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Metric Washers

The Westfield Fasteners range of metric washers is presented below. Each item is typically available in either box or sachet quantity for despatch from our warehouse today. Metric washers are designed to be used in conjunction with the equivalent sized metric bolts, screws and nuts.

Material Key
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.
BRASS	Brass - offers an attractive, corrosion resistant finish.
Bronze	Phosphor Bronze - normally used in conjunction with brass fasteners.
BZP	Bright Zinc Plated (BZP) Steel - non-stainless standard steel grade offering a basic level of corrosion resistance.
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.
Nylon	Nylon (polyamide) - a tough lightweight plastic, tough at low temperaures, with excellent resistance to chemicals and features a favourable sliding friction behaviour.

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Form A Washers ISO 7089 non chamfer & 7090 chamfered (DIN 125A)

A standard flat washer for use in just about any assembly. A flat washer's main task is to spread the load across a wider area, which comes in particularly useful when dealing with softer materials. Conforms to DIN 125.

BRASS

BZP

Duplex

Nylon

M2.5

M3.5

Form B Washers

A thinner thickness flat washer. Produced To BS 4320.

BRASS

Form C Washers

A rarer design of flat washer with a slightly larger external diameter than a DIN 125 standard form A flat washer. To BS 4320.

Penny Washers

Also known as a fender or repair washer, this very popular type offers a large external diameter. Often employed by plasterers, amongst others.

Washers ISO 7093 part 1 (DIN 9021)

A large diameter washer where the external diameter is typically three times that of the nominal internal diameter. Also known as Form G, and complies with DIN 9021.

BRASS

BZP

Duplex

Nylon

M3.5

Washer for Cheese Head Screws ISO 7092 (DIN 433)

A small diameter washer designed for use with screws with small diameter heads. To DIN 433.

Nylon

M2.5

Internal Serrated Lock Washers DIN6798

A toothed or perforated washer usually employed in electrical connections such as battery terminals, but can also be used in assemblies to help prevent loosening. This variant includes teeth on the internal diameter, which leaves a neater finish. Accords with DIN 6798J.

M3.5

External Serrated Lock Washer

A toothed or perforated washer usually employed in electrical connections such as battery terminals, but can also be used in assemblies to help prevent loosening. This variant includes teeth on the external diameter and therefore accords with DIN 6798A.

Bronze

M2.5

M3.5

Spring Washer

Spring washer designed to help prevent loosening of bolted joints under vibration. This type has a square section and is generally used with Socket Head Cap screws/bolts, manufactured to DIN 7980.

BZP

Rectangular Section Spring Washers DIN 127

Spring washer designed to help prevent loosening of bolted joints under vibration. This type has a rectangular section and is generally used on hexagon head bolted fixings, manufactured to DIN 127.

Bronze

Duplex

M2.5

Conical Spring Washers (Belleville Type) DIN 6796

Spring washer designed to help prevent loosening of bolted joints under vibration. This type is manufactured to DIN 6796 has an inherent conical shape. Also known as a Belleville washer, disc spring, coned-disc spring and cupped disc washer.

Wave Washers DIN 137

Wave profiled spring washer designed to help prevent loosening of bolted joints under vibration. To DIN 137.

M2.5

Square Plate Flat Washers DIN 436

Robust flat washer with a large square shape rather than the more usual round. Often used in timber construction and in applications at risk of seismic activity. To DIN 436.

Countersunk Washers

Machined washer designed to accomodate a countersunk headed screw. Offers an attractive finish when employed.

Conical Seat Washers (Type D)

Conical Seat Washers manufactured to DIN 6319 D. Perfect for using in clamping solutions of non parallel surfaces in conjunction with Spherical Washers or hexagon nuts with spherical seating (DIN 6330).

Spherical Washers (Type C)

Spherical Washers manufactured to DIN 6319 C. Perfect for using in clamping solutions of non parallel surfaces in conjunction with Conical Seat Washers.

Heavy Pattern Flat Washers DIN 7349

These washers, as the name suggests, are used in heavy duty applications. Much thicker than other forms of equivalent nominal sizes, tough and corrosion resistant with a larger outer diameter. Manufactured to DIN 7349 and used with bolts with heavy type spring pins, where a larger bearing surface area is required.

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