A1 Stainless Steel Screws - Westfield Fasteners Ltd

Fastener Material Key
A1	A1 Stainless Steel - Also known as grade 303. A general purpose grade of stainless steel but with better fabrication/machining properties than grade 304.
A2	A2 Stainless Steel - Also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4	A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
A4-80	A4-80 Stainless Steel - Identical corrosion resistance to A4-70 but with a higher tensile strength equivalent to that of 8.8 high tensile steel.
Duplex	Duplex Stainless Steel 1.4462 - A type of stainless steel which has greater corrosion resistance than A4 / 316 and a high tensile strength of minimum 700 N/mm2. Also known as 318LN.

Thumb Screw Low Type DIN 653 in A1 Stainless Steel

Thumb Screw Low Type DIN 653 in A1 Stainless Steel

This is the thin type of knurled thumb screw, as it has no shoulder beneath the head, unlike the high type of thumb screws. The large head diameter allows these fasteners to be easily adjusted to a precise tightness by hand. They are frequently used in situations where routine maintenance is required, as they are quicker and easier to fit and adjust in comparison to fasteners which require a driver.

A1

M3

M4

M5

M6

M8

M10

Slotted Large Pan Head Screw DIN 921 in A1 Stainless Steel

image chamfer for Slotted Large Pan Head Screw DIN 921

Slotted Large Pan Head Screw DIN 921 in A1 Stainless Steel

These large diameter headed screws offer excellent load distribution and an aesthetically pleasing low-profile head. The wide head also eliminates the need for a washer. Installed using a flat head screwdriver, the slotted pan head screw is useful in situations where a thumbscrew or a standard pan head screw is not suitable.

A1

M2

M3

M4

M5

M6

M8

Slotted Capstan Screws (DIN 404) in A1 Stainless Steel

image chamfer for Slotted Capstan Screws (DIN 404)

Slotted Capstan Screws (DIN 404) in A1 Stainless Steel

Capstan Screws are designed to be tightened or loosened from the side rather than the top. By inserting a small bar into one of the side radial holes in the head. Manufactured to DIN 404 and with a slotted head. Great for use where there is restricted access to the top of the screw.

A1

M3

M4

M5

M6

Slotted Thumb Screws High Type (DIN 465) in A1 Stainless Steel

Slotted Thumb Screws High Type (DIN 465) in A1 Stainless Steel

Slotted Thumb Screws or Slotted Knurled Knob Screws are designed primarily to be tightened and loosened by hand, without the need for a screwdriver or ratchet, but this version comes with a slot in the head for a standard slotted screwdriver. The 'knurled' feature of the head makes this type of screw ideal for use where conditions can be challenging such as food preparation or clean room operations. Manufactured to DIN 465.

A1

M3

M4

M5

M6

Thumb Screws High Type (DIN 464) in A1 Stainless Steel

Thumb Screws High Type (DIN 464) in A1 Stainless Steel

Thumb Screws or Knurled Knob Screws are designed to be tightened and loosened by hand, without the need for a screwdriver or ratchet. The 'knurled' feature of the head makes this type of screw ideal for use where conditions can be challenging such as food preparation or clean room operations. Manufactured to DIN 464.

A1

M3

M4

M5

M6

M8

M10