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One hundred copper sealing washers M9 plain finish

Zoro Select

Zoro Select M50301.090.0014 Copper Sealing Washer M9 100 Pack

SKU CH-SDT8-Q9XMF

Copper sealing washers for M9 bolts, 9 mm inner and 14 mm outer diameter, 1.5 mm thick, pack of 100

  • Product typeWashers
  • Copper material resists corrosion in fluid systems
  • Annealed finish ensures reliable sealing under pressure
  • M9 inside diameter matches metric bolt specifications
  • 100-piece pack covers multiple assembly tasks
  • 5 mm thickness with tight tolerance maintains consistent compression

Copper M9 sealing washers 100 pack

These copper sealing washers suit M9 fasteners with a 9 mm inner diameter and 14 mm outer diameter. The pack contains one hundred annealed washers each 1.5 mm thick with a tolerance of plus or minus point two millimetres. They provide a plain finish seal for metric-threaded bolts in plumbing, automotive or general assembly work. The copper material conforms to the joint surface to resist leakage under pressure.

Annealed copper construction and pack quantity

Annealing softens the copper so each washer deforms evenly when tightened, creating a reliable seal without cracking. The plain finish adds no coating that could flake or contaminate fluid systems. One hundred pieces in a single box cover multiple service intervals or a small production run, reducing the need to reorder frequently. The consistent thickness ensures uniform clamp load across every joint.

Metric M9 fit with defined dimensional limits

The washers handle M9 bolts where a 9 mm bore and 14 mm flange diameter match the joint face. At 1.5 mm thickness they fill standard sealing grooves without over-compression. They run out when the application demands a larger outer diameter, a different inner size, or a thicker gasket for higher flange separation. The metric-only specification also means they do not suit imperial-threaded hardware.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $29.99
Pricier than about 61% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product typeWashers

Questions about this item

Will the copper sealing washers need periodic replacement under normal use?

Copper washers are single-use sealing items; once compressed to the 1.5 mm thickness they should be replaced rather than reused.

What dimensional limit is reached first when the washer is torqued repeatedly?

The thickness tolerance of +/- 0.2 mm around the 1.5 mm nominal thickness is the first limit encountered during repeated compression.

How much heat does a pack of 100 washers generate during continuous assembly work?

The washers are passive copper components; they produce no heat themselves during installation or operation.

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