J and J's premium line of self-drilling fasteners, the ZAC™ Self Driller hex head is a strong, uniform zinc cap that withstands the toughest installation conditions and comes with a limited lifetime warranty for superior corrosion protection on the head of the fastener. Features include a thick EPDM seal washer, galvanized shank plating and a precision-forged self-drilling point for metal-to-metal applications up to 8-gauge steel. 5/16” or 3/8” head style/size depending on drill point size. Also available painted to match panel colors.

    #12-14 Self Driller 3

  • Head Style/Size:5/16” Hex
  • Point:SD3
  • Washer:Thick EPDM Seal Washer
  • Sizes:1”, 1-1/4” 1-1/2”, 2”, 2-1/2", 3”
  • Other:Drill & Tap up to .035 – .210"

    #12-24 Self Driller 5

  • Head Style/Size:3/8” Hex
  • Point:SD5
  • Washer:Thick EPDM Seal Washer
  • Sizes:1-1/2"
  • Other:Drill and Tap up to 1/2"

    #14 ZAC Tapper Replacement

  • Head Style/Size:5/16” Hex
  • Point:SD2/SD3
  • Washer:Thick EPDM Seal Washer
  • Sizes:1-1/2”, 1-1/4"
  • Other:Drill & Tap up to .050 – .210"

    1/4-14 Stitch Self Driller 1

  • Head Style/Size:3/8” or 5/16” Hex
  • Point:SD1
  • Washer:Thick EPDM Seal Washer
  • Sizes:7/8”
  • Other:Tap up to .030” – .095”


    1/4-14 Self Driller 2

  • Head Style/Size: 5/16” AFH Hex
  • Point:SD2
  • Washer:Thick EPDM Seal Washer
  • Sizes:1-1/2"
  • Other:Drill & Tap up to .050 – .150"

    1/4-14 Self Driller 3

  • Head Style/Size:5/16” HWH
  • Point:SD3
  • Washer: Thick EPDM Seal Washer
  • Sizes:1-1/4"
  • Other:Drill and Tap Up to .050-.210"

Contact Us

  • Head Office: 364 Recker Hwy, Auburndale, FL 33823, USA

  • Phone: +1 813-754-0771

  • Email: info@jnjwelding.com

  • Manufacturing Sites: View our Google Map

Auburndale Location

Panama City Location

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