M4 Thread Rounded Head Screws | McMaster-Carr

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60,000 psi to 79,999 psi

80,000 psi to 99,999 psi

100,000 psi to 119,999 psi

120,000 psi or greater

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656 Products

Rounded Head Screws

Stainless Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Stainless Steel Pan Head Phillips Screws with External-Tooth Lock Washer

External washer teeth grip corrosion-resistant screws better than internal teeth during vibration

Stainless Steel Button Head Hex-Drive Screws

Stainless Steel Button Head Hex-Drive Screws

These button head screws won't rust or corrode when exposed to moisture and chemicals

Stainless Steel Pan Head Phillips Screws

Stainless Steel Pan Head Phillips Screws

These pan head Phillips screws won't rust or corrode when exposed to moisture and chemicals

Stainless Steel Flanged Button Head Hex-Drive Screws

Stainless Steel Flanged Button Head Hex-Drive Screws

Secure thin and soft materials in corrosive environments without needing a separate washer

Steel Button Head Torx Screws

Steel Button Head Torx Screws

With a deep six-lobe opening, these screws prevent drivers from slipping and stripping drives

Steel Button Head Hex-Drive Screws

Steel Button Head Hex-Drive Screws

Made of alloy steel for nearly twice the tensile strength of other steel screws

Brass Pan Head Phillips Screws

Brass Pan Head Phillips Screws

The Phillips pan head has a shiny look, and these screws won't rust in damp environments

Plastic Pan Head Phillips Screws

Plastic Pan Head Phillips Screws

Our most common plastic pan head screws

Steel Pan Head Phillips Screws

Steel Pan Head Phillips Screws

Our most popular steel pan head screws

Stainless Steel Truss Head Phillips Screws

Stainless Steel Truss Head Phillips Screws

Our most corrosion-resistant truss head Phillips screws

Stainless Steel Oversized-Flange Button Head Hex-Drive Screws

Stainless Steel Oversized-Flange Button Head Hex-Drive Screws

Up to twice the diameter of standard flanges to spread pressure over a larger area without a washer

Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Sharp internal washer teeth keep corrosion-resistant screws in place during vibration

Thread-Locking Stainless Steel Button Head Hex-Drive Screws

Thread-Locking Stainless Steel Button Head Hex-Drive Screws

Corrosion and vibration resistant, these button head screws secure parts during mild vibration

Stainless Steel Cheese Head Slotted Screws

Stainless Steel Cheese Head Slotted Screws

These slotted cheese head screws won't rust or corrode from moisture and chemicals

Stainless Steel Pan Head Slotted Screws

Stainless Steel Pan Head Slotted Screws

The most corrosion-resistant pan head slotted screws we offer

Steel Pan Head Torx Screws

Steel Pan Head Torx Screws

A deep six-lobe opening prevents your driver from slipping and stripping drives

Stainless Steel Button Head Torx Screws

Stainless Steel Button Head Torx Screws

Our most corrosion-resistant button head Torx screws

JIS Steel Pan Head Screws

JIS Steel Pan Head Screws

Manufactured to meet Japanese Industrial Standards

Sealing Stainless Steel Pan Head Phillips Screws

Sealing Stainless Steel Pan Head Phillips Screws

Keep out dust and contaminants while locking in air and fluid

Brass Pan Head Slotted Screws

Brass Pan Head Slotted Screws

The slotted pan head has a shiny look, and these screws won't rust in damp environments

Stainless Steel Oversized Truss Head Slotted Screws

Stainless Steel Oversized Truss Head Slotted Screws

Protect thin materials with a head that's up to twice the size of standard truss screws

Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws

Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws

The unique two-hole design inhibits tampering

Plastic Pan Head Slotted Screws

Plastic Pan Head Slotted Screws

Lightweight and nonconductive with the simplest drive

Plastic Cheese Head Slotted Screws

Plastic Cheese Head Slotted Screws

Lightweight and nonconductive with a narrow head that fits into tight spaces

Steel Pan Head Slotted Screws

Steel Pan Head Slotted Screws

The pan head has the simplest drive style

Steel Cheese Head Slotted Screws

Steel Cheese Head Slotted Screws

One of the narrowest head styles, they fit into tight spaces

Steel Flanged Button Head Hex-Drive Screws

Steel Flanged Button Head Hex-Drive Screws

Our strongest flanged rounded head screws

Thread-Locking Stainless Steel Pan Head Phillips Screws

Thread-Locking Stainless Steel Pan Head Phillips Screws

Corrosion and vibration resistant, these pan head screws secure parts during mild vibration

