Simplex Mega Cap Nails 1-1/4 in. Mill Capped Roofing Nails

Simplex Mega Cap Nails are 1-1/4 in. capped roofing nails with a large 1-5/8 in. head that doubles rupture value, letting you use fewer nails for the same rupture performance. The mill-finish nails feature ring shanks for extra pull-out resistance. Sold by the box and installed with a stand-up tool or hand hammer.

Key Features:

• Doubled rupture value: The original capped roofing nail design uses a large 1-5/8 in. head to double the rupture value.
• Fewer penetrations: Fewer mega cap nails achieve the same rupture performance as standard cap nails, resulting in fewer holes in the base sheet membrane.
• Ring shank grip: Ring shanks provide additional pull-out resistance.
• Fast installation: Installs easily with a stand-up tool or by hand hammer.
• Mill finish: Supplied in a mill finish.
• Bulk nail format: Packaged for bulk fastener use in residential roofing applications.

Specifications Table:

Fit and Compatibility:

Designed for capped fastening of base sheet membranes in residential roofing and works with standard stand-up cap nail tools or hand nailing. Use as part of a complete underlayment or membrane attachment system with compatible cap nail tools.

Frequently Asked Questions (FAQ):

Q: What is included in a box?
A: One box of Simplex Mega Cap Nails, 1-1/4 in. length, in mill finish.

Q: How do these compare to standard cap nails?
A: The large 1-5/8 in. head doubles the rupture value, so fewer nails deliver the same rupture performance and leave fewer holes in the base sheet membrane.

Q: Can I install these by hand?
A: Yes, they can be hand hammered or installed with a stand-up cap nail tool.

Q: Why ring shanks?
A: Ring shanks add pull-out resistance so the fastener holds more securely in the deck.

Q: What projects are these for?
A: They are bulk nails for residential roofing, primarily fastening cap sheet or base sheet membrane.

Expert Verdict Reviewed by the SuperArbor Pro Desk

For tear-off-resistant underlayment attachment, a large-head cap nail like this is a smart choice: the 1-5/8 in. head spreads load and doubles rupture value, so you can reduce fastener density. Pair with a stand-up cap tool for speed on large roofs. Keep spacing per the membrane manufacturer’s wind requirements.

Nail points and cut ends are sharp; wear gloves and eye protection when hand nailing or loading the tool.

Order Simplex Mega Cap Nails 1-1/4 in. for high-holding, low-penetration membrane attachment.