OMG - 2 3/8 Barbed Seam Plate 1000pcs per case

The OMG SPGA238B-B seam plate is a barbed metal “stress plate” used in commercial roofing to fasten single-ply membranes and accessories. The barbs on the plate help grip membranes or insulation layers, resisting pull-through forces. It is constructed of Galvalume-coated or AZ-coated steel to enhance corrosion resistance while serving as a load-distributing plate for fasteners.

Key Features

• Barbed profile for enhanced grip in membrane layers
• Steel body with corrosion-resistant coating
• Round plate design to distribute load evenly
• Compatible with OMG fasteners and systems
• Typically packaged in 1,000-piece cases

• SKU / Cat No: SPGA238B-B
• Description: Barbed metal seam (stress) plate
• Diameter: 2 3/8 in (60.3 mm) (nominal)
• Material: Steel with barbed surface
• Coating / finish: Galvalume® / AZ coating or OEM corrosion-resistive finish (OMG uses AZ55 in its standard plates) 
• Barbs: multiple raised barbs on one face
• Package quantity: 1,000 pcs per case

• Position the plate over the fastening point on the roof membrane or insulation layer.
• Align the barbed face toward the membrane/insulation surface needing grip.
• Drive the compatible fastener through the plate and substrate to secure.
• Ensure the plate sits flush and the barbs engage properly (do not deform).
• Repeat for all fastening locations in the system layout.
• Check periodically for signs of plate distortion or corrosion and replace as required.

Q: What is the nominal diameter of SPGA238B-B?
A: 2 3/8 in (60.3 mm).

Q: How many plates are in a standard case?
A: 1,000 pieces per case.

Q: What kind of coating or finish does the plate use?
A: It is likely Galvalume or AZ-coated steel, consistent with OMG’s steel plate standard.

Q: Why are the barbs included on the plate?
A: The barbs help grip membrane or insulation layers to resist pull-through under wind uplift.

Q: Can it be used with standard OMG fasteners?
A: Yes, it is designed to pair with OMG roofing fasteners.