.5891.66055/640.8330.88531/640.4580.5100.0290.0220.029
11.00001 5/81.5751.6251.7961.87663/640.9561.01235/640.5190.5750.0310.0240.031
1 1/81.12501 13/161.7561.8122.0022.0931 7/641.0791.13939/640.5790.6390.0330.0270.033
1 1/41.250021.9382.0002.2092.3091 7/321.1871.25123/320.6870.7510.0350.0300.035
1 3/81.37502 3/162.1192.1882.4162.5261 11/321.3101.37825/320.7470.8150.0380.0330.038
1 1/21.50002 3/82.3002.3752.6222.7421 15/321.4331.50527/320.8080.8800.0410.0360.041
1 5/81.62502 9/162.4812.5622.8282.9591 19/321.5561.63229/320.8680.9440.0440.0380.044
1 3/41.75002 3/42.6622.7503.0353.1751 23/321.6791.75931/320.9291.0090.0480.0410.048
1 7/81.87502 15/162.8442.9383.2423.3921 27/321.8021.8861 1/320.9891.0730.0510.0440.051
22.00003 1/83.0253.1253.4493.6081 31/321.9252.0131 3/321.0501.1380.0550.0470.055
2 1/42.25003 1/23.3883.5003.8624.0412 13/642.1552.2511 13/641.1551.2510.0610.0520.061
2 1/22.50003 7/83.7503.8754.2754.4742 29/642.4012.5051 29/641.4011.5050.0680.0580.068
2 3/42.75004 1/44.1124.2504.6884.9072 45/642.6472.7591 37/641.5221.6340.0740.0640.074
33.00004 5/84.4754.6255.1025.3402 61/642.8933.0131 45/641.6431.7630.0810.0700.081
3 1/43.250054.8385.0005.5155.7743 3/163.1243.2521 13/161.7481.8760.0870.0750.087
3 1/23.50005 3/85.2005.3755.9286.2073 7/163.3703.5061 15/161.8702.0060.0940.0810.094
3 3/43.75005 3/45.5625.7506.3416.6403 11/163.6163.7602 1/161.9902.1340.1000.0870.100
44.00006 1/85.9256.1256.7557.0733 15/163.8624.0142 3/162.1122.2640.1070.0930.107

Washer Dimensions

Nominal SizeTClipped Width E, Min.
I.D.O.D.StandardExtra Thick
[Note (1)]Max.Min.Max.Min.Max.Min.Max.Min.[Note (2)]
1214.4142725.74.63.110810.5
1618.4183432.44.63.110814
2022.5224240.44.63.110817.5
2224.5244442.44.63.410819.2
2426.5265048.44.63.410821
2730.53056S4.14.63.410823.6
3033.6336058.14.63.410826.2
3639.6397270.14.63.410831.S
4245.6458481.87.24.610836.7
4852.7529592.87.24.610842
5662.762107104.88.76.110849
6470.770118115.88.76.110856
7278.778130127.58.76.110863
8086.986142139.58.76.110870
9096.996159156.58.76.110878.7
100107.9107176173.58.76.110887.5

Weight Chart:- ASTM A320 Grade L7 Fasteners

LENGTHS#2#3#4#5#6#8#10#121/4″5/16″3/8″
1/80.400.550.701.11.4
3/160.500.700.901.21.52.53.9
1/40.600.801.001.41.72.84.35.68.5
5/160.600.901.201.51.93.14.66.19.116.7
3/80.700.901.301.72.13.45.06.59.817.729.2
7/160.801.001.501.92.23.65.46.910.418.830.7
1/20.801.101.602.02.43.95.87.411.119.832.2
9/160.901.201.702.22.64.26.27.811.720.933.6
5/81.001.301.802.32.84.56.68.312.421.935.1
3/41.101.502.102.63.25.07.39.213.624.038.0
7/81.301.702.303.03.55.68.110.114.926.141.0
1″1.401.902.503.43.96.28.911.016.128.844.0
1-1/8″1.502.002.803.84.36.79.611.917.430.247.0
1-1/4″1.602.203.004.14.67.310.412.818.732.349.8
1-1/2″1.802.503.504.75.38.311.914.721.236.555.8
1-3/4″2.102.904.005.36.19.413.516.523.740.761.7
2″2.403.304.506.06.810.615.018.326.244.867.6
2-1/4″2.603.605.006.77.611.816.620.128.819.073.5
2-1/2″2.803.905.507.38.312.918.122.031.353.279.5
2-3/4″3.104.306.007.99.113.919.723.833.957.385.3
3″3.404.706.508.69.815.021.225.636.461.591.3

Different Types :- ASTM A320 Grade L7 Fasteners

Price List:- ASTM A320 Grade L7 Fasteners

  • A320 Grade L7 Fasteners
    US $1000-2500 / Ton
  • ASTM A320 Gr L7 Square Bolts
    US $2000-3000 / Ton
  • ASTM A320 Gr L7 Heavy Hex Bolts Exporter
    US $1.5-4.5 / Kilogram
  • ASTM A320 Gr L7 Hex Headed Bolts
    US $1800-2300 / Ton
  • ASTM A320 Grade L7 Structural Bolts
    US $1550-2400 / Ton
  • ASTM A320 Grade L7 U-Bolts Stockist
    US $1800-2300 / Ton
  • A320 Grade L7 Alloy Steel Carriage Bolts
    US $1300-2600 / Metric Ton

Application Industries

These material are not a single material but the name for a family of corrosion resistant steels. Like many scientific breakthrough the origins of stainless steel lies in a lucky accident. From the smallest part of zipper to the largest building skyscraper, stainless steel is an essential part of modern life.Stainless steel’s strength, resistance to corrosion and low maintenance make it the ideal material for a wide range of applications. It is also has a long life cycle and is 100% recyclable.

Packaging Industries

We Sumit Impex Metal Ensure the Best Quality of Packing, Because It Plays an Important Role Especially in the Case of International Shipments in Which Consignment Passes Through Various Channels to Reach the Ultimate Destination, So We Put Extraordinary Concern Regarding Packaging.

We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,

Testings (Destructive, Non Destructive)

City We Deliver:-

New York, Bhopal, Howrah, Coimbatore, Chennai, Edmonton, Los Angeles, Rajkot, Mumbai, Sharjah, Cairo, Seoul, London, Jakarta, Abu Dhabi, Dammam, Nashik, Dubai, Hyderabad, Houston, Manama, Calgary, Granada, Rio de Janeiro, Navi Mumbai, Al Khobar,Kanpur, Hong Kong, Nagpur, Hanoi, Chandigarh, La Victoria, Kuala Lumpur, Bogota, Visakhapatnam.

Countries We Export:-

Spain, Trinidad & Tobago, South Africa, Costa Rica, Netherlands, Colombia, Tibet, Afghanistan, Greece, Mongolia, Austria, United Arab Emirates, Angola, India, Jordan, Chile, Mexico, Namibia, Japan, Israel, Macau, Argentina, Ghana, Kuwait, Ecuador, Switzerland, Nigeria, Ukraine, Bulgaria, Poland, South Korea, Chile, United States, Hungary, Bhutan, Norway, Kazakhstan, Belarus, Czech Republic, Morocco, Italy, Denmark, Venezuela, Lebanon, Zimbabwe, Belgium, Slovakia, Yemen, Puerto Rico, Algeria,Sri Lanka.
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