The best 3/4-inch chase nipple depends on the conduit type, whether an offset is needed, and whether the throat should be insulated. For bulk 3/4-inch EMT work, the 50-piece offset pack is a quantity-focused option; RACO 1663 is another 3/4-inch offset choice. Arlington 502 is a 3/4-inch die-cast zinc chase nipple listed for IMC, while COREX offers an insulated-throat option for rigid/IMC. The RACO 1664 is included as a size alternative, but it is 1 inch—not 3/4 inch.
| Product | Trade size | Best suited for |
|---|---|---|
| 50-piece offset pack | 3/4 inch | Bulk EMT projects |
| RACO 1663 | 3/4 inch | Bulk offset connections |
| Arlington 502 | 3/4 inch | IMC conduit connections |
| COREX insulated nipple | 3/4 inch | Rigid/IMC with insulated throat |
| RACO 1664 | 1 inch | Projects requiring a larger size |
50-Piece 3/4-Inch Offset Chase Nipple
This bulk pack is best for projects that need many 3/4-inch EMT offset connectors. The listed features specify 50 pieces, die-cast zinc construction, and a compact 1.2 x 1.2 x 0.7-inch design. The connectors are described for joining EMT conduit to junction boxes in installation, maintenance, and replacement work.
Choose this option when quantity and an offset connection are priorities. The product listing describes corrosion and wear resistance, but it does not provide certification details in the supplied information. Confirm the fitting style, applicable requirements, and project specifications before installation.
RACO 1663 3/4-Inch Offset Nipple
RACO 1663 is best for buyers seeking a 3/4-inch trade-size offset nipple in a 50-piece pack. Its listed features identify non-insulated, rugged metallic construction and die-cast zinc. The carton quantity can suit larger installations or stocking replacement parts.
Choose it when the project calls for an offset fitting and a bulk quantity. This model is non-insulated, so it is not the right choice when an insulated throat is specifically required. The supplied product details do not specify a conduit compatibility range; verify the fitting against the installation design.
Arlington 502 3/4-Inch Chase Nipple
Arlington 502 is best for a 3/4-inch chase nipple application involving IMC conduit. The listing describes die-cast zinc construction, a hex head, and an MNPT connection. It also states that the product is UL listed and CSA certified. The listed dimensions include 0.614 inch and a 1.31-inch hex measurement.
Choose this model when its stated IMC suitability and threaded connection match the job. Avoid assuming that it is an offset connector: the supplied details identify it as a hex-head chase nipple, not an offset fitting. Check the required trade size and connection before ordering.
COREX 3/4-Inch Insulated Chase Nipple
COREX is best for buyers who need a 3/4-inch rigid/IMC fitting with an insulated throat. The product is described as malleable iron with a zinc-plated finish, intended to help protect against corrosion. The listing identifies it as a one-pack fitting.
Choose this option when the insulated throat is an important requirement and the stated rigid/IMC use fits the installation. It is not described as an offset nipple, and the provided details do not state certification information. Confirm both details against project requirements.
RACO 1664 1-Inch Offset Nipple
RACO 1664 is best only when the job calls for a 1-inch trade-size offset nipple. Its listed features specify non-insulated die-cast zinc construction, rugged metallic construction, and a 25-piece pack. It is included as a larger-size comparison, not as a direct 3/4-inch replacement.
Do not choose this product for a 3/4-inch opening or connection: its listed trade size is 1 inch. The product details mention additional sizes but do not establish that this particular item fits 3/4-inch conduit.
Buying Guide: How To Choose A 3/4-Inch Chase Nipple
Does the job need an offset fitting?
Offset nipples and standard chase nipples are not interchangeable descriptions. The 50-piece pack and RACO 1663 are identified as offset products. Arlington 502 is listed as a hex-head chase nipple, and COREX is described as a chase nipple with an insulated throat. Match the fitting shape and connection to the installation plan rather than relying on the word “nipple” alone.
Which conduit type and trade size should you check?
Confirm the required trade size and conduit type before purchase. The first four options above are listed as 3/4 inch, but their stated applications differ: the bulk pack specifies EMT, Arlington specifies IMC suitability, and COREX specifies rigid/IMC. RACO 1664 is 1 inch. Do not assume that matching trade size alone establishes compatibility.
Should you choose insulated or non-insulated?
Choose an insulated-throat fitting when the design calls for that feature; COREX explicitly lists an insulated throat. RACO 1663 and RACO 1664 are described as non-insulated. The supplied details do not identify insulation for every other product, so verify specifications rather than treating missing information as confirmation.
How many fittings do you need?
Pack sizes range from one COREX fitting to 25 RACO 1664 fittings and 50-piece packs for the offset options. Estimate the number of connection points and consider whether spare fittings are needed for replacements. For large installations, compare pack quantity as well as fitting style.
Frequently Asked Questions
What size is a 3/4-inch chase nipple?
Three-quarter inch refers to the listed trade size. Check the product specifications and the conduit connection requirements; do not treat trade size as a measurement of every outside dimension.
Can I use a 1-inch nipple in a 3/4-inch connection?
RACO 1664 is listed as 1 inch, so it should not be selected as a 3/4-inch fitting. Choose a product whose trade size matches the project requirements.
What is the difference between an offset nipple and a chase nipple?
An offset nipple has an offset form, while a chase nipple may have a straight or hex-head design. The product descriptions identify which style is offered; verify the needed geometry before buying.
Which option has an insulated throat?
The COREX 3/4-inch product explicitly lists an insulated throat. The RACO 1663 and 1664 listings identify their products as non-insulated.