Reading Conduit Body Part Numbers: Appleton, Crouse-Hinds, OZ-Gedney Decoded
Apr 15, 2026
You're staring at a conduit body stamped "LB47" or "T67CG" and need to cross-reference it across manufacturers for a rush order, or you're trying to spec a replacement that actually fits the existing raceway. Every major manufacturer—Appleton, Crouse-Hinds, OZ-Gedney—uses their own part numbering system, and decoding these alphanumeric strings quickly separates experienced procurement staff from those who end up ordering the wrong hub size or body style.
Quick Answer
A conduit body part number guide breaks down the alphanumeric codes used by major manufacturers to identify body type (LB, T, C, etc.), trade size, material, hub configuration, and gasket/cover options. While the letter codes for body shapes follow industry-standard conventions (LB = elbow back, T = tee, LL = elbow left), each manufacturer adds proprietary suffixes and prefixes to denote material composition, threaded vs. threadless hubs, and specialized features like explosionproof ratings or corrosion resistance.
Understanding Standard Conduit Body Type Codes
Before diving into manufacturer-specific systems, you need the baseline. The body type designation appears first in nearly every part number and follows NEMA conventions. These letter codes describe the internal pathway configuration:
- LB: Elbow, back opening (90° turn, cover faces away from conduit entry)
- LL: Elbow, left opening (90° turn, cover on left when facing entry)
- LR: Elbow, right opening (90° turn, cover on right when facing entry)
- T: Tee configuration (inline with perpendicular branch)
- C: Straight conduit body (no turn, access through cover)
- X: Cross configuration (four-way intersection)
- FS/FD: FS for single-gang device box, FD for double-gang
The number immediately following these letters indicates trade size in half-inch increments. An "LB47" translates to an LB-style body for 1/2-inch conduit, while "T67" denotes a tee body for 3/4-inch conduit. This numbering correlates to actual conduit trade sizes per NEC Article 358 and 344 standards for EMT and rigid metal conduit respectively.
When you're comparing options across manufacturers, start by confirming this body type and size match your raceway system. Our conduit bodies collection organizes inventory by these standard configurations to simplify cross-brand sourcing.
Appleton Part Number Structure
Appleton (Emerson) follows a relatively straightforward system. Their standard format reads: [Body Type][Trade Size][Material/Feature Code].
| Position | Meaning | Example Codes |
|---|---|---|
| 1-2 | Body configuration | LB, T, C, LL, LR, X |
| 3-4 | Trade size (coded) | 47 = 1/2", 67 = 3/4", 77 = 1", 87 = 1-1/4" |
| Suffix | Material/feature | G = Gasketed, M = Malleable iron, A = Aluminum, CG = Copper-free aluminum with gasket |
Example: LB67CG breaks down as LB body style, 3/4-inch trade size, copper-free aluminum with gasket and cover. Appleton's copper-free aluminum bodies meet UL 886 standards for hazardous locations when marked for such use.
Their Form 7 and Form 8 bodies add these designations before the body type (e.g., "Form7-LB67"). Form 7 indicates a body rated for Class I, Division 2 per NEC 501.10(B), while Form 8 designates explosionproof construction meeting Class I, Division 1 requirements under NEC 501.10(A)(1).
Appleton also uses "EYS" and "EYM" prefixes for sealing fittings (per NEC 501.15 requirements), though these aren't technically conduit bodies—they're often cross-referenced during procurement for hazardous location installations.
Crouse-Hinds (Eaton) Decoding System
Crouse-Hinds employs a more complex alpha-suffix system that packs significant specification detail into compact codes. Their base format: [Body Type][Trade Size]-[Material Code][Feature Codes].
| Code Element | Specification | Common Values |
|---|---|---|
| Material prefix | Base metal | None = Malleable iron, A = Aluminum, SA = Special aluminum alloy |
| Trade size | Conduit diameter | 5 = 1/2", 7 = 3/4", 10 = 1", 12 = 1-1/4", 15 = 1-1/2", 20 = 2" |
| Hub type | Connection method | Blank = Threaded hubs, M = Myers hubs (threadless) |
| Gasket/cover | Seal configuration | G = Gasketed, CG = Cover and gasket included |
Example: LB17CG translates to LB body, 1-inch trade size, cover and gasket included. If you see LB17MCG, the "M" indicates Myers-style threadless hubs instead of threaded entries—critical distinction when matching to existing EMT installations using setscrew connectors.
