Key Screws | McMaster-Carr

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Material

Stainless Steel

Threading

Partially Threaded

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Drilled Spanner

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Hex with Pilot Recess

Tamper-Resistant Hex

Tamper-Resistant Torx

Tamper-Resistant Torx Plus

Finish

Titanium Carbon Nitride (TiCN) Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Socket Head Profile

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Specifications Met

Federal Specification

Fastener Strength Grade/Class

Tensile Strength

Less than 20,000 psi

20,000 psi to 49,999 psi

50,000 psi to 69,999 psi

70,000 psi to 99,999 psi

100,000 psi or greater

Flat Head Profile

Screw Size

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DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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25,208 Products

Fastening and Joining

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Shoulder Screws

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

Plow Bolts

The head sits flush with countersunk holes while the bolt stays in place when tightening a nut

Pentagon Head Screws

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

Fastener Assortments

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

Tighten and loosen by hand without the need for tools

Tapping Screws

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

Binding Barrels and Screws

Binding Barrels and Screws

Thread together for a low-profile fastener

Electrical

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

Building and Machinery Hardware

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

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