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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5/16" Rect Sect Spring Washer ANSI/ASME B18.21.1 Stainless Steel
In stockThis 5/16" spring washer is manufactured to ANSI/ASME B18.21.1 in stainless steel. ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat as the joint...RRP From £10.49RRP From £10.49 -
5/32" X 3/8" Flat Washer, Table 3 Light A2 Stainless Steel
Out of stockThis 5/32" x 3/8" Form A flat washer is manufactured in A2 stainless steel (304 grade). Placed under a bolt head or nut face, the washer spreads the clamping load over a larger bearing area, reducing...RRP From £4.82RRP From £4.82 -
35 X 12 Conical Seat Washer DIN 6319-D A2 Stainless Steel
In stockThis 35 x 12mm conical seat washer is manufactured to DIN 6319-D in A2 stainless steel (304 grade). DIN 6319-D specifies a coned seat that lets the fixing sit at an angle, for joints where the...RRP From £18.47RRP From £18.47 -
5.3 X 14 Bonded Sealing Washer A2 Stainless Steel
In stockThis 5.3 x 14mm bonded sealing washer is manufactured in A2 stainless steel (304 grade). As the fastener is tightened the elastomer is compressed into the joint face and around the shank, forming a seal that...RRP From £5.72RRP From £5.72 -
3/8" Rect Sect Spring Washer ANSI/ASME B18.21.1 Stainless Steel
Out of stockThis 3/8" spring washer is manufactured to ANSI/ASME B18.21.1 in stainless steel. ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat as the joint...RRP From £3.76RRP From £3.76 -
5.3 X 12 Bonded Sealing Washer A2 Stainless Steel
In stockThis 5.3 x 12mm bonded sealing washer is manufactured in A2 stainless steel (304 grade). As the fastener is tightened the elastomer is compressed into the joint face and around the shank, forming a seal that...RRP From £3.68RRP From £3.68 -
4BA Flat Washer, Table 1 BS 3410 A2 Stainless Steel
In stockThis 4 Form A flat washer is manufactured to BS 3410 in A2 stainless steel (304 grade). BS 3410 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £16.23RRP From £16.23 -
3/4" Rect Sect Spring Washer ANSI/ASME B18.21.1 Stainless Steel
In stockThis 3/4" spring washer is manufactured to ANSI/ASME B18.21.1 in stainless steel. ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat as the joint...RRP From £24.04RRP From £24.04 -
3/8" Rect Sect Spring Washer ANSI/ASME B18.21.1 A4 Stainless Steel
In stockThis 3/8" spring washer is manufactured to ANSI/ASME B18.21.1 in A4 stainless steel (316 grade). ANSI/ASME B18.21.1 specifies a split washer with a rectangular section and offset ends, for maintaining tension under vibration. The split ring...RRP From £21.78RRP From £21.78 -
3/4" Rect Sect Spring Washer ANSI/ASME B18.21.1 A4 Stainless Steel
In stockThis 3/4" spring washer is manufactured to ANSI/ASME B18.21.1 in A4 stainless steel (316 grade). ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat...RRP From £33.81RRP From £33.81 -
3/8" Flat Washer, Table 3 Light BS 3410 A2 Stainless Steel
In stockThis 3/8" Form A flat washer is manufactured to BS 3410 in A2 stainless steel (304 grade). BS 3410 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £3.10RRP From £3.10 -
3/16" Flat Washer, Table 3 Light BS 3410 A2 Stainless Steel
In stockThis 3/16" Form A flat washer is manufactured to BS 3410 in A2 stainless steel (304 grade). BS 3410 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £4.97RRP From £4.97 -
3/4" Flat Washer, Table 3 Light BS 3410 A2 Stainless Steel
In stockThis 3/4" Form A flat washer is manufactured to BS 3410 in A2 stainless steel (304 grade). BS 3410 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £11.67RRP From £11.67 -
3/16" Rect Sect Spring Washer ANSI/ASME B18.21.1 Stainless Steel
In stockThis 3/16" spring washer is manufactured to ANSI/ASME B18.21.1 in stainless steel. ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat as the joint...RRP From £6.73RRP From £6.73 -
2BA Flat Washer, Table 1 BS 3410 A2 Stainless Steel
In stockThis 2 Form A flat washer is manufactured to BS 3410 in A2 stainless steel (304 grade). BS 3410 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £11.22RRP From £11.22 -
3/32" Rect Sect Spring Washer ANSI/ASME B18.21.1 A4 Stainless Steel
In stockThis 3/32" spring washer is manufactured to ANSI/ASME B18.21.1 in A4 stainless steel (316 grade). ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat...RRP From £16.60RRP From £16.60 -
2.7 X 0.5 Flat Washer DIN 433 A4 Stainless Steel
In stockThis 2.7 x 0.5mm 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...RRP From £16.78RRP From £16.78 -
21mm Spherical Washer DIN 6319-C A2 Stainless Steel
In stockThis 21 spherical Washer is manufactured to DIN 6319-C in A2 stainless steel (304 grade).Typical applications Workshop, maintenance, and repair work Machinery assembly and equipment mounting General fabrication and engineering Brackets, frames, and shelving systems Available...RRP From £18.02RRP From £18.02 -
13.0 X 29 Bonded Sealing Washer Stainless Steel
In stockThis 13.0 x 29mm bonded sealing washer is manufactured in stainless steel. As the fastener is tightened the elastomer is compressed into the joint face and around the shank, forming a seal that keeps water, oil,...RRP From £8.51RRP From £8.51 -
23.2mm Conical Seat Washer DIN 6319-D A2 Stainless Steel
In stockThis 23.2 conical seat washer is manufactured to DIN 6319-D in A2 stainless steel (304 grade). DIN 6319-D specifies a coned seat that lets the fixing sit at an angle, for joints where the bolt is...RRP From £19.98RRP From £19.98 -
10.5mm Spherical Washer DIN 6319-C A2 Stainless Steel
In stockThis 10.5 spherical Washer is manufactured to DIN 6319-C in A2 stainless steel (304 grade).Typical applications Workshop, maintenance, and repair work Machinery assembly and equipment mounting General fabrication and engineering Brackets, frames, and shelving systems Available...RRP From £13.10RRP From £13.10 -
10.5 X 29 Bonded Sealing Washer A2 Stainless Steel
In stockThis 10.5 x 29mm bonded sealing washer is manufactured in A2 stainless steel (304 grade). As the fastener is tightened the elastomer is compressed into the joint face and around the shank, forming a seal that...RRP From £8.62RRP From £8.62 -
1/4" Flat Washer, Table 3 Light BS 3410 A2 Stainless Steel
In stockThis 1/4" Form A flat washer is manufactured to BS 3410 in A2 stainless steel (304 grade). BS 3410 specifies the normal series flat washer - the standard size paired with the majority of metric bolt...RRP From £6.48RRP From £6.48 -
1/4" Rect Sect Spring Washer ANSI/ASME B18.21.1 A4 Stainless Steel
In stockThis 1/4" spring washer is manufactured to ANSI/ASME B18.21.1 in A4 stainless steel (316 grade). ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat...RRP From £17.76RRP From £17.76 -
1/2" Rect Sect Spring Washer ANSI/ASME B18.21.1 Stainless Steel
Out of stockThis 1/2" spring washer is manufactured to ANSI/ASME B18.21.1 in stainless steel. ANSI/ASME B18.21.1 specifies the imperial series of helical spring lock washers, for maintaining tension under vibration. The split ring compresses flat as the joint...RRP From £4.29RRP From £4.29
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.