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M-Clips™ Roof Panel Clip System

M-Clips stay hidden with no visible fasteners to hold standing-seam roof panels together. We offer two types of clips made from premium 18- 26-gauge steel that are completely free of burrs, preventing rust and other corrosion problems. M-Clips will not fail under extreme heat, ice, rain or wind. In fact, standing seam roofs with M-Clips reduce leaks and last 2–3x longer than typical roofs.

M-Clips — Mechanical Seam

Our heavy-duty fixed mechanical seam clips withstand the harshest environments. The slider assemblies for panels over 40′ are designed to allow for thermal expansion between the panels during intense hot or cold temperatures.

M-Clips — Snap Lock

Our hard-working snap lock clips make attaching roof panels a snap. Use Marco screws to secure and simply snap your roof into place.

More Fasteners

Learn about our other fastener products featuring Marco’s tested-tough performance.
Manufacturer Panel Name Clip Name Standard Alternate Gauges
Englert - A1300 Mechanical Seam Standard 1-5/8" Fixed Clip MRC-107 MRC-128 - Slider Assembly 24
Englert - A1301 Mechanical Seam Special 1-1/8" Fixed Clip MRC-105 MRC-205 - Slider Assembly 24
Englert - S2500 Mechanical Seam 2-1/8" Fixed Clip - N MRC-108 MRC-129 - Slider Assembly 24 / 22
ESE - 1" Mechanical Seam 1-1/8" Fixed Clip MRC-105 MRC-205 - Slider Assembly 24
ESE - 1-1/2" Mechanical Seam 1-5/8" Fixed Clip MRC-107 MRC-128 - Slider Assembly 24
Knudson - KR-24 1.5" Mechanical Seam 1-5/8" Fixed Clip MRC-106 MRC-134 - Slider Assembly 24
Knudson - KR-24 2" Mechanical Seam 2-1/8" Fixed Clip - N MRC-108 MRC-129 - Slider Assembly 24 / 22
Metal Forming - 1" Mechanical Lock 1-1/8" Fixed Clip MRC-105 MRC-205 - Slider Assembly 24
Metal Forming - 1.5" Mechanical Lock / Quadra Pro - TM 1-5/8" Fixed Clip MRC-107 MRC-128 - Slider Assembly 24
Metal Forming - 2" Mechanical Lock / Quadra Pro - TM 2-1/8" Fixed Clip MRC-145 MRC-146 - Slider Assembly 24 / 22
New Tech - SS100 Mechanical Seam 1-1/8" Fixed Clip MRC-105 MRC-205 - Slider Assembly 24
New Tech - SS150 1.5" Mechanical Seam 1-5/8" Fixed Clip MRC-107 MRC-128 - Slider Assembly 24
New Tech - SS200P - 2" Mechanical Seam 2-1/8" Fixed Clip - M MRC-108 MRC-129 - Slider Assembly 24 / 22
New Tech - SS210A - 2" Mechanical Seam/strong> 2-1/8" Fixed Clip - M MRC-109 MRC-144 - Slider Assembly 24 / 22
Roll Former - VS-150 1" Mechanical Seam 1-1/8" Fixed Clip MRC-105 MRC-205 - Slider Assembly 24
Roll Former - VS-150 1-1/2" Mechanical Seam 1-5/8" Fixed Clip MRC-107 MRC-128 - Slider Assembly -
Roll Former - VS-150 1-1/2" Mechanical Seam Plus 50 Profile 1-5/8" Fixed Clip MRC-107 MRC-128 - Slider Assembly 24

QuikGrip Ultra Pro 20 Metal2Wood HD Specs
This is your heavy-duty fastener designed to withstand the stresses of demanding applications. EPDM rubber is bonded to the steel washer to prevent delaminating, forming a superior seal—even when driven at an angle. The 5/16" HWH with bonded sealing washer covers the existing hole completely, creating a watertight seal, even if stretched out by movement of the metal roof. And like our standard Metal2Wood fastener, mechanical zinc plating provides extended corrosion resistance.

Size Head Carton Qty Weight/M
14 x 1" 5/16" HWH 2500 8.250
14 x 1-1/2" 5/16" HWH 2000 10.321
14 x 2" 5/16" HWH 1500 12.495
Pull Out Strength (LBS ULT)
Substrates
PLYWOOD OSB SOUTHERN PINE SPRUCE PINE FIR OAK HEMLOCK FIR
3/4" 5/8" 1/2" 7/16" 1" 1-1/2" 1" 1-1/2" 1" 1" 1-1/2"
858 420 436 300 832 1620 774 1387 - 1014 1579
Point Diameter Major Diameter Minor Diameter Head Across Flat Nominal Tensile Minimum Torsional Nominal Shear
30º TYPE 17 .245 / .248 .178 / .185 .305 / .312 4272 LBS. 125 IN-LBS. 2995 LBS.
Pull Over Strength (LBS ULT)
Material
Designation AZ55 Galvalume 90 Galvanized
NOM. GAUGE 29 26 24 22 20
THICKNESS .015 .019 .024 .032 .038
14mm x .590 759 696 1190 1310 1585
Washer Sizes
#10 HiLo
ID OD
.275" .590"
Manufacturer Panel Name Clip Name Standard Alternate
Englert - A1500 Snap Lock 1-1/2" Snap Lock Clip MRC-112 MRC-115 - Heavy Duty 3-1/2" Base
Englert - S2000 Snap Lock 1-3/4" Snap Lock Clip MRC-100 MRC-113 - Heavy Duty 3-1/2" Base
Metal Forming - 1" Snap Seam / Quadra Pro - TM 1-1/2" Snap Lock Clip MRC-130 -
Metal Forming - 1.5" Snap Seam / Quadra Pro - TM 1-1/2" Snap Lock Clip MRC-112 MRC-115 - Heavy Duty 3-1/2" Base
Metal Forming - 1.75" Snap Seam / Quadra Pro - TM 1-3/4" Snap Lock Clip MRC-101 MRC-114 Heavy Duty 3-1/2" Base
New Tech - SS675 - 1-3/4" Snap Lock 1-3/4" Snap Lock Clip MRC-101 MRC-114 - Heavy Duty 3-1/2" Base
Zimmerman - SL-1000 1" Snap Lock 100 SLZ - Snap Lock MRC-103 -
Zimmerman - SL-1500 Heavy Duty 1-1/2" Snap Lock 00 SLZ - Snap Lock MRC-103 -
Zimmerman - SL-1750 1-3/4" Snap Lock 1-3/4" Snap Lock Clip MRC-101 MRC-114 - Heavy Duty 3-1/2" Base