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APPROVED VENDOR Sealing Washer: M21 Screw Sz, Copper, Copper Seal, 21 mm Inside Dia, 28 mm Outside Dia - Single-Piece Sealing Washers
APPROVED VENDORSingle-Piece Sealing Washers

APPROVED VENDOR Sealing Washer: M21 Screw Sz, Copper, Copper Seal, 21 mm Inside Dia, 28 mm Outside Dia

The APPROVED VENDOR Sealing Washer (SKU 54FP98) is a single-piece copper sealing washer for M21 screw sizes, supplied in a 25-pack. It features a 21 mm inside diameter and 28 mm outside diameter, with a gray copper…

SKU 3G-OTH-534454

Brand
APPROVED VENDOR
Item
Sealing Washer: M21 Screw Sz, Copper, Copper Seal, 21 mm Inside Dia, 28 mm Outside Dia
Category
Single-Piece Sealing Washers
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
M50302.210.0028
Type
Copper, Copper Seal, 25 PK
Pack Size
Small Pack
Inside Dia
21 mm
Outside Dia
28 mm
Product Type
Sealing Washer
Seal Material
Copper
Seal Material Color
Gray
System of Measurement
Metric
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APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Sealing Washer (SKU 54FP98) is a single-piece copper sealing washer for M21 screw sizes, supplied in a 25-pack. It features a 21 mm inside diameter and 28 mm outside diameter, with a gray copper seal material. This metric sealing washer is part of a small pack, identified by manufacturer part number M50302.210.0028.

Frequently Asked Questions

What is an APPROVED VENDOR copper sealing washer used for?

This copper sealing washer is used to create a leak-proof seal between bolted joints, such as drain plugs and hydraulic fittings, in industrial machinery and fluid systems. The copper material compresses under torque to fill surface irregularities, preventing leaks in high-pressure or high-temperature applications.

What are the specifications of the APPROVED VENDOR M21 sealing washer?

This metric sealing washer has a 21 mm inside diameter and 28 mm outside diameter, designed for M21 screw sizes. It is made of copper with a gray seal material, supplied in a 25-pack small pack. The manufacturer part number is M50302.210.0028, and it is a single-piece sealing washer.

Where to buy APPROVED VENDOR sealing washers worldwide?

3G Electric supplies and delivers the APPROVED VENDOR sealing washer (SKU 54FP98) worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure reliable delivery to your facility. Contact us for availability and lead time on this copper sealing washer.

How to install a copper sealing washer for M21 bolts?

Clean the mating surfaces and ensure the bolt and washer are free of debris. Place the copper sealing washer over the M21 bolt, then tighten to the manufacturer's recommended torque specification. Copper washers are typically single-use; replace with a new washer each time the joint is disassembled to maintain a reliable seal.

Used in

Common applications for APPROVED VENDOR
Laboratory sampling — APPROVED VENDOR clear wide mouth glass bottles for collecting and storing liquid samples in non-sterile environments.
Steam heating maintenance — APPROVED VENDOR forged brass radiator valves for regulating steam flow in commercial building heating systems.
High-pressure cleaning — APPROVED VENDOR turbo spray nozzles for pressure washers used in industrial equipment cleaning up to 6,000 psi.
Cleanroom operations — APPROVED VENDOR vinyl task chairs for seating in ISO 5 classified manufacturing or assembly areas.
General sealing — APPROVED VENDOR natural rubber stoppers for closing laboratory flasks or test tubes in educational or research settings.
Tamper-evident security — APPROVED VENDOR brass lead and wire seals for securing utility meters, cargo containers, or access panels.

APPROVED VENDOR Products

3G Electric supplies APPROVED VENDOR single-piece sealing washers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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