文档介绍：FED-STD-H28 31 March 1978 Superseding NBS Handbook H28 PART I (1969) PART II (1957) PART III (1957) FEDERAL STANDARD SCREW-THREAD STANDARDS FOR FEDERAL SERVICES This standard was approved by missioner, Federal Supply Service, General Services Administration, for the use of all Federal agencies. . GOVERNMENT PRINTING OFFICE : 1978 - 261-423/1075 Orders for this publication are to be placed with General Services Administration, acting as an agent for the Superintendent of Documents. Single copies of this standard are available at the GSA Business Service Centers in Boston, New York, Philadelphia, Atlanta, Chicago, Kansas City, MO, Fort Worth, Houston, Denver, San Francisco, Los Angeles, and Seattle, WA. or from the General Services Administration, Specification and Consumer Information Distribution Branch, Bldg. 197, Washington Navy Yard, Washington, DC 20407. Price cents each. FSC THDS -STD-H28 31 March 1978 INFORMATION SHEET ON FEDERAL STANDARDS This Federal Standard is issued in loose leaf form to permit the insertion or removal of new or revised pages and sections. All Users of Federal Standards should keep them up to date by inserting revised or new pages as issued and removing superseded and cancelled pages. New and revised pages will be issued under Change Notices which will be numbered consecutively and will bear the date of issuance. Change Notices should be retained and filed in front of the Standard until such time as they are superseded by a reissue of the entire