ASME B18.31.5 pdf free download

ASME B18.31.5 pdf free download Bent Bolts (Inch Series)
The gaginglimitforboltsaftercoatingshallbe verified by assembly of a nut tapped as nearly as practical to the amount oversize shown in the above table. In the case of dispute, a calibrated GO thread ring gage of the same oversized requirements shown above shall be used. Assembly of the gage, or the oversized nut as described, must be possible with hand effort following application of light machine oil to prevent galling and damage to the gage or nut. The full thread length shall be measured, parallel to the axis of the thread, from the extreme end of the bolt to the last complete (full form) thread. The transition from full thread to no thread shall be within three thread pitches of the basic full thread length.
2.4 Bend Diameters The outside of the bent portion shall have no cracks. Unless otherwise specified, the cross-sectional area of the bend shall be the manufacturer’s option. Inside diameters or bend radii shall be as agreed between the buyer and manufacturer, as each dimension depends on material characteristics. While a common rule is that a low carbon steel round bar of a given diameter can be bent into a radius equal to half of its diameter, users are encouraged to consult the product manufacturer or ASTM A675/A675M for additional guidance.
2.5 Ends For bolts made with UNC threads, the ends shall be chamfered or the first thread rolled undersize. For bolts made with UNF threads, the ends shall be chamfered.
2.6 Materials Unless otherwise specified, the products in this Standard shall be made of low carbon steel as defined here as steel with less than 0.28% carbon. The minimum tensile strength for carbon steel shall be 36,000 psi unless a specific material specification is invoked or a higher tensile strength is specified by the purchaser. Nonmandatory Appendix A provides PIN designa- tors for some commonly used materials for parts illus- trated in this Standard. This Standard does not supersede or change any requirements of those stan- dards referenced in Nonmandatory Appendix A. Parts ordered using the PIN designators must still meet the requirements of the associated standards. Nonmandatory Appendix A does not limit the material options that can be ordered using the modified tradi- tional system for identifying bent bolts provided in para. 2.9.2.
2.7 Finishes The purchaser shall designate the required finish. Unless otherwise specified, plain finish steel shall be coated with a light oil to protect from corrosion during transportation and storage. It is recommended that electroplated bolts be finished in accordance with ASTM F1941. Hot-dip zinc coating shall be in accordance with ASTM F2329. For other coated products, the purchaser shall specify the coating and thickness. A number of coatings are identified in Nonmandatory Appendix A. Unless otherwise specified by the purchaser, coating thickness and embrittlement testing conformance shall be determined in accordance with the specified coating standard. If the number of samples to be tested is not identified in the coating specification, the number of samples shall be as required by ASTM F1470.
2.8 Workmanship Workmanship and surface discontinuities shall con- formto the requirements in the referenced productmate- rial standard (see para. 2.6). When the engineering application or the application requirements necessitate that surface discontinuities be more closely controlled, the purchaser shall specify the applicable limits in the original inquiry and purchase order. When a referenced fastener product or material stan- dard does not address cracks and bends, there shall be none that are visible without magnification.