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Johns Manville 4 in #14 All Purpose Roofing Fasteners, Grey, 1,000-Count Carton
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Johns Manville 4 in #14 All Purpose Roofing Fasteners, Grey, 1,000-Count Carton
These Johns Manville All Purpose Fasteners are 4 in. #14 Phillips-head screws for fastening through thick insulation stacks in commercial roofing assemblies. The grey steel screws ship in a 1,000-piece carton and pair with JM insulation, cover boards and membranes in mechanically attached systems.
Key Features:
- Long reach: 4 in. length fastens through multi-layer insulation stacks to the deck.
- All purpose design: General-purpose screw for JM commercial roofing attachment.
- Phillips drive: Phillips head drives with standard roofing screw-gun bits.
- #14 shank: Heavy #14 size provides strong holding power.
- FM Approved: FM Approved for approved roofing assemblies.
- Miami-Dade Approved: Miami-Dade County Approved for high-wind region work.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 carton of 1,000 fasteners |
| Product line | Johns Manville All Purpose Fasteners |
| Material | Steel |
| Color | Grey |
| Length | 4 in. |
| Fastener size | #14 |
| Drive type | Phillips |
| Pack quantity | 1000 pieces per carton |
| Approvals | FM Approved; Miami-Dade County Approved |
| Intended use | Mechanical attachment of commercial roofing insulation and components |
| Weight | 34 lb per carton |
Coverage & How Much You Need:
Coverage depends on the fastening pattern in your specification; a 1,000-piece carton supports a large area of a mechanically fastened roof with thick insulation. Follow fastener spacing per the JM assembly drawing for your deck and wind zone.
Fit and Compatibility:
Use with Johns Manville commercial roofing insulation, cover boards and membranes where a 4 in. fastener length is specified. Other lengths in the #14 All Purpose series and JM fastening plates are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One carton with 1,000 grey steel 4 in. #14 Phillips-head All Purpose Fasteners.
Q: When do I need a 4 in. fastener?
A: Use it when the combined thickness of insulation or cover board layers requires the longer reach to reach required deck embedment.
Q: Are they high-wind approved?
A: Yes, they are FM Approved and Miami-Dade County Approved per the listing; the specific assembly must also be approved.
Q: What material are they?
A: Steel with a grey finish.
Q: What driver do they take?
A: A standard Phillips-head bit.
Q: Are plates included?
A: No; JM fastening plates are sold separately.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Reserve the 4 in. length for deep assemblies, such as multiple insulation layers or tapered systems stacked over the deck. Confirm the embedment depth called out on the JM assembly drawing before ordering, since over-long fasteners can deflect or puncture. Install with a screw gun set to seat flush without stripping the Phillips head.
Long roofing screws have sharp points and can deflect on hard decks; wear gloves and eye protection and follow the manufacturer's installation instructions and local code.
Order the Johns Manville 4 in. #14 All Purpose Fasteners 1,000-count carton for thick-insulation roof assemblies.
Product Documents:
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