Crouse-Hinds hazardous location bodies carry additional prefix codes: "EJB" series for explosionproof Form 7 and Form 35 bodies, "EZS" for sealing fittings. Their "Condulet" trademark covers the entire conduit body line, but procurement systems usually list them by the alphanumeric part number rather than brand terminology.
The "SA" aluminum designation indicates their proprietary copper-free aluminum alloy meeting ASTM B85 Grade 356 specifications, designed for corrosion resistance in coastal or chemical environments. Standard aluminum bodies use 360 alloy, which contains small copper percentages unsuitable for certain chemical exposures.
OZ-Gedney and Alternative Manufacturer Systems
OZ-Gedney (now part of Emerson but maintaining separate product lines) uses a hybrid approach. Their format: [Body Type]-[Trade Size][Material]-[Feature Code].
Key distinctions in OZ-Gedney nomenclature:
- Trade sizes spelled out as fractions or decimals rather than coded (e.g., "LB-3/4" instead of "LB67")
- Material designation separated by hyphen: "-IRN" for iron, "-AL" for aluminum, "-MAL" for malleable iron
- Cover options as suffixes: "-C" for cover only, "-GC" for gasket and cover
Example: LB-3/4-AL-GC = LB body, 3/4-inch, aluminum with gasket and cover. This verbose system actually simplifies cross-referencing since the part number self-documents completely.
Other manufacturers like Killark (Hubbell) and Thomas & Betts follow similar patterns with proprietary variations. Killark adds "GUE" and "GUA" prefixes for explosionproof malleable iron and aluminum bodies respectively. Thomas & Betts uses a model/series number approach (e.g., "Series 370" for aluminum bodies) requiring catalog lookup rather than self-decoding part numbers.
When sourcing across these brands, focus on matching these core specifications: body type, trade size, material (especially copper content for chemical locations), hub style (threaded vs. threadless), and hazardous location ratings if applicable. Need help cross-referencing? Request a quote with your existing part number and we'll identify compatible alternatives.
Hub Configuration and Special Features
Beyond basic body type, hub configuration drives compatibility with your existing raceway. Part numbers encode this critical specification:
Threaded vs. Threadless Hubs
Standard conduit bodies ship with female threaded hubs (NPT taper threads per ANSI B1.20.1). These accept male threaded rigid conduit, IMC, or threaded fittings. The absence of hub designation in most part numbers indicates threaded hubs.
Threadless hubs (setscrew or compression type) appear as suffixes: "M" (Myers/setscrew), "SS" (setscrew), or "COMP" (compression). These mate directly with EMT or allow field-installable compression connectors. Per NEC 358.42, threadless fittings must be specifically listed for the raceway type.
Explosionproof and Hazardous Location Features
Part numbers for Class I, Division 1 locations (NEC Article 501) include form designations:
- Form 7: Cast construction with threaded entries, suitable for Class I, Division 2 and some Division 1 applications per NEC 501.10(B)
- Form 8: Fully explosionproof for Class I, Division 1 per NEC 501.10(A), requires sealing fitting within 18 inches per NEC 501.15
- Form 35: Similar to Form 7 but specifically designed for reduced installation depth
These bodies cost 3-5x standard models due to casting tolerances, thread engagement requirements (minimum five threads per UL 886), and third-party certification testing. Don't substitute standard bodies in hazardous locations—the part number must explicitly state the form rating.
Cover and Gasket Variations
Codes "G", "CG", or "GC" indicate gasket inclusion. Standard covers provide environmental protection to NEMA 3R (raintight when mounted per manufacturer instructions). The gasket—typically neoprene or EPDM—provides the actual seal. Covers without gaskets meet NEMA 1 (indoor, general purpose) only.
