Panduit COS35-36-Q 2-Hole Copper Mechanical Lug, Single Barrel, 25-Pack
Overview
The Panduit COS35-36-Q is a two-hole, single-barrel copper mechanical connector lug designed for wire terminations where wide wire-range capability matters as much as connection integrity. Manufactured from high-strength electrolytic copper, it handles conductors from #14 to #6 AWG and is cULus Listed for use up to 600V with a 90°C temperature rating — covering the full range of standard branch-circuit and control-wiring termination requirements. If you've ever stocked three or four different lugs to cover a job's wire mix, the COS35-36-Q's broad acceptance range is the spec to look at. Part of Panduit's Pan-Lug™ product line, this lug ships in a 25-piece package (COS35-36-Q, often searched as COS35 36 Q).
Key Features
- High-Strength Electrolytic Copper Construction: Electrolytic copper delivers low bulk resistance and resists oxidation over the long term — critical in panel terminations that won't be revisited for years. Bare finish keeps contact resistance predictable without plating variability.
- Wide Wire Range — #14 to #6 AWG: A single SKU covers six conductor gauges. In mixed-gauge control cabinets or termination panels, that consolidation reduces the number of lug part numbers you need to carry on the truck or in the storeroom.
- Plated Steel Set Screw: The plated steel set screw creates a durable electrical contact between the conductor and the connector body. Plating resists corrosion at the fastener, which is the most common failure point in mechanical lugs exposed to humidity or temperature cycling.
- Internal Pressure Bar and V-Bottom Collar: These two features work together to distribute clamping force uniformly around the conductor rather than concentrating it at the set screw point. Uniform clamping means consistent contact resistance across the wire range — important when you're terminating at the low end (#14) and the high end (#6) with the same lug.
- Two-Hole, Offset Design: The two-bolt mounting pattern distributes mechanical load across two connection points, reducing the risk of rotation under vibration. The offset geometry accommodates tight equipment layouts where a straight lug would conflict with adjacent terminations or bus bar obstructions.
- 3/16" Stud Compatibility: Sized for 3/16" studs, which are common on bus bars, equipment terminals, and ground bars in standard commercial electrical enclosures. Verify stud size before ordering — this is not a 1/4" or 5/16" stud lug.
- 600V / 90°C Rating (cULus Listed): Meets the voltage and temperature thresholds required for standard commercial branch-circuit work. The 90°C rating aligns with THHN/THWN-2 insulation ratings, so you won't be the limiting element in the circuit's temperature rating.
- 25-Piece Package Quantity: Packaged in quantities of 25 — appropriate for a single panel or distribution board. Order multiples for larger jobs; the consistent part number simplifies purchase-order tracking across projects.
- 2.23" Overall Length, 0.55" Height: Compact form factor (2.23" L × 0.55" H / 56.6mm × 14mm) fits standard wire termination sections of commercial panels and wire management enclosures without requiring extra clearance. Verify available depth before specifying in confined equipment.
Integration & Compatibility
The COS35-36-Q is designed for copper conductors only — do not use with aluminum wire. The 3/16" stud size must match the equipment terminal being used; this lug is not interchangeable with 1/4" or 5/16" stud variants in the Pan-Lug line. The #14–#6 wire range makes it suitable for control wiring, branch circuit terminations, grounding applications, and equipment bonding in commercial and light industrial panels. For heavier conductors or higher-ampacity runs, step up to a larger barrel in the Panduit mechanical lug family. Pair with appropriate wire termination tools and torque to the equipment manufacturer's specified value — mechanical lugs are torque-sensitive, and under- or over-torquing both degrade connection quality.
What's in the Box
- 25x Panduit COS35-36-Q 2-hole copper mechanical connector lugs
Frequently Asked Questions
Q: What wire gauge range does the COS35-36-Q accept?
A: The COS35-36-Q accepts copper conductors from #14 to #6 AWG. It is not rated for aluminum wire.
Q: What stud size does the COS35-36-Q fit?
A: The COS35-36-Q is designed for 3/16" studs. It is not compatible with 1/4" or 5/16" stud terminals — verify your equipment stud size before ordering.
Q: What is the voltage and temperature rating for the COS35-36-Q?
A: It is cULus Listed for use up to 600V and temperature rated to 90°C, making it compatible with standard THHN/THWN-2 conductor insulation ratings.
Q: How many lugs come in one package of COS35-36-Q?
A: Each package contains 25 lugs. There is no single-piece or smaller quantity option for this part number.
Q: Can the COS35-36-Q be used for grounding and bonding applications?
A: Yes. The two-hole copper construction and cULus Listing at 600V/90°C make it suitable for equipment grounding and bonding terminations, provided the stud size and wire gauge are within the specified range.
Q: Is the COS35-36-Q compatible with aluminum conductors?
A: No. The COS35-36-Q is rated for copper conductors only. Use a lug specifically rated for aluminum or copper-aluminum (AL/CU) when terminating aluminum wire.
The COS35-36-Q earns its place in commercial panel work because of one specific combination: a #14–#6 wide wire range in a single two-hole offset lug body. When you're pulling wire in a mixed-gauge control or distribution section, having one SKU that handles the full range of your branch conductors is a real time saver — fewer part numbers, one package on the shelf.
Technical Highlights:
- Electrolytic Copper, Bare Finish: Bare electrolytic copper gives you predictable, low-resistance contact without the variability that comes from plating wear. For long-term panel terminations that sit unserviced, that matters.
- cULus Listed, 600V / 90°C: The 90°C temperature rating matches THHN/THWN-2 wire ratings directly — the COS35-36-Q won't be the limiting component in the circuit's thermal rating.
- Internal Pressure Bar + V-Bottom Collar: These two features together provide uniform conductor clamping, not just a point-contact from the set screw. That's what keeps contact resistance consistent whether you're terminating #14 or #6 — the extremes of the range.
Deployment Considerations:
- The 3/16" stud size is specific — verify your bus bar or equipment terminal before pulling this lug from the box. Stud-size mismatches at termination are a common field error that wastes time and packages.
- Mechanical lugs are torque-sensitive. The two-hole design distributes load and resists rotation, but the set screw still needs to be torqued to the equipment manufacturer's spec — over-torquing can deform the barrel on smaller conductors at the #14 end of the range.
The COS35-36-Q is the right call for commercial electrical contractors terminating mixed-gauge copper conductors at 3/16" stud terminals in standard branch-circuit or control-wiring panels — particularly where you want to carry one lug SKU across a job's full wire range rather than split-stocking multiple sizes.
