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MPN UFO-CL-01-B1 | Single-Piece Universal Fastening Object | 30–48mm Frame Height | Mid Clamp | Converts to End Clamp with Stopper Sleeve | UL 2703 Integrated Grounding | Black Finish | 25-Year Warranty
The IronRidge UFO-CL-01-B1 is the black-finish version of IronRidge's UFO® (Universal Fastening Object) — a single-size, single-piece module mid clamp engineered to quickly and securely bond solar modules to IronRidge XR Series rails while simultaneously establishing the UL 2703 listed module-to-rail electrical bonding path. The UFO's circular clamp head, 360° bonding washer, and integrated Nylok T-bolt deliver a truly universal fastener: one clamp SKU covers every module frame height from 30mm to 48mm, eliminating the need to stock multiple clamp sizes for different module specifications. The UFO ships fully assembled and fully lubricated — ready to drop into the XR rail T-slot, self-stand while modules are positioned, and spin down to a finished torque in seconds. When a Stopper Sleeve is snapped onto the UFO's outboard side, the same clamp converts from a mid clamp to a fully rated end clamp — making the UFO-CL-01-B1 the only clamp SKU needed for both mid and end positions in an XR rail installation. The black finish matches dark-frame and all-black solar modules for a clean, low-visibility racking aesthetic. Backed by IronRidge's industry-leading 25-year product warranty.
Truly Universal — One Clamp for 30–48mm, Mid and End: The UFO® covers every standard solar module frame height from 30mm to 48mm with a single continuously adjustable clamp — eliminating the need to stock separate clamp sizes for thin-frame (32mm), standard (35–38mm), and thick-frame (40–46mm) modules on the same job. Combined with the Stopper Sleeve conversion, the UFO-CL-01-B1 functions as both a mid clamp (without sleeve) and an end clamp (with sleeve), meaning a single clamp part number handles both positions in every row — dramatically simplifying purchasing, inventory, and field logistics for installers working across multiple module brands and specifications.
360° Bonding Washer — UL 2703 Grounding Without Separate Hardware: The UFO's integrated 360° bonding washer is the key to IronRidge's UL 2703 listed integrated grounding system. As the UFO is torqued down, the circular bonding washer makes continuous contact with the module frame anodizing at all points around its circumference — breaking through the anodized aluminum oxide insulating layer to establish a direct metal-to-metal electrical bond between the module frame and the UFO body. The UFO body simultaneously bonds to the XR rail through the T-bolt contact — creating a continuous, multi-path grounding circuit from every module frame through the rail to the structure ground without any grounding lugs, WEEB washers, or supplemental bonding jumpers at any point in the array.
Self-Standing T-Bolt — One-Person Installation: The UFO's long T-bolt features an integrated Nylok patch that grips the rail T-slot walls when inserted — allowing the UFO to stand freely in the rail channel without being held in place while modules are being positioned. This eliminates the conventional two-person clamp installation workflow (one person holds the clamp, another places the module), allowing a single installer to drop UFOs into position along the rail, lay modules between them, and then walk back along the row fastening each clamp without a second set of hands. The Nylok patch also auto-rotates and locks the T-bolt into the correct final position as the clamp is torqued — preventing T-bolt spin during final fastening.
Fully Assembled & Pre-Lubricated — Zero Field Prep: Every UFO-CL-01-B1 ships fully assembled — clamp head, T-bolt, nut, and 360° bonding washer pre-integrated — with factory-applied lubrication on the T-bolt threads. No field assembly, thread lubrication, or component alignment is required before installation. The pre-applied lubricant ensures consistent torque-to-clamping-force across every fastener in the array, preventing under-torque (inadequate bond) and over-torque (module frame deformation) — and dramatically reducing installation time per module position compared to multi-piece clamp systems requiring field assembly.
Black Finish — Aesthetic Match for Dark-Frame Modules: The black finish of the UFO-CL-01-B1 visually aligns with dark-anodized and black-frame solar modules — including most premium bifacial, all-black, and sleek residential modules from major manufacturers — minimizing the visual contrast between the silver clamping hardware and the module frame on completed arrays. When paired with IronRidge's black XR rails (XR-100-168B, XR-10-168B), the UFO-CL-01-B1 enables a fully monochromatic black racking and clamping system for installations where aesthetic uniformity across the roofline is a priority.
Multiple Parallel Grounding Paths — Enhanced System Safety: Because every UFO in an array independently bonds its module frame to the XR rail, the completed installation contains as many parallel grounding paths as there are module clamps — typically 4–8 per module for a standard portrait-mount layout. This redundancy means the grounding system remains fully functional even if one clamp connection becomes compromised due to corrosion, loosening, or mechanical impact — a significant safety advantage over single-path grounding systems where any single failed connection can leave module frames ungrounded.
Note — EFO End Clamp Alternative: IronRidge now offers the EFO™ (End Fastening Object, MPN UFO-END-01-B1 in black) — a dedicated single-piece end clamp designed to eliminate the Stopper Sleeve step. The EFO supports 30–40mm frame heights and torques to 80 in-lbs. For new installations, IronRidge recommends using UFO mid clamps + EFO end clamps as a purpose-built pair. The UFO-CL-01-B1 with Stopper Sleeve remains a fully valid and code-compliant end-clamp solution for all XR rail installations.
| Manufacturer | IronRidge |
| MPN | UFO-CL-01-B1 |
| Product Name | UFO® — Universal Fastening Object | Solar Module Mid Clamp |
| Clamp Function | Mid Clamp (Standard) | Converts to End Clamp with Stopper Sleeve (sold separately) |
| Compatible Frame Heights | 30mm to 48mm (Universal — Single Size Fits All) |
| Compatible Rails | IronRidge XR10 & XR100 Series Rails — Flush Mount, Tilt Mount, Ground Mount |
| Material | Clamp Head: Aluminum | T-Bolt: 300 Series Stainless Steel | Bonding Washer: Stainless Steel |
| Finish | Black Anodized Aluminum |
| Grounding System | 360° Integrated Bonding Washer | UL 2703 Listed — No Separate Grounding Hardware Required |
| Pre-Assembly | Fully Assembled | Factory Pre-Lubricated T-Bolt Threads |
| T-Bolt Feature | Integrated Nylok Patch — Self-Standing in Rail | Auto-Rotates & Locks at Final Torque |
| Installation Torque | 80 in-lbs (9 N·m) |
| Applications | Residential & Commercial Pitched Roof | Tilt Mount | Ground Mount — XR Rail Systems |
| Also Available In | Mill Finish — MPN UFO-CL-01-M1 | Dedicated End Clamp: EFO™ Black — MPN UFO-END-01-B1 |
| Warranty | 25-Year Manufacturer Warranty |
Grounding / Bonding: UL 2703 — Module-to-Rail Integrated Bonding & Grounding System Listed
System Listing Scope: IronRidge Flush Mount, Tilt Mount, and Ground Mount Systems — All XR Rail Applications
NEC Compliance: NEC 2020 §690.43 — Module Frame Bonding | §690.47 — Grounding Electrode System
Building Codes: IBC | IRC — Via IronRidge XR System Pre-Stamped Engineering Letters (Most U.S. States)
T-Bolt Material: 300 Series Stainless Steel — Corrosion-Resistant for Coastal & High-Humidity Environments
Warranty: 25-Year Manufacturer Warranty — Free of Defects in Materials and Manufacturing
● Available | Contact us for lead time and pricing
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