A-A-1341A
3.6 Proof Torque. When tested as specified in ASME-B 107.6, the wrenches shall withstand the proof torque specified in Table 1 without failure or permanent deformation that might affect the durability or serviceability of the wrench.
3.7 Wrench Opening. The nut and bolt head-engaging surfaces of the wrench shall be finished in a smooth and well-defined manner. Tolerances shall be such as to insure acceptance when gaged with gages conforming to ASME B 107. 17M.
3.8 Wrench Handle. Shall be of a stub end round design and suitable for accepting handle extension.
The wrench handle shall be provided with a plunger stop to prevent handle extension from turning or slipping under normal working conditions. At the suppliers’ option, a stop maybe provided.
3.9 Finish.
3.9.1 Surface Finish. All surfaces shall be thoroughly cleaned, free from cracks, and essentially free from burrs, pits, nodules, and other detrimental deficiencies.
3.9.2 Coatings. The coating shall be chrome plate (3.9.2.1) phosphate (3.9.2.2), oxide (3.9.2.3), or alternate coating (3.9.2.4) and shall be specified in the contractor order. The coating shall be adherent, smooth, continuous, and free from uncoated areas, pits, blisters, nodules, and any other defects that would interfere with their protective value and serviceability.
3.9.2.1 Chrome Plate. Wrenches shall have a protective-decorative nickel-chromium plating. The nickel thickness shall be a minimum of 0.000150 in. The chromium thickness shall be a minimum of 0.000003 in. A nickel-iron undercoating (16% iron max.) may be substituted for nickel.
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3.9.2.1.1 Chrome Plate Tests:
One measurement of the thickness of each electroplated coating shall be conducted in accordance with any of the following, as appropriate, methods:
ASTM B 487: Standard Method for Measurement of metal and oxide coating thickness by microscopical examination of a cross section.
ASTM B 499: Standard Test Method for Measurement of coating thickness by the magnetic method: non-magnetic coatings of magnetic basis metals.
ASTM B 504: Standard Method for Measurement of thickness of metallic coatings by the coulometric method.
ASTM B 530: Standard Test Method for Measurement of coating thickness by the magnetic method: Electro deposited nickel coatings on magnetic and nonmagnetic substrates.
ASTM B 568: Standard, Test Method for Measurement of coating thickness by x-ray spectrometry.
ASTM B 748: Standard Method for Measurement of thickness of metallic coatings by measurement of cross section with a scanning electron microscope.
ASTM A 754: Standard Test Method for Coating thickness by x-ray fluorescence.
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