Table of Contents

Foreword
Committee Roster
Correspondence With the B18 Committee
1 Introduction
2 General Data
3 Helical Spring Lock Washer SEMS
4 Tooth Lock Washer SEMS
5 Conical Washer SEMS
6 Plain Washer SEMS
Nonmandatory Appendices
A - Reference Information for Users of This Standard
B - Plain Washers on Tapping Screws
C - The Relationship of This Revision to Previous
    Revisions of This Standard and to ISO Standards
D - Manufacturing
E - Statistical Expression of Hardness
F - Recovery Test
G - How SEMS Function

Abstract

Describes the general, dimensional, material, and mechanical requirements for metric through-hardened (property classes 8.8, 9.8, and 10.9) machine screws and case-hardened tapping screws from 5 mm to 12 mm captivated washer assemblies (SEMS).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Society of Mechanical Engineers
ProductNote	Reconfirmed 2011
Pages
ISBN