Note: it is a requirment of ASTM AM & ASTM FM standard theat the bolt nut & washer should be assembled and supplied by one manufacturer who shall . ASTM Standards: A Specification for Zinc Coating (Hot-Dip) on Iron and. Steel Hardware2. A M Specification for High-Strength Bolts for Struc-. ASTM AM 碳合金钢螺母 – ASTM American Society for Testing and Materials(美国材料与试验协会)成立于年,是美国最老.
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Class 12 nuts in nominal astmm diameters M42 and larger shall conform to dimensions for heavy hex nuts given in ANSI B When this heat treatment is used, there shall be particular attention to the requirements in 6. Size px x x asstm x The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition see 5. Materials shall be tested and the individual grades shall conform to specified values of material such as hardness and proof load, chemical, and mechanical requirements.
Class 05 nuts are made of carbon or alloy steel conforming to the chemical composition requirements specied for Class 10 nuts in Table 1, and are heat treated as specied in 4. A number in parentheses indicates the year of last reapproval. Heat analysis Product analysis Sulfur: Class 9 nuts marked on one of the wrenching ats shall have the numeral 9 underlined. B Acid bessemer steel only. A min max 0. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Last previous edition approved in as A — 07a. NOTE 10—If the overtapping diametral allowance is greater than the limit specied in 7. Work Item s – proposed revisions of this standard.
Zinc-coated nuts are nuts intended for use with externally threaded fasteners which are hot-dip zinc-coated, mechanically zinc-coated, or have a plating or coating of sufficient thickness to necessitate overtapping the nut thread to provide assemblability.
Heat analysis Product analysis Titanium: Details of these supplementary requirements shall be agreed upon in writing between the manufacturer and purchaser.
Number of Nuts in Lot and under to to 22 Over 22 Number of Specimens 1 2 3 5 Dimensional suitability of the nut for the intended application should be considered before approving substitution of a higher class. Link to Active This link will always route to the current Active version of the standard. Heat analysis Product analysis Molybdenum: When individual marking is required, the mark shall be the grade letter symbol on one face of the nut.
Plain Uncoated Nuts 7.
No other units of measurement are included in this standard. Nickel or molybdenum may be used. Heat analysis Product analysis Nickel: Such nuts shall be tapped oversize to have internal threads with maximum and minimum limits that exceed the maximum and minimum limits specied for metric coarse internal threads with Grade 6H tolerances a56m3 the following diametral allowances: Heat analysis Product analysis Sulfur: Your comments are invited either for z563m of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Heat analysis Product analysis Silicon: Referenced Documents purchase separately The documents listed below a5563m referenced within the subject standard but are not provided as part of the standard. The lubricant shall be applied to specified aa563m on the nuts, such as 1 principally only those portions which are threaded, or 2 on threaded portions and either only one bearing face or both bearing faces, as required, or 3 such other specific lubricant placement criteria as are agreed to between the purchaser and the user.
When properly exposed to the atmosphere, these steels can be used bare uncoated for many applications.
Nuts With Other Coatings 7. When the dimensional style of nut is not designated by the purchaser, hex nuts, Style 1, in conformance with ANSI B Rejection should be reported to the producer or supplier promptly and in writing.
Hex nuts made to the requirements of DH3 shall be marked with the symbol HX3 on one face. Committee F16 has identified the location of selected changes made to this standard since the last issue, A—04a, that may impact the use of this standard. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Threads of nuts tapped prior to zinc coating 4. Markings located on the top asstm bearing surface or on the top of the ange shall be positioned with the base of the numeral s oriented toward the nut periphery. When this heat treatment is used, particular attention shall be paid to the requirements in 6.
Nominal Nut Size, in. Note 1 — Throughout this specification, the term class means property class. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Additional tests of individual shipments of material are not ordinarily contemplated.
When required, they are covered by the applicable bolt specification.
Selection of steel analysis shall be the option of the manufacturer. When A zinc-coated inch series nuts are supplied, the zinc coating, overtapping, lubrication and rotational capacity testing shall be in accordance with Specification A This supplementary requirement shall in no way negate any requirement of the specification itself. It is informational only and not an official part of the standard; s563m full text of the adtm itself must be referred to for its use and application.
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