4-40 Shoulder Bolts | McMaster-Carr

Filter by

System of Measurement

Thread Size

Shoulder Diameter

Shoulder Length

Thread Length

Fastener Head Type

Material

Head Diameter

Socket Head Profile

Drive Style

Head Height

Head Texture

Shoulder Fit

Thread Direction

Tensile Strength

Finish

Drive Size

Minimum Shear Strength

Threading

Thread Type

REACH Compliance

DFARS Compliance

RoHS Compliance

Forward

How can we improve?

301 Products

About Shoulder Screws

Alloy Steel Shoulder Screws

Comparable in strength to Grade 8 steel. These screws have inch thread sizes.

18-8 Stainless Steel Shoulder Screws

Made from 18-8 stainless steel, these inch-sized shoulder screws have good chemical resistance.

316 Stainless Steel Shoulder Screws

More corrosion resistant than 18-8 stainless steel shoulder screws, these have excellent resistance to chemicals and salt water. These screws have inch thread sizes.

High-Strength 17-4 PH Stainless
Steel Shoulder Screws

Shoulder screws made of 17-4 PH stainless steel are nearly twice as strong as 18-8 stainless steel and have the same corrosion resistance. These screws have inch thread sizes.

Aluminum Shoulder Screws

One-third the weight of steel, aluminum shoulder screws are lightweight and have good corrosion resistance.

Titanium Shoulder Screws

Titanium shoulder screws have a high strength-to-weight ratio and are more resistant to acids and salt water than nickel shoulder screws.

Nickel Alloy Shoulder Screws

Nickel alloy shoulder screws are more resistant to acids and salt water than stainless steel shoulder screws.

18-8 Stainless Steel
Thread-Locking Shoulder Screws

These shoulder screws have good chemical resistance.

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Shoulder Screws

More corrosion resistant than 18-8 stainless steel shoulder screws, these have excellent resistance to chemicals and salt water.

Internally Threaded Shoulders

Screw these shoulders onto a stud.

Left-Hand Threaded Shoulder Screws

Tighten these shoulder screws by turning them to the left; once fastened, they resist loosening from counterclockwise motion.

Precision Shoulder Screws

18-8 Stainless Steel Precision Shoulder Screws

18-8 Stainless Steel Precision Shoulder
Screws with Material Certification

These shoulder screws come with a traceable lot number and material test report.

Slotted 18-8 Stainless Steel
Precision Shoulder Screws

Thumb-Grip 18-8 Stainless
Steel Precision Shoulder Screws

Install and remove these shoulder screws by hand or with a hex key.

316 Stainless Steel Precision Shoulder Screws

More corrosion resistant than 18-8 stainless steel shoulder screws, these have excellent resistance to chemicals and salt water.

High-Strength 416 Stainless
Steel Precision Shoulder Screws

Made of 416 stainless steel, these shoulder screws are almost twice as strong as 18-8 stainless steel and have the same corrosion resistance.

Headless Alloy Steel Precision Shoulder Screws

Without a head to get in the way, these screws fit in tight spaces where standard shoulder screws cannot. Either thread them in a countersunk hole for a flush mount, or install them with the shoulder sticking out to use them as pins or dowels for aligning and locating components.

Alloy Steel Precision Shoulder Screws

Comparable to Grade 8 steel, these screws are the strongest precision shoulder screws we offer.

Brass Precision Shoulder Screws

Brass shoulder screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Low-Profile Precision Shoulder Screws

Slotted Low-Profile Precision Shoulder Screws

Ultra-Low-Profile Precision Shoulder Screws

These screws have a head height about one-third the head height of a standard shoulder screw. Use them in low-clearance applications such as inside machines.

Slotted Ultra-Low-Profile Precision Shoulder Screws

These slotted screws have a head height about one-third the head height of a standard shoulder screw. Use them in low-clearance applications such as inside machines.