Zinc-plated pan head self tapping screws, manufactured to BS 4174. Case hardened for shear resistance and torque strength. AB recess type with Trivalent Chromium (CR3) zinc plating. Available in a wide range of sizes.
Size
Price
QTY
4 x 3/8
£0.89£1.07
4 x 1/2
£1.07£1.28
6 x 3/8
£0.99£1.19
6 x 3/4
£1.35£1.62
6 x 5/8
£1.36£1.63
6 x 1
£1.45£1.74
8 x 1/2
£1.55£1.86
8 x 3/8
£1.59£1.91
8 x 5/8
£1.97£2.36
8 x 3/4
£1.97£2.36
6 x 1/2
£1.26£1.51
8 x 1
£1.98£2.38
8 x 11/4
£3.09£3.71
8 x 11/2
£3.29£3.95
8 x 2
£3.58£4.30
10 x 1/2
£2.42£2.90
10 x 5/8
£2.18£2.62
10 x 3/4
£2.38£2.86
10 x 1
£2.79£3.35
10 x 11/4
£3.19£3.83
10 x 11/2
£4.08£4.90
10 x 2
£4.85£5.82
12 x 1/2
£2.96£3.55
12 x 1
£3.97£4.76
12 x 11/2
£4.65£5.58
14 x 3/4
£5.36£6.43
Pan head self tapping screws are one of those fixings you reach for constantly on site, and getting a reliable box matters more than most people think. These zinc-plated pan head self tapping screws are manufactured to BS 4174, which sets the standard for AB type cross-recess screws in the UK. The pan head profile sits flush and low against the surface, making it the go-to choice where a flat, wide bearing head is needed without a countersunk recess.
Each screw is case hardened, which means the outer layer is toughened during manufacture to resist shearing under load and handle the torque you put through a driver without the head rounding off. Anyone who has driven a box of cheap screws and stripped half of them knows exactly why this matters. The case hardening also means the thread cuts cleanly into the parent material rather than deforming before it bites.
The plating is Trivalent Chromium (CR3) zinc at 3 microns. This is the modern, safer alternative to hexavalent chrome plating, and it gives the screws adequate corrosion protection for general interior and sheltered applications. It also gives them that clean, bright silver finish you would expect from a decent fixing.
Pan Head Self Tapping Screw Sizes and Variants
The range covers sizes from the smaller No. 2 x 5/16 right up to No. 14 x 3/4, with No. 6, 8, 10, and 12 gauges available in multiple lengths. That spread makes it straightforward to work across light sheet metal, electrical enclosures, plastic housings, and thin-section materials without needing to source fixings from several different suppliers. The AB thread form cuts its own mating thread in pre-drilled or punched holes, so there is no separate tapping step required.
Box quantity is 200 screws, which is a practical working quantity for most jobs. You are not committing to a thousand screws when you only need a box for a specific run of work, but there is enough there to get through a decent day without running out.
Why the Head Shape Matters
Pan heads give a larger bearing surface than countersunk or raised countersunk profiles, which spreads the clamping load over a wider area. This is particularly useful when fixing into softer materials or thinner sheet where a countersunk profile might pull through under load. The cross recess drive is compatible with standard Pozidriv and Phillips bits, so no specialist tooling is needed.
These pan head self tapping screws are a solid, no-nonsense choice for trade use where you need a BS-compliant fixing that performs consistently. The wide size range, the case hardening, and the CR3 zinc finish all add up to a fixing that earns its place in the van.
Pro Tip: Always pilot drill to the correct tapping drill size for the gauge you are using; driving AB type self tappers into unprepared material without a pilot hole increases the risk of cracking thin plastics and distorting light-gauge sheet metal.
These pan head self tapping screws are used across a broad range of light fixings in sheet metal, electrical work, plastic fabrication, and general assembly tasks. The pan head profile and AB thread make them suitable wherever a clean, low-profile fixing is needed in pre-drilled or punched material.
