ASME B18.2.6M pdf free download

ASME B18.2.6M-2012 pdf free download.Metric Fasteners for Use in Structural Applications.
1.1.1 This Standard covers the complete general and dimensional data for products in the metric series recognized as American National Standard for sizes M12 through M36. These four metric structural products include
(a) metric heavy hex structural bolts: ASTM A325M and ASTM A490M
(b) metric heavy hex nuts: ASTM A563M
(c) metric hardened steel washers; circular, circular clipped, and beveled: ASTM F436M
(d) metric compressible washer-type direct tension indicators: ASTM F959M
1.1.2 The indusion of dimensional data in this Standard is not intended to imply that all products described herein are stock production sizes. Consumers should consult with suppliers concerning lists of available stock production sizes.
1.2 DImensions
All dimensions in this Standard are in millimeters, unless stated otherwise, and apply to unpiated or uncoated product. When plating or coating is specified, the finished product dimensions shall be as agreed upon between supplier and purchaser. Symbols specifying geometric characteristics are in accordance with
ASME \14.5.
1.3 Options
Options, where specified, shall be at the discretion of the supplier, unless otherwise agreed upon by the purchaser and supplier.
1.4 Terminology
For definitions of terms relating to fastener dimensional or component features used in this Standard, refer to ASME 818.12.
1.5 Comparison to ISO and CEN Standards
ISO 4775 is similar to the nut in this Standard.
ISO 7415 is similar to the structural washer in this Standard.
There are no comparable ISO standards for compressible indicating washers.
CEN 14399 is a similar standard for structural fasteners including hex bolts, heavy hex nuts, structural washers, and compressible indicating washers.
1.6 Referenced Standards
Unless othen4’ise specified, the referenced standard shall be the most recent issue.
ASME BL3, Screw Thread Gaging Systems for Acceptability — Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ)
ASME Hl.13M, Metric Screw Threads — M Profile ASME B1.16M, Gages and Gaging for Metric M Screw Threads
ASME B182.4.6M, Metric Heavy Hex Nuts ASME 518.2.9, Straightness Gage and Gaging for Bolts and Screws
ASME B18.12, Glossary of Terms for Mechanical Fasteners
ASME B18.18, Quality Assurance for Fasteners ASME B18.24, Part Identifying Number (PIN) Code System br 818 Fastener Products
ASME Y14.5-2009, Dimensioning and Tolerancing Publisher: The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990; Order Department: 22 Liw Drive, RO. Box 29(X), FairField, NJ 07007-2900 (www.asme.org)
ASTM A325M, Structural Bolts, Steel, Heat Treated 834) Ml’a Minimum insile Strength (Metric)
ASTM A490M, High Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Joints (Metric)
ASTM A563M. Carbons and Alloy Steel Nuts (Metric) ASTM B695, Coatings of Zinc Mechanically Deposited on Iron and Steel
ASTM F43(,M, Hardened Steel Washers (Metric) ASTM F788/F788M, Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
ASTM F812/F812M, Surface Discontinuities of Nuts, Inch and Metric Series
2 METRIC HEAVY HEX STRUCTURAL BOLTS: ASTM A325M AND ASTM A490M
2.1 Metric Heavy Hex Structural Bolt Dimensions
Bolts shall conform to the dimensions given in Table 1.
2.1.1 Top of Head. The top of the head shall be full form and chamfered or rounded with the diameter of the chamfer circle, or start of rounding being equal to the maximum width across flats within a tolerance of
—15% of the maximum across flats dimen.sion.
2.1.2 WIdth Across Flats. The width across flats of heads shall be the distance measured perpendicular to the axis of product, overall between two opposite sides of the head.
2.1.3 Head Taper. The maximum width across flats shall not be exceeded. No transverse section through the head between 25% and 75% of actual head height, as measured from the bearing surface, shall he less than the minimum width across flats.
2.1.4 Head Height. The head height shall be that overall distance measured parallel to the axis of the product from the top of the head to the bearing surface and shall include the thickness of the washer lace.ASME B18.2.6M pdf download.