Purlin Fastener

The OMG Purlin Fastener is designed for attaching single-ply membrane systems to structural steel purlins (12-18 gauge) in standing seam metal roof retrofit applications. The OMG Purlin Fastener is available in 3.75-in. to 8-in. lengths. 

Features & Benefits

  • The OMG Purlin Fastener drills through up to 12 gauge steel in seconds.
  • The 3/4-in. drill point allows the fastener to be drilled through the purlin before the threads engage into the the standing seam metal roof.
  • Designed to reduce "jacking" between purlin and standing seam metal.
  • Low profile hex head has a smooth surface to ensure that there is no damage to the membrane.

Physical Data
Ordering Info
Downloads & Videos


The OMG Purlin Fastener must penetrate the purlin a minimum of 1-in. This ensures a minimum of 1/4-in. thread penetration into the structural member. Using a screw gun with a maximum of 1800 RPM, drive the fastener through the purlin until a slight depression is seen around the plate.

Prior to job start, contact OMG to perform a pull out test to determine deck suitability and pullout values.

Note: Caution should be taken not to overdrive the fastener causing stress plate surface to deflect more than 1/16-in. Prior to job bid, contact OMG to visit the job site and inspect the deck.

Physical Data

Thread Diameter: .210-in. (5.3mm)
Head Diameter: .435-in. (11-mm.)
Head Style: 1/4" Hex Head

OMG CR-10 corrosion resistant coating passes the corrosion requirements of FM Approval Standard 4470 and ETAG 006.

Ordering Information

SKULength (in.)Thread Length (in.)PackagingWeight (lbs.)
PUR334 3 3/4 FULL 500 13
PUR434 4 3/4 3 500 16
PUR534 5 3/4 3 500 20
PUR700 7 3 500 24
PUR800 8 3 500 27


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