Hobson performance data
14-14 Bi-Metal 304 Stainless Hex Flange Self-Drilling Screw: Performance Data
Hobson's two-page DRiLLX performance data sheet for its bi-metal 304 stainless self-drilling screw with a flanged hex head, 14 gauge x 14 TPI. It gives pull-out values in steel purlin, drill test and strength results, and the five lengths from T4XMXHH1414025 to T4XMXHH1414095.
What this covers
- Applications
- Material and finish
- Pull-out values
- Drill test and strength
- Sizes and part numbers
- Installation
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- Metal to metal fixing for marine and corrosive conditions: cladding metal sheets, signs, fences and sheds.
- Bi-metal construction: A2 stainless body with a heat treated high carbon steel drill point, finished with Hobson's R1000 hours protective coat.
- Five lengths, all 14-14 with a 3/8 inch hex drive and packs of 500: 25, 35, 52, 70 and 95mm (T4XMXHH1414025 to T4XMXHH1414095).
- Working pull-out load in purlin: 360N in 0.8mm G2, 1,310N in 1.5mm G550, 2,660N in 2.5mm G450 and 2,270N in 2.9mm G2.
- All pull-out figures are from laboratory tests on Hobson's DRiLLX screws; the working loads already include a factor of safety of 2.5 for steel.
- Characteristic shear strength 8,330N and characteristic tensile strength 13,890N; torsional strength 10.9Nm.
- Install with a cordless screwdriver at 2,200 to 3,000 RPM, keep firm, steady pressure while it drills, and do not overtighten.
Who it helps: Builders and fabricators fixing sheet or brackets to steel in coastal or corrosive spots, and engineers checking pull-out values.
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This document is published by Hobson Engineering, who supply this range to us. We show it here in full so you can read it next to the product; the summary above is ours. Read it on this page or download the PDF. For the most current version, ask us.