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Silver aluminum vertical sealing fitting, 4-15/16 inch overall length, 1-1/4 FNPT x MNPT ends

Appleton Century Crofts

Appleton Century Crofts 4-15/16" Sealing Fitting 25% Fill 1-1/4" FNPT x MNPT Aluminum Conduit

SKU CH-MASB-56WNW

Vertical sealing fitting for 1-1/4 in conduit, 25% fill, 4-15/16 in overall length, aluminum, hazardous-location rated

  • Color and finishSilver
  • Product typeConduit Fittings
  • Overall length6.8
  • Vertical sealing fitting blocks gas and flame passage
  • 25 % fill rating for 1-1/4 in conduit systems
  • Aluminum construction with silver finish
  • Class I Div 1/2 and Class II Div 1/2 hazardous ratings
  • 4-15/16 in overall length fits vertical runs

Hazardous-location sealing fitting

This Appleton Century Crofts sealing fitting is built for vertical runs in conduit systems that must block gases, vapours or flames between sections. It carries Class I Division 1 and 2 Groups C D, Class II Division 1 and 2 Groups E F G and Class III ratings for hazardous areas. The 1-1/4 inch FNPT by MNPT ends join compatible IMC or RMC conduit.

Passive thermal and noise profile

The aluminium body dissipates heat without fans or moving parts so operation is completely silent. No power is drawn by the fitting itself; it simply maintains the integrity of the sealed raceway. Normal use adds no audible or thermal load to the installation.

Aluminium construction and threaded ends

Silver-finished aluminium resists corrosion in demanding industrial environments. The 4-15/16 inch overall length and male-to-female NPT threads allow direct inline assembly without extra couplings. Vertical orientation is required to meet the listed hazardous-location ratings.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $79.99
Pricier than about 81% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameAppleton Electric
Color and finishSilver
Product typeConduit Fittings

Questions about this item

How do I install this vertical sealing fitting and which orientation step is commonly missed?

Mount the fitting vertically with the 1-1/4 FNPT end facing up, thread it onto compatible IMC or RMC conduit, and pack the chamber with approved sealing compound to the 25% fill limit; the step often missed is confirming vertical orientation before pouring compound.

What maintenance or replacement will this aluminum sealing fitting need over time?

Inspect the sealing compound periodically for cracks or shrinkage and replace the compound if integrity is lost; the aluminum body and NPT threads do not require scheduled replacement unless physical damage or corrosion appears.

What limit appears first when this fitting runs continuously in a hazardous location?

The 25% fill capacity is the primary limit; exceeding it prevents proper sealing and voids the Class I Division 1 and 2, Groups C, D and Class II Division 1 and 2, Groups E, F, G rating.

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