Fixing electrical back boxes, trunking, and enclosure lids to sheet metal panels
Assembling light steel fabrications and thin-section brackets
Securing plastic housings, covers, and cable management components
Sheet metal fabrication and HVAC ductwork assembly
General workshop and manufacturing assembly tasks
Signage and display panel fixing to thin substrates
Automotive and vehicle bodywork trim attachments
Available in sizes from No. 2 up to No. 14, these screws cover the range of gauges most commonly needed across electrical, mechanical, and sheet metal trades.
Best For
Sheet metal and thin-gauge steel
Electrical enclosures and back boxes
Plastic housings and panels
Light fabrication and assembly
HVAC ductwork fixing
Available In
No. 2 x 5/16 through to No. 14 x 3/4
Gauges: 2, 4, 6, 8, 10, 12, 14
Multiple lengths per gauge
Box quantity: 200 screws
Key Properties
Manufactured to BS 4174
AB cross-recess (Pozidriv/Phillips compatible)
Case hardened for shear and torque resistance
CR3 Trivalent Chromium zinc plating, 3 microns
Pan head profile for wide bearing surface
Self-tapping AB thread form
Not suitable for: Not suitable for structural or load-bearing applications. The CR3 zinc plating provides limited corrosion protection and is not recommended for permanently exposed exterior use or marine environments.
Select the correct screw gauge and length for the material thickness you are fixing. As a general guide, the screw thread should engage a minimum of two to three full threads into the parent material for a secure hold. Pre-drill or punch a pilot hole to the recommended tapping drill size for the gauge being used.
Drive at a controlled speed using a Pozidriv or Phillips bit. Running the driver too fast in thin sheet metal can cause the screw to strip the thread it has just cut. Once the head seats against the surface, stop driving. The pan head is not designed to pull flush like a countersunk screw, so over-driving will distort the material and reduce clamping force.
Select the correct screw gauge and length for the material thickness and joint depth required.
Drill or punch a pilot hole using the correct tapping drill size for the screw gauge.
Position the screw in the pilot hole and start it by hand or at low driver speed to ensure it engages squarely.
Drive at a controlled speed using a Pozidriv or Phillips bit to avoid stripping the thread.
Stop driving as soon as the pan head seats firmly against the surface, do not over-tighten.
What is the difference between an AB type self tapping screw and a standard self tapping screw?
AB type screws have a tapered point and a thread form specifically designed to cut their own mating thread in pre-drilled or punched holes in thin sheet metal and plastics. Standard 'A' type screws have a similar thread but a sharper taper, while 'B' type have a blunter end. The AB form is a widely used general-purpose thread that suits most light sheet metal and plastic applications.
Are these screws suitable for use outdoors?
The CR3 zinc plating at 3 microns gives reasonable corrosion resistance for indoor and sheltered applications. For permanently exposed exterior use, or in high-humidity or coastal environments, a more heavily plated or stainless steel fixing would be a better choice.
What driver bit do I need for these pan head self tapping screws?
These screws use an AB cross recess drive, which is compatible with standard Pozidriv (PZ) or Phillips (PH) bits. For most sizes in this range, a PZ2 or PH2 bit will be the correct fit. Check the fit before driving as using an undersized bit will round off the recess.
These pan head self tapping screws are manufactured to BS 4174, the British Standard governing cross-recess pan head screws in the AB thread form. The screws are case hardened to increase surface strength, improving resistance to shearing under load and excess torque during installation. The Trivalent Chromium (CR3) zinc plating is applied at 3 microns, providing corrosion protection for indoor and sheltered use while meeting current RoHS-compliant plating standards.
10 x 1, 10 x 1/2, 10 x 11/2, 10 x 11/4, 10 x 2, 10 x 3/4, 10 x 5/8, 12 x 1, 12 x 1/2, 12 x 11/2, 14 x 3/4, 2 x 5/16, 4 x 1/2, 4 x 3/8, 6 x 1, 6 x 1/2, 6 x 1/4, 6 x 3/4, 6 x 3/8, 6 x 5/8, 8 x 1, 8 x 1/2, 8 x 11/2, 8 x 11/4, 8 x 2, 8 x 3/4, 8 x 3/8, 8 x 5/8
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