Historical textIn force on Oct. 1, 1998Source: annual CFR editions 1996–2004

§ 393.46 Brake tubing and hose connections.

Wording first on file in the 1996 annual edition, superseded by the 2005 annual edition.

govinfo, 1998 edition ↗

Compare with

Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 1998 edition's wording. An amendment that took effect between Oct. 1, 1998 and Oct. 1, 1998 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.

49 CFR § 393.46 — Brake tubing and hose connections.. Text in force on October 1, 1998. This wording effective October 1, 1996 to October 1, 2005. Source: govinfo, 1998 edition, https://www.govinfo.gov/app/details/CFR-1998-title49-vol4/CFR-1998-title49-vol4-sec393-46. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.46?asof=1998-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

All connections for air, vacuum, or hydraulic braking systems shall:

(a) Be adequate in material and construction to insure proper continued functioning;

(b) Be designed, constructed, and installed so as to insure, when properly connected, an attachment free of leaks, constrictions, or other defects;

(c) Have suitable provision in every detachable connection to afford reasonable assurance against accidental disconnection;

(d) Have the vacuum brake engine manifold connection at least three-eighths inch in diameter.

(e) If installed on a vehicle on or after January 1, 1981, meet requirements under applicable subsections of FMVSS 106 (49 CFR 571.106).

(f) Splices in tubing if installed on a vehicle after March 7, 1989, must use fittings that meet the requirements of SAE Standard J512-OCT 80 Automotive Tube Fittings or for air brake systems SAE J246—March 81 Spherical and Flanged Sleeve (Compression) Tube Fittings as found in the SAE Handbook 1985 edition.

[33 FR 19735, Dec. 28, 1968, as amended at 44 FR 25457, May 1, 1979; 53 FR 49400, Dec. 7, 1988]

Amendment history

2 distinct wordings on file since Oct. 1, 1996

Oct. 1, 2005 → presentannual editions 2005–2016diff vs. previous
Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004viewing
[33 FR 19735, Dec. 28, 1968, as amended at 44 FR 25457, May 1, 1979; 53 FR 49400, Dec. 7, 1988]

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.