Flat Head Undercut Machine Screws | McMaster-Carr

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Flat Head Profile

System of Measurement

Thread Size

Length

Fastener Head Type

Drive Style

Drilled Spanner

Tamper-Resistant Hex

Tamper-Resistant Torx

Tamper-Resistant Torx Plus

Countersink Angle

Material

Stainless Steel

Head Height

Head Diameter

Finish

Threading

Partially Threaded

Screw Size

Tip Type

Thread Type

Drive Size

Specifications Met

Federal Specification

Thread Spacing

DFARS Specialty Metals

Thread Direction

Thread Fit

Metric Class 6g

Unified Standard Class 2A

Unified Standard Class 3A

RoHS

Tensile Strength

40,000 psi to 59,999 psi

60,000 psi to 99,999 psi

100,000 psi or greater

Export Control Classification Number (ECCN)

For Use In

REACH

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694 Products

Flat Head Screws

Stainless Steel Phillips Flat Head Screws

Stainless Steel Phillips Flat Head Screws

Align easily with drivers and resist corrosion

Stainless Steel Hex-Drive Flat Head Screws

Stainless Steel Hex-Drive Flat Head Screws

The most corrosion-resistant hex-drive flat head screws we offer

Steel Phillips Flat Head Screws

Steel Phillips Flat Head Screws

A common drive style that aligns easily with drivers

Steel Hex-Drive Flat Head Screws

Steel Hex-Drive Flat Head Screws

Our strongest hex-drive flat head screws

Sealing Stainless Steel Phillips Drive Flat Head Screws

Sealing Stainless Steel Phillips Drive Flat Head Screws

Keep out dust and contaminants while locking in air and fluid

Stainless Steel Slotted Flat Head Screws

Stainless Steel Slotted Flat Head Screws

The most corrosion-resistant slotted flat head screws we offer

Sealing Tamper-Resistant Torx Stainless Steel Flat Head Screws

Sealing Tamper-Resistant Torx Stainless Steel Flat Head Screws

Prevent unauthorized access while keeping out contaminants and locking in air and fluid

Tamper-Resistant Torx Stainless Steel Flat Head Screws

Tamper-Resistant Torx Stainless Steel Flat Head Screws

Hold up against corrosion, deter unauthorized access, and prevent your driver from slipping

Brass Slotted Flat Head Screws

Brass Slotted Flat Head Screws

Corrosion resistant, conductive, and nonmagnetic with a basic drive style

Steel Torx Flat Head Screws

Steel Torx Flat Head Screws

The deep six-lobe opening prevents your driver from slipping

Brass Phillips Flat Head Screws

Brass Phillips Flat Head Screws

Conductive, nonmagnetic Phillips screws that resist corrosion in humid environments

Steel Slotted Flat Head Screws

Steel Slotted Flat Head Screws

A simple yet effective drive style for light duty tasks

Aluminum Phillips Flat Head Screws

Aluminum Phillips Flat Head Screws

The lightest Phillips flat head screws we offer

Plastic Slotted Flat Head Screws

Plastic Slotted Flat Head Screws

Lightweight, nonconductive, and naturally rust resistant

Aluminum Slotted Flat Head Screws

Aluminum Slotted Flat Head Screws

Our lightest metal slotted flat head screws

Tamper-Resistant Torx Plus Stainless Steel Flat Head Screws

Tamper-Resistant Torx Plus Stainless Steel Flat Head Screws

A secure, tamper-resistant option for corrosive environments

Tamper-Resistant Drilled Spanner Stainless Steel Flat Head Screws

Tamper-Resistant Drilled Spanner Stainless Steel Flat Head Screws

The unique two-hole design deters tampering

Tamper-Resistant Torx Steel Flat Head Screws

Tamper-Resistant Torx Steel Flat Head Screws

Our strongest tamper-resistant Torx flat head screws

Tamper-Resistant Hex-Drive Stainless Steel Flat Head Screws

Tamper-Resistant Hex-Drive Stainless Steel Flat Head Screws

Prevent unauthorized access and damage to components

Tamper-Resistant Torx Plus Steel Flat Head Screws

Tamper-Resistant Torx Plus Steel Flat Head Screws

Our strongest tamper-resistant Torx Plus flat head screws

Other Products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)