ASME B18.2.6-2019 pdf download

ASME B18.2.6-2019 pdf download.Fasteners for Use in Structural Applications.
2.2 MateriaL and MechanicaL Properties
Chemical and mechanical properties of steel bolts shall conform to ASTM F3125/F3125M.
2.3 Finish
Unless otherwise specified, bolts shall be supplied with a plain (as-processed) finish, unplated or uncoated. If a finish is required, it shall conform to the requirements of ASTM F3125/F3125M.
2.4 Designation
(a) Heavy hex structural bolts shall be designated by the following data in the sequence shown: product name, specification, nominal size (fractional or decimal equivalent), threads per inch, product length (fractional or two-decimal place equivalent), material (including specification, grade, and type), and protective finish (if required).
EXAMPLES:
(1) Heavy Hex Structural Bolt, ASME B18.2.6, 3/4 —10 x 2’/4,ASTM F3125/F3125M Grade A325 Type 1, Hot-Dip Galvanized per ASTM F2329/F2329M
(2) Heavy Hex Structural Bolt, ASTM F3 1 25/F3 1 25M Grade A325 Type 1, % — 10 x 21%’ Hot-Dip Galvanized per ASTM F2329/F2329M
(b) For a part identifying number (PIN), refer to ASME B18.24.
2.4.1 NominaL Size. When specifymg nominal size in decimals, zeros preceding the decimal shall be used and the fourth decimal place shall be omitted.
EXAMPLES:
(1) Heavy Hex Structural Bolt, ASME B18.2.6, 0.750 — 10 x 2.25, ASTM F3125/F3125M Grade A325 Type 1, Hot-Dip Galvanized per AS’I’M F2329/F2329M
(2) Heavy Hex Structural Bolt, ASTM F3125/F3125M Grade A325 Type 1, 0.750 — 10 x 2.25, Hot-Dip Galvanized per ASTM P2329/ F 2329 M
2.5 Identification SymboLs
When raised, identification marking symbols on the tops of heads for bolt sizes in. and smaller shall project not less than 0.005 in. above the surlace nor more than 0.015 in. over the specified maximum head heighL Bolt sizes larger than /8 in. shall project not less than the equivalent in inches of 0.0075 times the basic bolt diameter above the surface nor more than 0.030 in. over the specified maximum head height.
2.5.1 Grade SymboLs. Each bolt shall be marked in accordance ‘with the requirements of ASTM F3125/F3125M.
2.5.2 Source SymboLs. Each bolt shall be marked to identify the source (manufacturer or private label distributor) accepting the responsibility for conformance to this and other applicable specifications.
2.6 Workmanship
The allowable limits, inspection, and evaluation of surface discontinuities, quench cracks, forging cracks, head bursts, shear bursts, seams, folds, thread laps, voids, tool marks, nicks, and gouges shall be in accordance with ASTM F788.
2.7 QuaLity Assurance
Unless otherwise specified, products shall be furnished in accordance with ASME B18.18.
3 HEAVY HEX NUTS: ASTM A563 AND ASTM A194/A194M
3.1 Nut Dimensions
Nuts shall conform to the dimensions given in Table 3.1-1. Heavy hex nut formulas for thickness, width across flats, and width across corners are given in ASME B18.2.2, Nonmandatory Appendix A.
3.1.1 Width Across FLats. The width across flats of heavy hex nuts shall be the overall distance measured, perpendicular to the axis of the nut, between two opposite sides of the nut in accordance with Table 3.1-1. For milled-from-bar hex nuts, the nominal bar size used shall be the closest commercially available size to the specified basic width across flats of the nut. If the bar dimensions will not conform to the dimensions in Table 3.1-1, the manufacturers must obtain approval from the purchaser prior to manufacturing.
4.1.2 ToLerances. Washer inside diameter, outside diameter, thickness, and edge distance shall be in accordance with Table 4.1.1-1. The deviation from flatness shall not exceed 0.010 in. per inch as the maximum deviation from a straight edge placed on the cut side. Circular runout of the outside diameter with respect to the hole shall not exceed 0.030 FIM. Burrs shall not project above immediately adjacent washer surface by more than 0.010 in.
4.1.3 Finish. Unless otherwise specified, washers shall be supplied with a plain (as-processed) finish. If a finish is required, it shall conform to those approved in the applicable material standard.
4.1.4 MateriaLs and MechanicaL Properties. Materials and properties shall conform to the requirements specified in
ASTM F436/F436M.
4.1.5 Workmanship. Washers shall he free of excess mill scale, excess coatings, and foreign material on bearing surfaces. Arc and gas cut washers shall be free of metal splatter.
4.1.6 Designation
(a) Washers shall be designated by the following data in the sequence shown: product name, specification, nominal size (fraction or decimal), material specification, and proteclive finish (if required).
EXAMPLES:
(1) Hardened Steel Circular Washer, ASME B 18.2.6, 11/H, ASTM F436/F436M, Mechanical Zinc, ASTM B695 Class 55, Type I
(2) Hardened Steel Circular Washer, ASME B 18.2.6, ASTM F436/F436M, Type 1, Mechanical Zinc per ASTM B695 Class 55
(b) For a part identifying number (PIN), refer to ASME B18.24.