# Closure.

**Citation:** 49 CFR 178.362-3  
**Type / status:** regulation / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2003-10-01  
**Published:** Not stated

(a) Closure for the wooden protective jacket is provided by the steel reinforcing rods. The end cap (lid) must fit tightly to the body of the jacket to prevent a heat path to the inside of the jacket. The lid joint for specifications 20WC-3, 20WC-4, 20WC-5, and 20WC-6, may not be coplanar with the e

## Document text

(a) Closure for the wooden protective jacket is provided by the steel reinforcing rods. The end cap (lid) must fit tightly to the body of the jacket to prevent a heat path to the inside of the jacket. The lid joint for specifications 20WC-3, 20WC-4, 20WC-5, and 20WC-6, may not be coplanar with the end of the inner containment vessel.

(b) Specifications 20WC-2 and 20WC-6. Locking ring closure, if used, must conform to § 178.354-4. Flanged closure, if used, must have at least 8 steel bolts (at least 6 mm (0.25-inch) diameter for 20WC-2 or 1.2 cm (0.50-inch) diameter for 20WC-6) and lock nuts (or equivalent device), spaced not more than 13 cm (5 inches) between centers.

[Amdt. 178-35, 39 FR 45252, Dec. 31, 1974. Redesignated by Amdt. 178-97, 55 FR 52716, Dec. 21, 1990, as amended at 63 FR 37462, July 10, 1998; 66 FR 45387, Aug. 28, 2001]

## Provenance

- Official: Yes
- Source: <https://www.govinfo.gov/app/details/CFR-2003-title49-vol2/CFR-2003-title49-vol2-sec178-362-3>
- Source ID: `govinfo-cfr`
- SHA-256: `b9ffa0f91e3d350fcd5e9526e553a92a718cd19f425e57c542018e6b8dc85d5d`
- Retrieved: 2026-08-13T06:37:29.399Z
- Exported: 2026-08-23T16:14:53.202Z
- Document slug: `49-cfr-178-362-3`

### Source metadata

```json
{
  "part": "178",
  "section": "178.362-3",
  "subpart": "Subpart K—Specifications for Packagings for Class 7 (Radioactive) Materials",
  "annualEdition": 2003,
  "revisedAsOf": "2003-10-01",
  "govInfoPackage": "CFR-2003-title49-vol2",
  "legalStatus": "official-annual-cfr-edition",
  "effectiveDateNote": null,
  "historicalAnchor": true,
  "historicalAnchorNote": "The section appears in an official annual CFR edition but is absent from the connected current eCFR corpus.",
  "jurisdiction": "US"
}
```