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Stainless Steel Radiator Filler Neck 2.23"/56mm Diameter (Medium)

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Handling Time:
Usually Ships Same Or Next Business Day
Brazing Material:
Outer Diameter (Cap Seal Surface O.D.):
Inner Diameter (Spring Plunger Seal Surface OD):
Approx 1-5/8"
Cap Size:
Uses All Caps that specify 2.23"
Country of Manufacture:
United States
Stainless Steel Radiator Filler Neck 2.23"/56mm Diameter (Medium) (3A27492SS)

Please See Details Below Before Ordering

These are the stamped Stainless; radiator/Surge Tank style filler neck mostly used on domestic cars and trucks and other industrial products. Keep In Mind These Are Made In The U.S.A These are manufactured with much better materials and brazing; The imported necks tend to crack and brazing will melt when you are installing them.
Applications: Radiator, Oil Surge Tank, Ect
Outer Diameter:  2.23" or 56mm. @ Cap Seal Surface O.D.
Inner Diameter:  1-5/8" @ Spring Plunger Seal Surface OD
Lower Hole Opening Diameter 1-1/8"
Material:  22 Gauge 304 Stainless.
Overflow Tube Diameter: 5/16 OR 8mm (Works with 3/8"
Overflow Tube Length:   1-3/8"
Pressure Rating: SAE J164
Quantity Discounts Available: Quantity Discounts Available
Part#  3A27492SS
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2 Reviews Hide Reviews Show Reviews

  • 3
    Stainless filler neck

    Posted by Robert Taua on Dec 25th 2017

    I was able to complete the job. Glad I found your web site. It was an easy out the door ordering no fuss or confusion. Thanks for shipping to the 50th state. I'll be back to do more business with you folks. Have a prosperous New Year. Mahalo

  • 5
    Excellent Fit

    Posted by Anonymous on Jun 26th 2017

    The stainless steel filler neck was perfect for a 2" pipe - the material is thin - but weldable - this was for a expansion tank on a vehicle that does not have a replacement avialable. Could not believe that a stainless steel neck was available - there are two sizes - ordered both - used the bigger one.