Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM F844-07A(2013)
• Năm ban hành / Publication date: 2013
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use
• Chỉ số phân loại Quốc tế (ICS) / By field: 21.060.30 - Vòng đệm, chốt
• Số trang / Page: 3

Phạm vi áp dụng / Scope of standard

1.1 This specification covers round and miscellaneous shape steel plain (flat) washers furnished in an unhardened condition.

1.2 The washers are intended for general use bolt, nut, and stud applications to provide increased bearing surface, spacing, and to prevent galling.

1.3 Unless otherwise specified, the washers are furnished with dimensions conforming to B18.22.1, Type A, Tables 1A and Tables 1B.

1.4 Hardened washers for use with heat-treated structural bolts are covered by Specifications F436 and F436M.

1.5 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.