Stainless Steel Pan Head Torx Screws

Stainless Steel Pan Head Torx Screws

The most corrosion-resistant pan head Torx screws we offer

JIS Stainless Steel Pan Head Screws

JIS Stainless Steel Pan Head Screws

Our most corrosion-resistant rounded head screws that are made to Japanese Industrial Standards

Tamper-Resistant Torx Stainless Steel Button Head Screws

Tamper-Resistant Torx Stainless Steel Button Head Screws

Deter unauthorized access in corrosive environments

Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Our most corrosion-resistant hex-drive screws for preventing unauthorized access

Tamper-Resistant Torx Steel Button Head Screws

Tamper-Resistant Torx Steel Button Head Screws

Our strongest tamper-resistant Torx screws

Aluminum Oversized-Flange Button Head Hex-Drive Screws

Aluminum Oversized-Flange Button Head Hex-Drive Screws

The lightest flanged screws we offer

Brass Button Head Hex-Drive Screws

Brass Button Head Hex-Drive Screws

The button head has a shiny look, and these screws won't rust in damp environments

Sanitary Stainless Steel Truss Head Screws

Sanitary Stainless Steel Truss Head Screws

Minimize bacteria and contaminants in food, pharmaceutical, and other sanitary environments

Stainless Steel Cheese Head Phillips Screws

Stainless Steel Cheese Head Phillips Screws

Our most corrosion-resistant cheese head Phillips screws

Stainless Steel Pan Head Combination Phillips/Slotted Screws

Stainless Steel Pan Head Combination Phillips/Slotted Screws

Our most corrosion-resistant combination Phillips/slotted screws

Stainless Steel Pan Head Phillips Screws with Spring Lock Washer

Stainless Steel Pan Head Phillips Screws with Spring Lock Washer

A spring lock washer holds corrosion-resistant screws better than tooth-lock washers during vibration

Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Steel Pan Head Phillips Screws with External-Tooth Lock Washer

External teeth provide a stronger grip than internal-tooth lock washers during frequent vibration

Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Sharp internal teeth hold screws in place despite frequent movement and vibration

Titanium Pan Head Phillips Screws

Titanium Pan Head Phillips Screws

Lightweight like aluminum and more corrosion resistant than stainless steel

Venting Stainless Steel Button Head Hex-Drive Screws

Venting Stainless Steel Button Head Hex-Drive Screws

Prevent the buildup of pressure or vacuum in sealed spaces

Left-Hand-Thread Stainless Steel Button Head Hex-Drive Screws

Left-Hand-Thread Stainless Steel Button Head Hex-Drive Screws

Turn these screws to the left to tighten them

Sealing Tamper-Resistant Torx Stainless Steel Button Head Screws

Sealing Tamper-Resistant Torx Stainless Steel Button Head Screws

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

Steel Pan Head Phillips Screws with Split Lock Washer

Steel Pan Head Phillips Screws with Split Lock Washer

Stop screws from loosening due to light vibration

Steel Button Head Torx Plus Screws

Steel Button Head Torx Plus Screws

Our strongest Torx Plus rounded head screws

Titanium Button Head Hex-Drive Screws

Titanium Button Head Hex-Drive Screws

Nearly as strong as alloy steel but only 40% of the weight

Extended-Tip Stainless Steel Cheese Head Slotted Screws

Extended-Tip Stainless Steel Cheese Head Slotted Screws

Guide screws into holes, keeping the screw straight and aligned when fastening in corrosive environments

Extended-Tip Steel Cheese Head Slotted Screws

Extended-Tip Steel Cheese Head Slotted Screws

The tip guides these screws into holes, keeping the screw straight and aligned

Other Products

Binding Barrels

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

Oval Head Screws

Oval Head Screws

The domed top sits slightly above the surface of countersunk holes for a decorative look

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.)