49 C.F.R. § 179.221-1
Individual specification requirements.
Cite as 49 C.F.R. § 179.221-1 (2026)
In addition to § 179.220, the individual specification requirements are as follows:
DOT specification
Insulation
Bursting
pressure
(psig)
Minimum
plate
thickness (inches)
Test pressure (psig)
Bottom
outlet
Bottom
washout
Reference
(179.221-***)
115A60ALW
Yes
240
3
⁄
16
60
Optional.
Optional
115A60W1
Yes
240
1
⁄
8
60
Optional
Optional
1
115A60W6
Yes
240
1
⁄
8
60
Optional
Optional
1
[Amdt. 170-52, 61 FR 28681, June 5, 1996, as amended at 62 FR 51561, Oct. 1, 1997; 66 FR 45390, Aug. 28, 2001]
- Cross-references to the CFR
- 179.220