46 C.F.R. § 56.75-10 Joint clearance (reproduces 128.2.2).
Title 46 - Shipping
(a) The clearance between surfaces to be joined shall be no larger than is necessary to insure complete capillary distribution of the filler metal; between 0.002–inch minimum and 0.006-inch maximum. (b) [Reserved]
Title 46: Shipping
PART 56—PIPING SYSTEMS AND APPURTENANCES
Subpart 56.75—Brazing
§ 56.75-10 Joint clearance (reproduces 128.2.2).