Johns Manville #14 All Purpose Drilling Screws, 10 in., 500 Per Box

The Johns Manville All Purpose Drilling Screw is a #14 diameter, 10 in. long self-drilling fastener supplied 500 per box. Its extra length is used in commercial low-slope roofing to fasten thick insulation and cover boards through to the structural deck in a single screw.

Key Features:

• Extra-long 10 in.: The 10 in. length fastens very thick insulation build-ups in one pass.
• #14 diameter: A #14 shank provides robust holding strength for heavy-duty attachment.
• Self-drilling: Listed in the self-drilling screw category, it drills and taps steel deck as it drives.
• All purpose: Designed as an all-purpose fastener for varied commercial roofing attachment tasks.
• 500 per box: One box contains 500 screws for mid-size jobs.

Specifications Table:

Coverage & How Much You Need:

Coverage is set by the fastening pattern; with long screws like this, count exactly how many fasteners your uplift specification requires per board, since using a longer screw than needed is costly, and one box of 500 screws serves a moderate area at typical densities.

Fit and Compatibility:

Intended for use with Johns Manville low-slope roofing insulation and membrane assemblies; verify total insulation thickness and deck type so the 10 in. length is appropriate. Plates, insulation and membranes are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included in one box?
A: One box containing 500 Johns Manville #14 x 10 in. all purpose drilling screws.

Q: Is a 10 in. screw right for my job?
A: Only if your total insulation plus board thickness plus required deck embedment approaches that length; measure the build-up and choose the shortest screw that still embeds properly in the deck.

Q: Do these need pre-drilling?
A: No, as self-drilling screws they cut their own hole in steel deck when driven with a suitable screwgun.

Q: Can they be used with plates?
A: Yes, long roofing screws are commonly paired with insulation plates; confirm the plate size and combination with the JM system specification.

Q: What drives them?
A: A heavy-duty screwgun or auto-feed fastening tool rated for long self-drilling roofing screws.

Expert Verdict Reviewed by the SuperArbor Pro Desk

These long self-drilling screws are the right choice where multiple insulation layers stack up and one fastener must reach the deck; always confirm total build-up thickness before ordering a length this long. Drive with the screwgun square to the deck and set to depth to avoid stripping, and pair with the plate size called out in the JM specification.

Long fasteners can whip or eject if the tool binds; wear eye protection and keep hands clear of the drive path.

Order Johns Manville #14 x 10 in. all purpose drilling screws for deep insulation attachment.