Hobson performance data
14-14 x 22 Class 3 Hex Flange Head Self-Drilling Screw, 5/16 Inch AF: Performance Data
Hobson's two-page DRiLLX performance data sheet for its 14-14 x 22mm hardened steel hex flange head self-drilling screw with a Class 3 finish and 5/16 inch hex drive, part T9PM3RH1414022. It covers pull-out values in purlin, drill test and strength results, and installation.
What this covers
- Applications
- Pull-out values
- Drill point test
- Mechanical properties
- Dimensions
- 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: wall cladding, fencing and gates, sheds, and hinges into metal posts, gates and doors.
- Hardened C1022 steel with a Class 3 finish. 14 gauge x 14 TPI x 22mm, 5/16 inch hex drive, packs of 1,000 (QFind Q218).
- Working pull-out load in purlin: 400N in 0.7mm G2, 1,650N in 1.5mm G2, 3,300N in 2.5mm G450 and 3,000N in 3.0mm 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 tensile strength 20,850N, characteristic shear strength 12,500N, torsional strength 16.9Nm.
- Install with a cordless screwdriver at 2,200 to 3,000 RPM, keep firm, steady pressure while it drills, and do not overtighten. Impact drivers are not recommended.
Who it helps: Fencers, shed builders and fabricators fixing steel to steel with a short 14g tek screw.
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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.