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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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