5⁄16"-18 Thread Rounded Head Screws | McMaster-Carr

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558 Products

Rounded Head Screws

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

Aluminum Oversized-Flange Button Head Hex-Drive Screws

Aluminum Oversized-Flange Button Head Hex-Drive Screws

The lightest flanged screws we offer

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 Hex-Drive Screws

Steel Button Head Hex-Drive Screws

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

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

Steel Flanged Button Head Hex-Drive Screws

Steel Flanged Button Head Hex-Drive Screws

Our strongest flanged rounded head screws

Stainless Steel Button Head Torx Screws

Stainless Steel Button Head Torx Screws

Our most corrosion-resistant button head Torx screws

Steel Pan Head Phillips Screws

Steel Pan Head Phillips Screws

Our most popular steel pan head screws

Stainless Steel Round Head Phillips Screws

Stainless Steel Round Head Phillips Screws

The most corrosion-resistant round head Phillips screws we offer

Stainless Steel Truss Head Phillips Screws

Stainless Steel Truss Head Phillips Screws

Our most corrosion-resistant truss head Phillips screws

Stainless Steel Fillister Head Slotted Screws

Stainless Steel Fillister Head Slotted Screws

The most corrosion-resistant fillister head slotted screws we offer

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

Plastic Pan Head Phillips Screws

Plastic Pan Head Phillips Screws

Our most common plastic pan head screws

Steel Truss Head Slotted Screws

Steel Truss Head Slotted Screws

A wide head spreads out pressure and minimizes the risk of crushing thin material

Steel Round Head Slotted Screws

Steel Round Head Slotted Screws

The round head has the simplest drive style

Stainless Steel Round Head Slotted Screws

Stainless Steel Round Head Slotted Screws

Our most corrosion-resistant round head slotted screws

Tamper-Resistant Torx Stainless Steel Button Head Screws

Tamper-Resistant Torx Stainless Steel Button Head Screws

Deter unauthorized access in corrosive environments

Brass Round Head Slotted Screws

Brass Round Head Slotted Screws

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

Stainless Steel Truss Head Slotted Screws

Stainless Steel Truss Head Slotted Screws

Our most corrosion-resistant truss head slotted screws

Steel Pan Head Slotted Screws

Steel Pan Head Slotted Screws

The pan head has the simplest drive style

Steel Round Head Phillips Screws

Steel Round Head Phillips Screws

A domed profile that gives a decorative look

Thread-Locking Steel Button Head Hex-Drive Screws

Thread-Locking Steel Button Head Hex-Drive Screws

Strong and vibration resistant to lock parts in place on machinery that experiences mild vibration

Steel Button Head Torx Plus Screws

Steel Button Head Torx Plus Screws

Our strongest Torx Plus rounded head screws

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

Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

A wide top distributes weight and a two-hole design deters tampering

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

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 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

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

Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws

Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws

Sloped with three notches, so they're nearly impossible to grip without the proper tool

Steel Fillister Head Slotted Screws

Steel Fillister Head Slotted Screws

The tall, narrow head reduces the chance of slotted drivers slipping and fits into tight spaces

Tamper-Resistant Hex-Drive Steel Button Head Screws

Tamper-Resistant Hex-Drive Steel Button Head Screws

Our strongest hex-drive screws for deterring unauthorized access

Other Products

Binding Barrels

Binding Barrels

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

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

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

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

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