Flange Bolts
Jiangsu Zhenya Special Screw Co.,Ltd is one of the leading China flange bolts manufacturers and suppliers,Website:, as a professional company, our productive factory is able to produce CE certification flange bolts at both high quality and low price. Welcome to buy discount and cheap, or wholesale products from us.
This bolt is identifiable by the ridge or surrounding the bolt head, this built-in washer under the head of the Bolt acts to distribute the clamping load over a greater area. A flange bolt is designed to provide the same holding power as a washer. Zinc plating, retards the corrosion rate in a normal atmosphere.
Hex Flange Screw, Serrated, Case Hardened, Zinc Plated , A2,A4
The information below lists the required dimensional, chemical and physical characteristics of the products in this purchase order. If the order received does not meet these requirements, it may result in a supplier corrective action request, which could jeopardize your status as an approved vendor. Unless otherwise specified, all referenced consensus standards must be adhered to in their entirety.
W
H
H₁
F
Nominal Size
Width Across
Head
Wrench
Flange Diameter
Flats
Thickness
Height
Max.
Min.
Max.
Min.
Max.
Min.
#4
0.112
0.188
0.181
0.079
…
0.243
0.225
#6
0.138
0.250
0.244
0.157
0.133
0.350
0.314
#8
0.164
0.250
0.244
0.186
0.157
0.374
0.338
#10
0.190
0.312
0.304
0.210
0.185
0.454
0.424
#12
0.216
0.312
0.305
0.24
…
0.52
0.398
1/4
0.250
0.375
0.367
0.28
0.17
0.56
…
5/16
0.313
0.500
0.489
0.32
0.21
0.68
…
3/8
0.375
0.562
0.551
0.39
0.25
0.81
…
7/16
0.438
0.625
0.612
0.46
0.30
0.93
…
1/2
0.500
0.750
0.736
0.51
0.34
1.07
…
5/8
0.625
0.9375
0.922
0.62
0.42
1.33
…
3/4
0.750
1.1250
1.100
0.73
0.51
1.59
…
Specification Requirements:
Dimensions: Per ASME B18.2.1 **Exceptions: #12 and smaller,
see dimensions above. All lengths are fully threaded
Length Tolerance: Sizes 4-12: Refer to ASME B18.6.3
Sizes 1/4”-3/4”: Refer to ASME B18.2.1
Material: Low Carbon Steel
Mechanical Properties:Case-Hardened Carbon Steel:
Tensile: 120,000 PSI Minimum
Case Hardness: HRC 40 min.; case depth .002 to .007” for
sizes 4 to 10, over ¼” case depth .005 to .011
Finish:Fe/Zn 3AT per ASTM F1941
Hydrogen Embrittlement: Baking to relieve internal hydrogen embrittlement is
mandatory and shall be performed after electroplating
prior to the application of conversion finish where baking
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