Eaton Crouse-Hinds 1040 Throat Bushing - 105°C 4in Threaded
Part Number: 1040
Quick Summary
Eaton Crouse-Hinds throat bushing insulates and secures rigid/IMC conduits in industrial electrical installations. This compact, insulated solution minimizes arc risks and heat transfer at terminations, reducing maintenance downtimes. It aligns with NEC/CEC standards and UL certification for rigid/IMC fittings in ordinary/non-hazardous locations, delivering reliable protection and long-term service life. For engineers and buyers, the 1040 provides a compliant, easy-to-install interface that supports 4-inch trade-size conduit with a threaded connection while leveraging malleable iron durability and a 105°C rating for demanding environments.
Product Information
Extended Description
1040 Eaton Crouse-Hinds: Eaton Crouse-Hinds series throat bushing, Rigid/IMC, Insulated, Malleable iron, 105°C, Threaded, 4"
Product Name
Eaton Crouse-Hinds series throat bushing
Catalog Number
1040
Product Length/Depth
5.03 in
Product Height
1.35 in
Product Width
4.94 in
Product Weight
0.79 lb
UPC
784564110404
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Conduit type
Rigid/IMC
Insulator
Insulated
Thread
Threaded
Trade size
4"
Material
Malleable iron
Temperature rating
105°C
Crouse-Hinds series Insulating and Throat Bushings - Rigid-IMC catalog page
Insulating and Throat Bushings - Rigid-IMC UL certification
Insulating and Throat Bushings - Rigid-IMC UL certification
Eaton Specification Sheet - 1040
Feature → Business Impact → Application: The 1040 throat bushing uses a rigid/IMC conduit interface with an insulated design and a threaded connection, delivering secure mounting and mitigated arc risk in equipment enclosures. This reduces rework and helps maintain compliance during panel upgrades or new builds, especially in control panels and junction boxes that require a 4" trade size. Application: Ideal for manufacturing lines and machine controls where reliability and insulation matter for safety and performance. Feature → Business Impact → Application: Constructed from malleable iron, the 1040 provides rugged mechanical strength, resisting deformation under vibration and thermal cycling, which lowers maintenance costs and extends service life. Application: Suitable for harsh factory floors and HVAC or dry locations where durability matters. Feature → Business Impact → Application: NEC/CEC compliance and UL certifications validate safe installation in ordinary/non-hazardous locations, simplifying audits and reducing risk during code inspections. Application: Preferred in automotive assemblies, process automation panels, and data-center adjunct enclosures. Feature → Business Impact → Application: 5.03 in length, 1.35 in height, 4.94 in width with a 0.79 lb weight enables predictable fitment in standard racks and enclosures, easing field stocking and installation. Application: Inventory planning for spares in maintenance closets and manufacturing plants. Feature → Business Impact → Application: Temperature rating of 105°C allows use in environments with elevated ambient temperatures or near motor drives, minimizing performance loss and thermal excursions. Application: Industrial motor control centers and switchgear terminations. Feature → Business Impact → Application: The combination of insulated construction and threaded ends supports straightforward installation with compatible conductors and fittings, reducing training time for technicians and enabling faster work orders. Application: New-build panels and upgrade projects where time-to-spare and serviceability are critical. Feature → Business Impact → Application: The 4" trade size and rigid/IMC conduit compatibility help ensure consistent electrical clearance, insulation integrity, and mechanical protection across project scopes, from panel doors to enclosures. Application: OEM equipment builds and retrofit projects requiring standardized components.
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FAQs
The 1040 is designed for rigid/IMC conduit with a 4-inch trade size and a threaded connection. It is insulated and made from malleable iron, providing a secure, vibration-resistant interface suitable for standard electrical enclosures and control panels in ordinary/non-hazardous locations.
Key specs include malleable iron construction, insulated design, and a temperature rating of 105°C. The threaded, 4" trade size is paired with an overall compact footprint (5.03 in L, 1.35 in H, 4.94 in W) to maintain mechanical integrity while protecting the conductor terminations from heat and arcing.
Yes. The 1040 is certified for Ordinary/Non-Hazardous Locations under NEC/CEC standards and UL-listed for Rigid/IMC fittings. It is well-suited for control panels, equipment enclosures, and junctions in non-hazardous environments where insulation and robust mounting are required.
The 1040 benefits from NEC/CEC standards alignment and UL certification for Rigid/IMC conduit fittings. Catalog pages and a dedicated UL listing page are available, along with a specification sheet from Eaton to aid procurement and engineering validation during audits.
By delivering reliable insulation, mechanical protection, and code compliance, the 1040 reduces downtime from insulation failures and arcing, lowers rework, and simplifies audits. Its durable malleable iron construction and standardized 4" size support longer service intervals and predictable lifecycle costs in panel assemblies and field installations.