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Pancake Head Screws — Ultra Low Profile Fasteners
Product Overview
Pancake head screws are low-profile fasteners engineered for reliable performance across a wide range of applications. Designed with an ultra-flat, wide-diameter head, they minimize protrusion above the mounting surface while delivering optimal holding strength. These self-tapping screws are widely specified in metal roofing systems for attaching Standing Seam Roof (SSR) clips to metal or wood substrates.
Key Features
- Ultra-low pancake head with taper — only .040" head thickness for a near-flush finish
- #2 square recess drive — positive engagement and reduced cam-out during installation
- #10-9 Gimlet Point self-tapping design — aggressive threading for quick, secure penetration
- Piercing capacity — Carbon Steel & 410 Stainless Steel up to 20 gauge
- Case hardened to finish — consistent hardness and long service life
- Copper roofing compatible — 410 stainless steel option avoids galvanic reaction
ULP (Ultra Low Profile) Series
ULP screws are specifically engineered to attach standing seam roof clips to wood, and are the preferred fastener for clip-less nail hem metal roof panels. Supplied with Ruspert 1,000-hour salt spray coating, ULP screws can be used in treated and fire-treated lumber with confidence.
Material & Coating Options
C1022 Carbon Steel — finished with a long-life coating rated for 1,000 hours of salt spray exposure, providing superior corrosion resistance for demanding exterior applications.
410 Stainless Steel — passivated finish rated for 48 hours of salt spray, ideal for copper roofing systems and environments where stainless performance is required.
Thread & Strength Data
The #10-9 GP screw features a major diameter of .195", minor diameter of .125", and a stress area of .01267 in². Average ultimate pullout strength ranges from 136 lbs in 7/16" OSB up to 813 lbs in 2×4 SYP, with plywood substrates delivering 383–574 lbs depending on thickness.
Special Applications
Beyond metal roofing, pancake head screws are suitable for attaching a variety of materials to steel up to 1/4" thick, making them versatile for architectural panel systems, metal-to-metal framing, equipment mounting, and general industrial fastening where head clearance is limited.
Complementary Product — Snap Lock Panel Clip
For standing seam installations using snap-lock type panels where mechanical seaming is not required, the 1/4" Snap Lock Engineered Panel Clip is the matching companion. Manufactured from high-quality corrosion-resistant steel with tightly controlled tolerances, it allows unlimited thermal movement. Available in 18 gauge (1.2 mm) and 22 gauge (0.8 mm) G-90 galvanized options, with a 1.01" height, 3.50" width, and 2-hole design.