Some specialized covers include:
- Feed-through covers: Smooth plate without opening, for pulling conductors through without access (suffixes like "FT" or "BLANK")
- Sight windows: Polycarbonate viewing port (rare, typically custom order)
- Ground screw provisions: Standard on metal bodies per NEC 250.8, some part numbers specify "GS" for reinforced ground screw boss
Check our complete conduit body specifications for NEMA rating comparisons across body styles and materials.
Practical Cross-Reference Strategy
When you're holding a part number from one manufacturer and need an equivalent from another, follow this procedure:
- Decode body type and trade size using the patterns above—this gives you the baseline specification
- Identify material requirements: Does the application require aluminum, copper-free alloy, or is malleable iron acceptable? Check for corrosive environments or electrical grounding considerations (NEC 250.118 lists acceptable equipment grounding conductor types)
- Confirm hub style: Threaded hubs won't work with EMT without additional fittings; threadless won't work with rigid without adapters
- Match environmental rating: NEMA 3R minimum for exterior, NEMA 4X for corrosive or wash-down areas, hazardous location forms where required by NEC Article 500-517
- Verify dimensional compatibility: While trade sizes standardize the hub openings, body envelope dimensions vary—check clearances for tight installations
Create a cross-reference spreadsheet with columns for: manufacturer, part number, body type, trade size, material, hub type, gasket included, hazardous rating, and NEMA rating. This becomes your master specification document for recurring procurement.
Most distributors, including Conversions Tech, maintain cross-reference databases linking common part numbers across manufacturers. When time matters, providing your existing part number to procurement staff gets you equivalent options faster than describing the application. Submit your specifications for multi-manufacturer quote comparisons.
Frequently Asked Questions
Can I substitute an aluminum conduit body for a malleable iron one?
Generally yes for non-hazardous locations, but verify grounding continuity. NEC 250.118(5) requires supplementary equipment grounding conductors with aluminum raceways in some installations. Aluminum bodies are lighter and resist corrosion better, but malleable iron provides superior impact resistance. In hazardous locations, substitution requires matching the form rating and material specifications exactly as listed on the certification.
What does the "copper-free" aluminum designation mean and when does it matter?
Copper-free aluminum alloys (typically 356 or 360 with <0.6% copper) prevent galvanic corrosion in contact with dissimilar metals and resist certain chemical environments. Standard aluminum alloys contain 2-4% copper. This matters in marine, chemical processing, and water treatment facilities where copper sensitivity exists. The part number suffixes "CF" or "CG" typically indicate copper-free composition meeting ASTM B26 specifications.
How do I identify if a conduit body is rated for hazardous locations?
Check for explicit form designations (Form 7, Form 8, Form 35) in the part number or stamped on the body itself. Hazardous location bodies must have third-party certification marks (UL, CSA, FM Approvals) with the class, division, and group clearly marked. Never assume a heavy-duty body is explosionproof—NEC 500.8(B) requires listed and marked equipment. If the part number lacks "EJ", "Form", or explicit Class/Division codes, it's not rated for hazardous locations.
Why do some conduit bodies have three different trade sizes in the part number?
You're looking at a reducing body—typically T or X configurations where the branch outlet differs from the run-through size. Example: "T-1-3/4-3/4" indicates a tee with 1-inch run-through and two 3/4-inch branches. These specialty bodies avoid the cost and labor of multiple standard bodies plus reducing bushings. The largest size appears first in the part number, followed by branch sizes.
Are covers interchangeable between manufacturers?
Rarely. While body types are standardized, cover bolt patterns, gasket grooves, and envelope dimensions vary between manufacturers. Even the same trade size from Appleton and Crouse-Hinds typically won't interchange covers. Some manufacturers offer universal blank covers for feed-through applications, but gasketed covers require exact matches. Order covers as part number-specific accessories, not generic trade size items.
Get a Quote
Navigating conduit body part numbers across manufacturers doesn't have to slow down your procurement cycle. Conversions Tech maintains deep inventory across Appleton, Crouse-Hinds, OZ-Gedney, and alternative brands with cross-reference support to match your existing installations or spec requirements. Whether you're matching a legacy part number or need hazardous location alternatives, our technical team decodes the alphanumeric maze so you get the right body, hub style, and rating the first time. Request your quote now with existing part numbers or application specifications—we'll provide matched options with availability and pricing within 24 hours.
