FED-STD-H28 美国联邦螺丝标准手册

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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 the Commissioner, Federal Supply Service,

General Services Administration, for the use of all Federal agencies.

U.S. 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 2.50 cents each.

FSC THDS

FED-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revised or new pages as issued and removing superseded and cancelled pages.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are superseded by a reissue of the entire Standard.

NOTICE

From 1939, the Interdepartmental Screw-Thread Committee (ISTC), under the

Chairmanship of the National Bureau of Standards (NBS), Department of

Commerce had developed and published NBS Handbook H28, Screw-Thread Standards

for Federal Services.

Section 487 of Title 40 of the U.S. Code states that the authority for

development of Federal Standards for procurement purposes rests with the

General Services Administration (GSA).

In November 1976, the ISTC was terminated, and the General Services

Administration (GSA) accepted the responsibility for NBS Handbook H28 and

agreed to convert it and maintain it as a Federal Standard.

The standards which had been published as NBS Handbook H28, Part 1, Part

II and Part III will now be promulgated as a fully coordinated FED-STD-H28,

maintaining the existing sections and identifying them with slant lines. For

example, NBS Handbook H28, Part 1, Section 3 will be detailed standard

FED-S-TD-H28/3 which must be procured individually.

Military Custodians Preparing Activity

ARMY - AR DLA-IS

NAVY - AS

AIR FORCE - 11 (Project No. THDS-0003)

Civil Agency Coordinating Activity

ACO FPI MSF

AFS FRA NBS

BPA FSS PCD

FHW JFK RDS

FIS LRC TCS

FED-STD-H28

31 March 1978

CONTENTS

Page

1. PURPOSE AND SCOPE...................................... 1

1.1 PURPOSE............................................... 1

1.2 SCOPE................................................. 1

2. APPLICATION........................................... 1

3. DETAILED STANDARDS.................................... 1

4. APPENDIX.............................................. 2

5. COMPARABLE INDUSTRY STANDARDS......................... 3

ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿

³ The text of this section is reprinted from the NBS HANDBOOK H28 with ³

³ minor editorial corrections. Pages 44, 48, 55 thru 63, 65 thru 68, 71, ³

³ 72, 73, 74. 75 and 80 thru 86 contain corrections indicated by an ³

³ asterisk. ³

³ ³

³ Reorganization of the document from NBS HANDBOOK H28 to FED-STD-H28 ³

³ creates an editorial inconvenience, when maintaining continuity of cross ³

³ references amongst the pages, paragraphs, tables and figures of the ³

³ different sections. For this standard individual sections will be ³

³ numbered sequentially starting with (1) one. If the reprinted text ³

³ refers to another page, such as Page 6.3, this will be understood to mean ³

³ section 6 page 3. All figures and tables will maintain the established ³

³ designations, prefixed with the section; e.g. Table 3.1 and Figure 2.5 to ³

³ identify their location in this standard. All appendices will be ³

³ incorporated in the basic document FED-STD-H28 with other general ³

³ information and will continue to be identified with the prefix A. ³

ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ

iii

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标签： #螺丝标准 #螺纹类型 #尺寸数据

摘要：

FED-STD-H28 美国联邦螺丝标准手册是美国国防部发布的关键技术规范，涵盖统一螺纹（UN/UNR/UNJ）的尺寸、公差、量规及检验方法。该标准作为军事与工业领域螺纹紧固件的核心参考，适用于航空航天、国防装备及高精度制造行业。手册详细定义了60°牙型角螺纹的螺距、直径系列、中径公差及表面处理要求，并整合了ASME B1.1等国际标准。其内容确保螺丝连接在极端环境下的互换性与可靠性，是工程师进行设计选型、质量检验及合规认证的必备依据。遵循FED-STD-H28可有效降低装配失效风险，提升国产化

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