Special Offers
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6.3 X 25 Hex Head Self Drilling Screw DIN 7504-K A2 Stainless Steel
In stockRRP From £11.21 -
M8 Flat Washer, Form A DIN 125-A A2 Stainless Steel
In stockRRP From £2.69 -
M8 Nylon Insert Nut DIN 985 A2 Stainless Steel
In stockRRP From £3.23 -
M10 Hexagon Full Nut DIN 934 A2 Stainless Steel
In stockRRP From £3.99
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M3 Square Sect Spring Washer DIN 7980 A2 Stainless Steel
In stockThis M3 spring washer is manufactured to DIN 7980 in A2 stainless steel (304 grade). DIN 7980 specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring...RRP From £2.48RRP From £2.48 -
M3 Square Sect Spring Washer DIN 7980 A4 Stainless Steel
In stockThis M3 spring washer is manufactured to DIN 7980 in A4 stainless steel (316 grade). DIN 7980 specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring...RRP From £16.17RRP From £16.17 -
M3 Wavey Washer DIN 137-B Stainless Steel
In stockThis M3 wave washer is manufactured to DIN 137-B in stainless steel. DIN 137-B specifies a ring waved along its circumference to act as a light spring, for taking up play and light axial preload. The...RRP From £10.89RRP From £10.89 -
M3 Rect Sect Spring Washer DIN 127-B A4 Stainless Steel
In stockThis M3 spring washer is manufactured to DIN 127-B in A4 stainless steel (316 grade). DIN 127-B specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring...RRP From £16.17RRP From £16.17 -
M3 Safety Locking Washer, Type S A2 Stainless Steel
In stockThis M3 safety locking washer is manufactured in A2 stainless steel (304 grade). The cam faces between the pair are steeper than the thread pitch, so any attempt to turn the nut has to lift the...RRP From £6.74RRP From £6.74 -
M3 Internal Tooth Washer DIN 6798-J A2 Stainless Steel
In stockThis M3 internal tooth lock washer is manufactured to DIN 6798-J in A2 stainless steel (304 grade). DIN 6798-J specifies a washer with serrated teeth projecting inward around the bore, for resisting loosening where the teeth...RRP From £2.52RRP From £2.52 -
M3 Internal Tooth Washer DIN 6797-J A4 Stainless Steel
In stockThis M3 external tooth lock washer is manufactured to DIN 6797-J in A4 stainless steel (316 grade). DIN 6797-J specifies a washer with twisted teeth around the outer edge, for resisting loosening under vibration. The twisted...RRP From £16.41RRP From £16.41 -
M3 Flat Washer, Form A ISO 7089 A4 Stainless Steel
Out of stockThis M3 Form A flat washer is manufactured to ISO 7089 in A4 stainless steel (316 grade). ISO 7089 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £9.92RRP From £9.92 -
M3 Rect Sect Spring Washer DIN 127-B Stainless Steel
In stockThis M3 spring washer is manufactured to DIN 127-B in stainless steel. DIN 127-B specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring is compressed flat...RRP From £10.77RRP From £10.77 -
M3 Flat Washer, Form A ISO 7089 A2 Stainless Steel
In stockThis M3 Form A flat washer is manufactured to ISO 7089 in A2 stainless steel (304 grade). ISO 7089 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £6.74RRP From £6.74 -
M3 Internal Tooth Washer DIN 6798-J A4 Stainless Steel
In stockThis M3 internal tooth lock washer is manufactured to DIN 6798-J in A4 stainless steel (316 grade). DIN 6798-J specifies a washer with serrated teeth projecting inward around the bore, for resisting loosening where the teeth...RRP From £6.49RRP From £6.49 -
M3 Internal Tooth Washer DIN 6797-J A2 Stainless Steel
In stockThis M3 external tooth lock washer is manufactured to DIN 6797-J in A2 stainless steel (304 grade). DIN 6797-J specifies a washer with twisted teeth around the outer edge, for resisting loosening under vibration. The twisted...RRP From £6.72RRP From £6.72 -
M3 External Tooth Washer DIN 6798-A A4 Stainless Steel
In stockThis M3 external tooth lock washer is manufactured to DIN 6798-A in A4 stainless steel (316 grade). DIN 6798-A specifies a washer with serrated teeth projecting around the outer edge, for resisting loosening under vibration. The...RRP From £16.35RRP From £16.35 -
M3 External Tooth Washer DIN 6797-A A2 Stainless Steel
In stockThis M3 external tooth lock washer is manufactured to DIN 6797-A in A2 stainless steel (304 grade). DIN 6797-A specifies a washer with twisted teeth around the outer edge, for resisting loosening under vibration. The twisted...RRP From £6.69RRP From £6.69 -
M3 Flat Washer DIN 433 A2 Stainless Steel
In stockThis M3 small series flat washer is manufactured to DIN 433 in A2 stainless steel (304 grade). DIN 433 specifies a flat washer with a reduced outside diameter compared with the normal series, for confined spaces...RRP From £6.64RRP From £6.64 -
M3 Flat Washer DIN 9021 A4 Stainless Steel
In stockThis M3 penny washer is manufactured to DIN 9021 in A4 stainless steel (316 grade). DIN 9021 specifies a flat washer with an outside diameter substantially larger than the normal series, for spreading load across soft...RRP From £6.61RRP From £6.61 -
M3 Flat Washer, Form A DIN 125-A A4 Stainless Steel
