BS 2A204,2A206,2A208,A217-A225(1963) : 1963 PD 6167
Current
The latest, up-to-date edition.
SPECIFICATIONS FOR MACHINE SCREWS AND NUTS (UNIFIED THREADS) BELOW 1/4 INCH FOR AERONAUTICAL PURPOSES
23-11-2012
FOREWORD
SPECIFICATION
1. SCOPE
2. MATERIALS
3. FREEDOM FROM DEFECTS
4. DIMENSIONS
5. HEADS OF SCREWS
6. LENGTH OF SCREWS
7. ENDS OF SCREWS
8. SCREWS THREADS
9. LENGTH OF THREAD ON SCREWS
10. CHAMFERING
11. COUNTERSINKING
12. FINISH
13. IDENTIFICATION AND MARKING
Appendix A - ALTERNATIVE METHODS OF IDENTIFICATION
OF SCREWS WITH UNIFIED THREADS
Appendix B - FLUSHNESS GAUGE FOR COUNTERSUNK HEAD
SCREWS
Appendix C - FORMULAE FOR DIMENSIONS OF COUNTERSUNK
HEAD SCREWS
Appendix D - MILLIMETERE EQUIVALENTS OF BASIC DIAMETERS
OF SCREWS AND NUTS
Appendix E - TABLE FOR CONVERSATION OF INCHES TO APPROXIMATE
MILLIMETERE EQUIVALENTS
Gives dimensions, material, protective treatment and part numbers for countersunk head and pan head machine screws and nuts with Unified threads for aeronautical use.
| Committee |
ACE/12
|
| DevelopmentNote |
Supersedes BS A204-209(1957) (07/2005) Reviewed and confirmed by BSI, January 2008. (12/2007)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| 15/30281806 DC : 0 | BS A 401 TO A 420 - AEROSPACE SERIES - SPECIFICATION FOR SCREWS, PAN AND 100 DEGREES COUNTERSUNK HEAD, HEXALOBULAR DRIVE RECESS (UNIFIED THREADS BELOW 1/4 INCH), VARIOUS MATERIALS |
| BS A 401-420:2015 | Specification for screws, pan and 100° countersunk head, hexalobular drive recess (unified threads below ¼ inch) in various materials |
| BS 3155(1960) : LATEST | AMERICAN MACHINE SCREWS AND NUTS IN SIZES BELOW .25 INCH DIAMETER |
| BS 350-2(1962) : LATEST | CONVERSION FACTORS AND TABLES - DETAILED CONVERSION TABLES |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.