Socket Head Cap Screws

Feature a hexagonal recess and driven using a hex wrench or insert bit. Low profile for safety & hoisting a rounded head.

Suitable for narrow spaces where raised head screws would not usually fit. Sit flush against the surface, giving a low-profile finish. Socket drive permits the use of these fasteners in places that would be unsuitable for externally driven fasteners

Combined with specialised insert bits and hex wrenches. Can be used with power drivers to speed up installation. Cylindrical head ensures strong yield and tensile strength

Ideal for assemblies where space is limited. Unthreaded portion below the screw's head aids the screws' self-retaining nature; can only be partially removed

Eliminates the need for separate washers. Distribute pressure where the screw meets the surface without taking as much space as a washer

Used in applications that require a decorative finish as they sit flush in the target housing. Used in pre-drilled countersunk recesses

Mildly corrosion resistant in dry environments

Easy to distinguish

Decorative, mirror-like finish

Mild lubricity so they thread smoothly

Resists chemicals and withstands 96 hours of salt spray

Resists corrosion in wet environments

Withstand 1000 hours of salt spray per ASTM B117 standards

Better corrosion resistance than ordinary zinc-plated screws and comparable to Dacromet-coated screws

Spaced closer together to prevent loosening during vibrations. As fine threads travel a short distance with each turn, ideal for making precise adjustments

Spaced widely for an easy start requiring the fewest turns to tighten. Deep and thick structure minimises the chance of stripping or jamming, even if nicked, dirty, or rusty

Even more closely spaced than fine threads. Travel a very short distance with each turn allowing incremental adjustments

Similar to Torx drives, but have flat edges between lobes for a better drive angle. Require less force to turn and keep the driver from slipping (ideal for assembly lines). Use them with a Torx Plus driver

Make a six-point groove that turns with less force than other internal drives. Using a Torx-head driver will prevent slipping

The deep, four-point hole prevents the square driver from slipping while you turn the screw

Can be tightened using a hex driver or Allen key. The six-pointed hole prevents the driver from sliding off when turned, so do not overtighten

Also known as pin-in Torx fasteners, have a deep groove with many points

Tighten or loosen with a hex-head driver. Because of the six-point notch in the head, the hex key won't slip as you tighten it

Have five lobes, so you can tighten it with less damage to the recess. Use tamper-resistant Torx Plus drivers and bits to install it

M10 to M100

Hot & Cold Forged

3/8 to 8 inches

UNC, UNF, ISO, BSW & ACME

ASME, BS, DIN, ISO, UNI, DIN-EN

High strength (but vulnerable to corrosion)

Lightweight, thermally & electrically conductive, and corrosion-resistant

Excellent mechanical strength, surface stability, corrosion resistance; creep resistant at high temperatures

40% stronger than brass screws; corrosion-resistant to salt water, gases & sewage; non-magnetic & electrically conductive

Chemical & corrosion resistant and appealing surface finish

Hard, strong, light & corrosion resistant; alloying with other materials can increase strength & durability

Inexpensive & corrosion-resistant; suitable for light loads; used near water, such as swimming pools

Strong, conductive & corrosion-resistant; low magnetic permeability

Good load capacity & wear-resistant; suitable for use near magnets

Excellent resistance to salt water & some acids; comparable to Monel; mildly magnetic

Engaged with a tapped, threaded hole all the way to the head. Choose these if sideways force isn't a concern

Have a unthreaded head portion for greater holding power. Features a stronger unthreaded part than the threaded one