46 C.F.R. § 164.023-5 – Performance; standard thread.

(a) Use Codes 1, 2, 3, 4BC, 4RB, 5 (any). Each thread which complies with all of the requirements of a specification listed in table 164.023-5(a) is assigned Use Codes 1, 2, 3, 4BC, 4RB, and 5 (any).

Table 164.023-5(a)[Use codes 1, 2, 3, 4BC, 4RB, 5(any)]
Federal or militaryspecification	Material	Type	Class	Ticket No. or size range
V-T-285E	Polyester	I or II	1	E, F, FF.
V-T-295E	Nylon	I or II	A	E, F, FF.
MIL-T-43624A	Polyester			24 through 12.
MIL-T-43548C	Polyester covered only			24 through 12.

(b) Use Code 4B. Each thread which meets the requirements of Federal Specifications V-T-295, Type II, Class A, number size 4, is assigned Use Code 4B.