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Johns Manville Highload Fastener, 7 in., 500 Per Pail
Regular price $235.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville Highload Fastener, 7 in., 500 Per Pail
The Johns Manville Highload Fastener is a 7 in. self-drilling screw supplied 500 per pail. It is a long, heavy-duty roofing fastener used to anchor thick insulation build-ups into the structural deck in commercial low-slope roofing assemblies where high loads are specified.
Key Features:
- High-load design: Designed for attachment points where heavy loads are specified in the roofing assembly.
- 7 in. length: The 7 in. length spans multiple insulation layers to reach the structural deck.
- Self-drilling: Categorized as a self-drilling screw, it drills into steel deck as it is driven.
- 500 per pail: Supplied 500 fasteners per pail for larger commercial jobs.
- JM system fastener: From Johns Manville, for use within JM commercial roofing assemblies.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 pail, 500 fasteners |
| Product line | Johns Manville Highload Fasteners Screws |
| Available colors | Blue |
| Available sizes | 7 in. length |
| Material | Steel (self-drilling screw) |
| Length | 7 in. |
| Pack quantity | 500 per pail |
| Intended use | Heavy-load insulation and component attachment in commercial low-slope roofing |
Coverage & How Much You Need:
Coverage depends on the uplift-derived fastening pattern of the roofing system; a pail of 500 fasteners is typically allocated to the high-load perimeter and corner zones, which require denser fastener spacing than field areas.
Fit and Compatibility:
Intended for Johns Manville low-slope roofing assemblies over steel deck where long, high-load fastening is required; confirm the length against total insulation thickness and verify the plate combination with the JM specification. Plates and other components are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included in one sell unit?
A: One pail containing 500 Johns Manville Highload fasteners, 7 in. long.
Q: Where are high-load fasteners used?
A: They are used in roofing zones with higher wind-uplift requirements, such as perimeters and corners, or where the assembly specifies heavier-duty attachment.
Q: Do they need pilot holes?
A: No, they are self-drilling screws and cut their own hole in steel deck when driven with the proper screwgun.
Q: How do I know if 7 in. is long enough?
A: Add up the total thickness of all insulation and boards plus the required deck embedment; 7 in. must exceed that total.
Q: Should I pair them with plates?
A: Follow the JM system specification; high-load zones commonly require a specified plate under the fastener head.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Use Highload fasteners where the system specification calls for heavier attachment, typically in perimeter and corner wind zones, and reserve standard field fasteners for lower-load areas to keep costs in line. Measure total insulation build-up before choosing the 7 in. length and drive square with a depth-set screwgun so heads seat without crushing the insulation.
Long self-drilling screws can bind and eject fragments; wear eye protection and keep the work area clear during fastening.
Order the Johns Manville Highload fastener in 7 in. length to meet your high-load attachment zones.
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