Round Combo Head Machine Screw Zinc

Round Combo Head Machine Screw Zinc

Coil Thread Hex Nut Plain

Coil Thread Hex Nut Plain

ELCO® Hex Washer Tap-Flex Thread Forming Structural Screw Stalgard

Tap-Flex structural fasteners are thread-forming screws that are dual heat treated, self-tapping fasteners that provide the strength, ductility, and resistance to embrittlement failures required in critical curtain wall and dissimilar metal applications. Tap-Flex fasteners are engineered to replace nut and bolt assemblies and Taptite® fasteners commonly used in building construction.

In stock
Total
Grouped product items
AF Part No. Item Elco # Drill Bit Size (in.) Price More Info Qty
2ESU310 3/8-16 x 1-1/2 ELCO® Hex Washer Tap-Flex Structural Screw ESU310 11/32
$67.80
($0.68/Unit)
Volume Discounts
100
2ESU320 3/8-16 x 2 ELCO® Hex Washer Tap-Flex Structural Screw ESU320 11/32
$79.85
($0.80/Unit)
Volume Discounts
100
2ESU330 3/8-16 x 2-1/2 ELCO® Hex Washer Tap-Flex Structural Screw ESU330 11/32
$44.93
($0.90/Unit)
Volume Discounts
50
2ESU410 1/2-13 x 1-1/2 ELCO® Hex Washer Tap-Flex Structural Screw ESU410 15/32
$125.00
($2.50/Unit)
Volume Discounts
50
2ESU420 1/2-13 x 2 ELCO® Hex Washer Tap-Flex Structural Screw ESU420 15/32
$142.50
($2.85/Unit)
Volume Discounts
50
2ESU430 1/2-13 x 2-1/2 ELCO® Hex Washer Tap-Flex Structural Screw ESU430 15/32
$160.00
($3.20/Unit)
Volume Discounts
50
2ESU510 5/8-11 x 1-1/2 ELCO® Hex Washer Tap-Flex Structural Screw ESU510 19/32
$86.25
($3.45/Unit)
Volume Discounts
25
2ESU530 5/8-11 x 2-1/2 ELCO® Hex Washer Tap-Flex Structural Screw ESU530 19/32
$113.75
($4.55/Unit)
Volume Discounts
25
Total

FEATURES

  • Hex washer Head with underhead serrations
  • E-Form five-lobe thread forming overcomes friction build-up and reduces drive torque
  • Grade 5: Meets ASTM A449 specifications (120 ksi strength)
  • Silver Stalgard® SUB coating provides 2000 hours of salt spray resistance (per ASTM B117)
  • Eliminates thread-tapping operations
  • Roll forms own work-hardened thread to resist loosening cause by vibration or thermal changes
  • Well-suited for metal applications such as steel and aluminum
  • Flex Technology heat treat provides required strength and ductility
  • Virtually immune to delayed embrittlement failures
  • Accept standard nuts and washers if required
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