Product Summary

Longze Solar Mid Clamps are high-precision internal fastening components designed to secure two adjacent solar modules to the mounting rails. Engineered from high-tensile AL 6005-T5 Aluminum,

these Universal Inter Clamps provide a uniform clamping force and integrated electrical bonding, ensuring the structural and electrical integrity of your entire PV array.

• ✔ High-Tensile AL6005-T5: Specifically tempered to resist deformation under high-torque fastening, ensuring the modules stay secure during extreme wind vibration.
  
  

• ✔ Integrated Grounding: Features specialized serrated pins or "teeth" that pierce the module's anodized layer, providing seamless electrical bonding for lightning protection.
  
  

• ✔ Multi-Module Compatibility: Designed to fit all standard module frame thicknesses from 30mm to 50mm, ensuring a flush, professional finish for rooftop and ground-mount systems.

• Standards: DIN 6923, ISO 4161, ASME B18.16.4.
  
  

• Material: Aluminum Alloy 6005-T5 / Stainless Steel 304 (Bolt).
  
  

• Surface Finish: Clear Anodized (12μm+) / Black Anodized / Powder Coated.
  
  

• Application: Framed Solar Modules, BIPV Systems, Solar Carports.

Mechanical Properties & Material Hardness

• Certified performance for Solar Mid Clamp components.

• Material Grade	Tensile Strength (Rm)	Yield Strength (Rp0.2)	Hardness (Webster)	Elongation (A50)
  AL 6005-T5	≥ 260 MPa	≥ 240 MPa	≥ 15 HW	≥ 8%
  AL 6061-T6	≥ 290 MPa	≥ 240 MPa	≥ 15 HW	≥ 10%
  SUS 304 (Bolt)	≥ 700 MPa	≥ 450 MPa	140 - 200 HV	≥ 30%

Standard Mid Clamp Specifications

• Precision dimensioning for secure Photovoltaic Module Fastening.

• Frame Thickness	Screw Size	Material Finish	Max Wind Load	Salt Spray Test
  30 mm	M8 x 40/45 mm	12μm+ Anodized	60 m/s	1000+ Hours
  35 mm	M8 x 45/50 mm	12μm+ Anodized	60 m/s	1000+ Hours
  40 mm	M8 x 50/55 mm	12μm+ Anodized	60 m/s	1000+ Hours
  Universal Adj.	M8 x 50 mm	12μm+ Anodized	55 m/s	1000+ Hours

Surface Treatment & Environment Testing

• Ensuring 25-year structural integrity for Solar Mid Clamps.

• Coating Type	Process	Thickness / Test	Best Application
  Clear Anodized	Electrolytic	12μm - 15μm	Standard Racking
  Black Anodized	Aesthetic Finish	800+ Hours	Residential Aesthetics
  Electropolished	Chemical (SS)	Satin Finish	Coastal / Marine

Avoid Pitfalls:

• Incorrect Bolt Length: Using a bolt that is too short prevents full thread engagement with the rail nut, leading to clamp failure. Using a bolt that is too long will "bottom out" in the rail before the Mid Clamp is tight.
  
  

• Overtightening Stress: Do not exceed a torque of 15-18 N.m. Excessive force can cause the aluminum clamp to bow, which creates localized stress points on the solar module glass, potentially leading to micro-
  cracks.
  
  

• Galvanic Corrosion: Never use carbon steel bolts (even zinc-plated) with aluminum Mid Clamps. Always insist on Stainless Steel 304 (A2-70) fasteners to prevent the clamp from corroding and failing within a few years.
  
  

Perfect Fit Assembly:

• Serrated Nut Engagement: Our kits include DIN 6923 Serrated Flange Nuts that lock into the rail channel, ensuring the Mid Clamp remains secure despite thermal expansion and contraction cycles.
  
  

• Alignment Check: Ensure the Solar Mid Clamp is perfectly centered between the two modules. Uneven alignment reduces the clamping surface area on one side, compromising wind-lift resistance.
  
  

Quality Control & Logistics:

• ISO 9001 Certified: 5-step QC including Anodizing Thickness Verification, Thread Go/No-Go Gauge verification, and Load Bearing Simulation.
  
  

• Project Logistics: Available in pre-assembled kits (Clamp + Bolt + Nut + Spring). Bulk packed in reinforced cartons, optimized for export from our Yongnian fastener hub.

Q: Can you provide black mid clamps for residential projects? A: Yes, we offer Black Anodized finishes that provide the same 12μm+ protection with a high-end matte appearance for aesthetic rooftop arrays.

Q: Are your clamps compatible with all rail brands? A: Our Solar Mid Clamps are designed to work with standard T-slotted rails. We can provide custom T-bolts or rail nuts to match your specific profile.