T40 Drive Screws | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

5/16"-18

5/16"-24

3/8"-16

	Drive Style Drive Style


Tamper- Resistant Torx	Torx	Torx Plus

	Size Size	Show

T40

	Size Size	Hide

	Length Length

	Head Type Head Type


Rounded	Flat

	Material Material

Stainless Steel

Steel

	Finish Finish

	Rounded Head Style Rounded Head Style


Pan	Button

	Head Diameter Head Diameter

	Threading Threading

	Fully Threaded
	Partially Threaded

	Thread Pitch Thread Pitch

1.25 mm

	Thread Type Thread Type

Metric

UNC

UNF

	Tensile Strength Tensile Strength

	Screw Size Screw Size

5/16"

3/8"

	Head Height Head Height

	Thread Direction Thread Direction

	Right Hand

	Thread Spacing Thread Spacing

Coarse

Fine

	Specifications Met Specifications Met

ASME

ASTM

ISO

	Fastener Strength Grade/Class Fastener Strength Grade/Class

	Class 8.8

	Hardness Hardness

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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101 Products

Rounded Head Screws

Metric 18-8 Stainless Steel Button Head Torx Screws

18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. A Torx drive has more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

18-8 Stainless Steel Button Head Torx Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx and Torx-Plus drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Metric Steel Button Head Torx Screws

The Torx or Torx-Plus drive on these metric screws have more points of contact than other drives, allowing you to tighten them without damaging the recess.

Alloy Steel Button Head Torx Screws

Made from alloy steel, these screws are three times stronger than standard steel button head Torx screws. A Torx-Plus drive has more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Metric Steel Pan Head Torx Screws

These metric screws have a Torx drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Stainless Steel Tamper-Resistant
Button Head Torx Screws

These 18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Metric Stainless Steel Tamper-Resistant
Button Head Torx Screws

Made from 18-8 stainless steel, these metric button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Metric Alloy Steel Tamper-Resistant
Button Head Torx Screws

Nearly twice as strong as stainless steel button head screws, these metric screws are made from alloy steel. Their tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Flat Head Screws

Alloy Steel Torx Flat Head Screws

Made from alloy steel, these screws are twice as strong as standard steel Torx flat head screws.

Metric High-Strength A286 Stainless
Steel Torx Flat Head Screws

These metric A286 stainless steel screws have comparable strength to alloy steel with the corrosion resistance of 18-8 stainless steel.

Steel Torx Flat Head Screws

Lower strength than alloy steel, use these screws for light duty fastening.

Tamper-Resistant Torx Flat Head Screws

With a tamper-resistant Torx or Torx Plus drive (also known as a pin-in Torx or Torx Plus drive), these screws are difficult to remove without special tools.

Tapping, Wood, and Drywall Screws

Torx Flat Head Thread-Cutting Screws for Metal

A Torx drive has more points of contact than a Phillips drive, allowing you to apply extra force with less slippage or damage to the recess.

Thread-Forming Screws for Joining Wood to Metal

Thread-forming screws press threads into drilled holes for a tight vibration-resistant assembly.