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4-40 x 3/8" Trilobe Thread Forming Screws for Metal / Phillips / Flat Undercut Head / 410 Stainless Steel

TAPTITE® Brand Generic Alternative.

Product Details

Part Number: 396143 Carton Quantity: 5,000 pcs Carton Weight: 5.65 lbs
4-40 x 3/8" Trilobe Thread Forming Screws for Metal / Phillips / Flat Undercut Head / 410 Stainless Steel Please Note: Item in picture may not reflect size and finish of actual part

Technical Specs

Pricing Information

1-2 Carton Price: $198.75 / Carton of 5,000 pcs ($ 0.03975 Each)
3-4 Carton Price: $187.05 / Carton of 5,000 pcs ($ 0.03741 Each)
5+ Carton Price: $176.65 / Carton of 5,000 pcs ($ 0.03533 Each)

Product Specs

  • Part Number: 396143
  • Product Category: Thread Forming Screws
  • Type / Style: TFS for Metal
  • Size: 4-40
  • Length: 3/8"
  • Head Style: Flat Undercut Head
  • Drive Style: Phillips
  • Head Diameter: 0.191 - 0.212
  • Head Height: 0.038 - 0.047
  • Full / Partial Thread: Full
  • Driver Size: 1
  • Material: 410 Stainless Steel
  • Finish: Plain
  • RoHS: Compliant
  • driver_size: 1
  • head_diameter: 0.191 - 0.212
  • type_style: TFS for Metal

Part # Cross-Reference

  • 0406RPU410

More About Part Number 396143

These 4-40 x 3/8" Thread Forming Screws feature a Flat Undercut Head with a Phillips Drive and are made from 410 Stainless Steel. Thread forming screws create mating threads by displacing material rather than cutting it, making them useful in softer materials where strong thread engagement is desired. Taptite style thread forming screws are designed to reduce driving torque while creating strong mating threads in ductile metals and similar materials. They feature a Plain Finish, meaning no additional surface coating has been applied; this is commonly used where the part will be painted, plated, or used in controlled indoor environments. The Flat Undercut Head sits flush with the surface while reducing material displacement, making it useful in thin materials and layered assemblies. A Phillips drive features a cross-shaped recess designed for efficient installation with standard Phillips drivers and power tools.

⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer.
For more information, go to www.P65Warnings.ca.gov.

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