[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR179.100-17]

[Page 1071]
 
                        TITLE 49--TRANSPORTATION
 
   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 
                      DEPARTMENT OF TRANSPORTATION
 
PART 179_SPECIFICATIONS FOR TANK CARS--Table of Contents
 
 Subpart C_Specifications for Pressure Tank Car Tanks (Classes DOT-105, 
                         109, 112, 114 and 120)
 
Sec.  179.100-17  Closures for openings.

    (a) Closures shall be of approved design and made of metal not 
subject to rapid deterioration by the lading. Plugs, if used, shall be 
solid, with NPT threads, and shall be of a length which will screw at 
least six threads inside the face of fitting or tank.
    (b) [Reserved]