In stockThis M3 Form A flat washer is manufactured to DIN 125-A in A4 stainless steel (316 grade). DIN 125-A specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £3.19RRP From £3.19 -
M3 Flat Washer DIN 9021 A2 Stainless Steel
In stockThis M3 penny washer is manufactured to DIN 9021 in A2 stainless steel (304 grade). DIN 9021 specifies a flat washer with an outside diameter substantially larger than the normal series, for spreading load across soft...RRP From £3.91RRP From £3.91 -
M3 Flat Washer DIN 433 A4 Stainless Steel
In stockThis M3 small series flat washer is manufactured to DIN 433 in A4 stainless steel (316 grade). DIN 433 specifies a flat washer with a reduced outside diameter compared with the normal series, for confined spaces...RRP From £16.11RRP From £16.11 -
M3 Crinkle Washer BS 4463 A2 Stainless Steel
In stockThis M3 crinkle washer is manufactured to BS 4463 in A2 stainless steel (304 grade). BS 4463 specifies a lightly corrugated ring giving spring under the head, for light-duty locking on small fixings. The corrugations compress...RRP From £2.70RRP From £2.70 -
M3 External Tooth Washer DIN 6798-A A2 Stainless Steel
In stockThis M3 external tooth lock washer is manufactured to DIN 6798-A in A2 stainless steel (304 grade). DIN 6798-A specifies a washer with serrated teeth projecting around the outer edge, for resisting loosening under vibration. The...RRP From £6.72RRP From £6.72 -
M27 Wavey Washer DIN 137-B A1 Stainless Steel
Out of stockThis M27 wave washer is manufactured to DIN 137-B in A1 stainless steel. DIN 137-B specifies a ring waved along its circumference to act as a light spring, for taking up play and light axial preload....RRP From £14.68RRP From £14.68 -
M3 Curved Spring Washer DIN 128-A Stainless Steel
In stockThis M3 curved spring washer is manufactured to DIN 128-A in stainless steel. DIN 128-A specifies a washer curved along its length to act as a light spring, for maintaining tension in a joint. The curve...RRP From £7.42RRP From £7.42 -
M3 Conical Spring Washer DIN 6796 A2 Stainless Steel
In stockThis M3 spring washer is manufactured to DIN 6796 in A2 stainless steel (304 grade). DIN 6796 specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring...RRP From £6.69RRP From £6.69 -
M27 Square Sect Spring Washer DIN 7980 A4 Stainless Steel
In stockThis M27 spring washer is manufactured to DIN 7980 in A4 stainless steel (316 grade). DIN 7980 specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring...RRP From £11.32RRP From £11.32
Stainless steel washers in A2 (304) and A4 (316), from M1.6 to M64, plus imperial BA and No. gauge sizes. A few flat washers also come in duplex (1.4462) stainless.
- Flat washers: Form A (DIN 125-A and ISO 7089), Forms B, C and D (BS 4320), large diameter washers to DIN 9021 and ISO 7093, small washers to DIN 433, and imperial washers to BS 3410.
- Penny washers with a wide outside diameter to spread load into timber and soft materials.
- Spring and lock washers: rectangular and square section spring washers (DIN 127-B and DIN 7980), curved (DIN 128-A) and conical (DIN 6796) spring washers, internal and external tooth washers, crinkle and wavy washers, and tab washers.
- Specialist washers: bonded sealing washers, square plate washers, taper washers, cup washers, and conical seat and spherical washers.
Frequently asked questions
What types of stainless steel washer does Simfix stock?
Flat washers in Forms A, B, C and D, large and small diameter washers, penny washers, spring washers in rectangular, square, curved and conical forms, tooth, crinkle, wavy and tab lock washers, and specialist washers including bonded sealing, square plate, taper and cup washers. Most come in both A2 (304) and A4 (316).
What is a Form C washer used for?
A Form C washer (BS 4320) has a larger outside diameter than a standard Form A washer, which spreads the clamping load over a wider area. Use it where the material under the bolt head is soft, thin, or has an oversized clearance hole, such as softwood decking or thin sheet. Simfix stocks Form C washers in A2 from M4 to M30, and in A4 in M4, M5, M6, M8, M12, M14, M16, M20, M24, M27, M30, M33 and M36.
Does a spring washer stop a bolt coming loose?
A rectangular section spring washer (DIN 127-B) gives some resistance to loosening under light vibration, by staying under compression as the bolt settles. For joints exposed to significant vibration, such as trailers or machinery, a nyloc (nylon insert) nut gives more reliable resistance than a spring washer alone. Simfix stocks both.
What sizes of stainless steel washer does Simfix stock?
Form A flat washers run from M1.6 to M64 in both A2 (304) and A4 (316). Form B goes up to M39, Form C up to M36, rectangular section spring washers up to M42, and penny washers from M3 to M12. Not every size is held in both grades, and each product listing is a single size.
Sizes, grades and pack quantities vary by product type. Check the individual product listing for the exact specification and current availability.