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SCREWS for Plastics - DELTA PT®

Product Description

DELTA PT® SCREWS optimize thread forming in plastic materials to

  • minimize stress
  • reduce boss size and
  • increase fastening integrity.

The Delta PT thin thread technology for thermoplastics features a newly-designed multi compound 30° flank geometry to provide optimal material flow. Used in a wide range of thermoplastic materials, Delta PT screws offer the following advantages:

  • Better clamp loads
  • Increased joint life
  • Improved vibrational safety
  • Improved dynamic safety by new shear area
  • Higher clamp load at smaller contact pressure
  • Increased flank engagement

Configurations available:

  • Diameters - 1.8mm to 10mm
  • Length - 3mm – 100mm
  • Head Styles - Any
  • Recommended Drives - TORX Plus®, TORX®, ACR®, Phillips II®, Phillips Square-Driv®, Quadrex®, Type 1A, Type 1 (click on chart of drives under image)
Contact EFC for more information icon__arrow
Features & Benefits
  • Stress is minimized on plastic host
  • Joint Life - Increased in both static & dynamic stress
  • Strength - Torsional & Tensional improve by up to 50% for the same nominal diameter
  • Shorter fasteners and smaller diameters
  • Load Distribution - increased head diameter
  • Eliminate Inserts

Stocking Program
EFC stocks the following select parts:

  • 25S9000435-FD1Δ40-1.46X12 FORD S424 120Hrs Salt Spray
  • 25S9000436-FD1 Δ40-1.46X16 FORD S424 120Hrs Salt Spray
  • 25S3000319-G29 Δ50-1.80X12 GMW4205 480Hrs Salt Spray
  • 25S9000437-G18 Δ50-1.80X14 GMW4205 480Hrs Salt Spray
  • 25S3000397-FD4 Δ50-1.80X16 FORD S437 384Hrs Salt Spray
  • 25S9000439-FD4 Δ60-2.14X25 FORD S437 384Hrs Salt Spray

Calculation Program
Delta Calc is a program that can calculate a foregoing dimensioning of the joint. This program aids in the dimensioning of the fastener and assists you in determining the load carrying ability and forecasted life of the joint. Contact an EFC Representative to learn how Delta Calc can benefit your current applications. Contact an EFC Representative at 1-800-888-3326.

Part Number
Download Product Information icon__arrow
Grouped product items
EFC Part Number Thread SizePitch MaxThread LengthDriveHead TypeMajor DiaMaterialFinishColorAutomotive FinishOEM Part Number
25S9000547-FD4D401.4612TORXRound Washer-SteelZincSilver/WhiteS437W790251-S437
25S3000397-FD4D501.816TORX Recess T25Round Washer5ST1022/ ST10B21E-ZN TRIV CR2 LUBSilver/WhiteS437-
25S9000434-FD1D451.6320Unslotted HEXHEX Washer4.5ST1018 TO ST10B22ORG ZNC + WAXBlackS424-
253000193-G19D301.1212T10 TORX RecessRound Washer3Steel.00015 E-ZNC TRIV CR2YellowGMW 3044-
25S9000439-FD4D602.1425TORXRound Washer6SteelZincSilver/WhiteS437-
25S3000319-G29D501.812TORXRound Washer5SteelZincBlackGMW420511611223
253000013-06D401.4512TORX PLUSPAN4SteelZinc---
25S3000582-FD4D301.1210TORXRound Washer-SteelZincSilver/WhiteS437W506922-S437
25S3000397-FD7D501.816TORX Recess T25Round Washer5ST1022/ ST10B21MAGNI 565SilverS439 / MAGNI 565-
25S3000593-S450BD501.810TORX PLUS 25IPPAN Recess5ST1018-ST10B22 STLZinc NickelBlackS450-Black-
25S9000485-FD38D401.4610TORXRound Washer-Steel-BlackS451W506942-S451
25S9000437-G18D501.814TORXRound Washer5SteelZinc NickelBlackGMW 4205-
25S3000318-G19D401.4513TORXRound Washer4SteelElectro ZNCYellowGMW 304411611180
25S3000365-35D301.1212TORX PLUS T0IPPAN3Steel.0003 ZNC-S307-
25S3000424-FD9D501.816Rounded HEX SW7HEX Washer5SteelORG ZincBlackS307-
25S3000593-FD34D501.810TORX PLUS 25IPPAN Recess5ST1018-ST10B22 STLDelta PROTEKT KL100/Delta PROTEKT VH 302 GZSilverS442-
25S9000435-FD1D401.4612TORXRound Washer4SteelORG ZNC /Oil/EcoatBlackS424-
253000377-EFCD602.1420TORX T40PAN6SSChrome FlashBlack-A 000 990 3262
25S9000437-100XBD501.814TORXRound Washer5SteelZinc NickelBlack-11611224 - 06510342AA
25S9000436-FD1D401.4616TORXRound Washer4SteelORG ZNC /Oil/EcoatBlackS424-
253000193-G18D301.1212T10 TORX RecessRound Washer3Steel.0008 ZNC BakeBlackGMW 4205-
253000375-CH26D501.820TORX T25PAN SEM5SteelKL 100 W/ Delta Seal TopcoatBlack--
25S3000593-97D501.810TORX PLUS 25IPPAN Recess5ST1018-ST10B22 STL.0005 ZNC Bake CLR TRIV CR2Silver--

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