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This specification covers two types of heat treated, steel, tension control bolt-nut washer assemblies. An assembly consists of a tension control bolt with spline end and a suitable nut and washer. These assemblies are capable of developing a minimum predetermined tension when installed by applying torque to the nut, while at the same time applying a counter torque to separate the spline end from the body of the bolt using an appropriate spline drive installation tool. The fastener assemblies are intended for use in structural connections. The tension control bolts are designed by type denoting chemical composition as follows: Type 1—Plain carbon, carbon boron, or alloy steel; and Type 3—Weathering steel. Materials shall be tested using assembly lot tension test, and the individual grades shall conform to materials requirements such as heat treatment, thread, mechanical zinc coating, lubrication, and secondary processing; chemical composition, mechanical property requirements for tension control bolts such as hardness (Brinell and Rockwell C), tensile strength, and yield strength. Workmanship, finish and appearance; and head burst visual inspection are also detailed.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
1.1 This specification covers two types of heat treated, steel, tension control bolt-nut-washer assemblies, also referred to as “sets.” These assemblies are capable of developing a minimum predetermined tension when installed by applying torque to the nut, while at the same time applying a counter torque to separate the spline end from the body of the bolt using an appropriate spline drive installation tool.
1.2 An assembly consists of a tension control bolt with spline end (covered by this specification) and a suitable nut and washer covered by reference to applicable ASTM specifications.
1.3 The fastener assemblies are intended for use in structural connections. These connections, installation procedures, and the use of alternate design structural bolts are covered under the requirements of the “Specification for Structural Joints Using ASTM A 325 or A 490 Bolts,” approved by the Research Council on Structural Connection.
1.4 The assemblies are available with either round (button or dome) heads, heavy hex structural heads, or alternate design heads described in Section 10 and Fig. 1, in sizes ½ to 1 1/8 in. inclusive, in two types specified in Section 4.
1.5 Terms used in this specification are defined in Terminology F 1789
1.6 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 The following precautionary statement pertains only to the test method portions, Sections 13 and 14, of this Specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A194/A194M Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
A242/A242M Specification for High-Strength Low-Alloy Structural Steel
A325 Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength
A563 Specification for Carbon and Alloy Steel Nuts
A588/A588M Specification for High-Strength Low-Alloy Structural Steel, up to 50 ksi [345 MPa] Minimum Yield Point, with Atmospheric Corrosion Resistance
A709/A709M Specification for Structural Steel for Bridges
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
A871/A871M Specification for High-Strength Low-Alloy Structural Steel Plate With Atmospheric Corrosion Resistance
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
D3951 Practice for Commercial Packaging
F436 Specification for Hardened Steel Washers
F606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
ANSI/ASME StandardsANSIB18.18.3M Inspection and Quality Assurance for Special Purpose Fasteners
ICS Number Code 21.060.01 (Fasteners in general)
UNSPSC Code 31161600(Bolts); 31161700(Nuts); 31161800(Washers)