We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
Image not available
APPROVED VENDORSingle-Piece Sealing Washers

APPROVED VENDOR Sealing Washer: M12 Screw Sz, Copper, Copper Seal, 12 mm Inside Dia, 20 mm Outside Dia

The APPROVED VENDOR Single-Piece Sealing Washer (SKU 54FP65) is a copper seal for M12 screw sizes, with a 12 mm inside diameter and 20 mm outside diameter. Supplied in a small pack of 50, this metric sealing washer…

SKU 3G-OTH-534470

Brand
APPROVED VENDOR
Item
Sealing Washer: M12 Screw Sz, Copper, Copper Seal, 12 mm Inside Dia, 20 mm Outside Dia
Category
Single-Piece Sealing Washers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
M50301.120.0020
Type
Copper, Copper Seal, 50 PK
Pack Size
Small Pack
Inside Dia
12 mm
Outside Dia
20 mm
Product Type
Sealing Washer
Seal Material
Copper
System of Measurement
Metric
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Single-Piece Sealing Washer (SKU 54FP65) is a copper seal for M12 screw sizes, with a 12 mm inside diameter and 20 mm outside diameter. Supplied in a small pack of 50, this metric sealing washer is identified by manufacturer part number M50301.120.0020.

Frequently Asked Questions

What is an APPROVED VENDOR sealing washer used for?

This copper sealing washer is used to create a leak-proof seal under bolt heads or nuts in metric M12 fasteners. It is commonly applied in hydraulic, pneumatic, and fluid-handling systems where copper's malleability ensures a tight, reusable seal against vibration and pressure.

What are the specifications of the APPROVED VENDOR M50301.120.0020 sealing washer?

This sealing washer has a 12 mm inside diameter and 20 mm outside diameter, designed for M12 screw sizes. It is made of copper, supplied in a small pack of 50, and uses metric measurement. The manufacturer part number is M50301.120.0020.

Where to buy APPROVED VENDOR sealing washers worldwide?

3G Electric supplies APPROVED VENDOR sealing washers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us to order the M50301.120.0020 copper sealing washer in a 50-pack.

How to install a copper sealing washer for M12 fasteners?

Place the copper sealing washer between the fastener head and the mating surface. Tighten to the recommended torque for M12 bolts. Copper deforms slightly under compression, filling surface irregularities. Avoid over-tightening, which can extrude the washer and reduce sealing effectiveness.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from APPROVED VENDOR

View all APPROVED VENDOR parts →
Sealing Washer: M12 Screw Sz, Copper, Copper Seal, 12 mm Inside Dia, 16 mm Outside Dia, 50 PK (MPN M50301.120.0016). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.
APPROVED VENDOR
Sealing Washer: M12 Screw Sz, Copper, Copper Seal, 12 mm Inside Dia, 16 mm Outside Dia, 50 PK (MPN M50301.120.0016). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.
Bonded Sealing Washer: Neoprene, Black/Brown, 0.656 in Inside Dia, 1 5/16 in Outside Dia (MPN ZSW-76). Key specifications — Brand: APPROVED VENDOR; Compatible Product Type: For Use with Nut; Product Type: Sealing Washer; System of Measurement: Inch; X-Ray Detection: Not X-Ray Detectable; Seal Material: Neoprene; Seal Material Color: Black/Brown; FDA Approval: Not FDA Approved.
APPROVED VENDOR
Bonded Sealing Washer: Neoprene, Black/Brown, 0.656 in Inside Dia, 1 5/16 in Outside Dia (MPN ZSW-76). Key specifications — Brand: APPROVED VENDOR; Compatible Product Type: For Use with Nut; Product Type: Sealing Washer; System of Measurement: Inch; X-Ray Detection: Not X-Ray Detectable; Seal Material: Neoprene; Seal Material Color: Black/Brown; FDA Approval: Not FDA Approved.
Bonded Sealing Washer: Buna-N, Green, 0.5 in Inside Dia, 1 in Outside Dia, 1/16 in Max Thick (MPN ZSW-62). Key specifications — Brand: APPROVED VENDOR; Compatible Product Type: For Use with Nut; Product Type: Sealing Washer; System of Measurement: Inch; X-Ray Detection: Not X-Ray Detectable; Seal Material: Buna-N; Seal Material Color: Green; FDA Approval: Not FDA Approved.
APPROVED VENDOR
Bonded Sealing Washer: Buna-N, Green, 0.5 in Inside Dia, 1 in Outside Dia, 1/16 in Max Thick (MPN ZSW-62). Key specifications — Brand: APPROVED VENDOR; Compatible Product Type: For Use with Nut; Product Type: Sealing Washer; System of Measurement: Inch; X-Ray Detection: Not X-Ray Detectable; Seal Material: Buna-N; Seal Material Color: Green; FDA Approval: Not FDA Approved.
Sealing Washer: M10 Screw Sz, Copper, Copper Seal, 10 mm Inside Dia, 14 mm Outside Dia, 100 PK (MPN M50301.100.0014). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.
APPROVED VENDOR
Sealing Washer: M10 Screw Sz, Copper, Copper Seal, 10 mm Inside Dia, 14 mm Outside Dia, 100 PK (MPN M50301.100.0014). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.
APPROVED VENDOR
APPROVED VENDOR
Sealing Washer: M17 Screw Sz, Copper, Copper Seal, 17 mm Inside Dia, 24 mm Outside Dia, 25 PK (MPN M50302.170.0024). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Seal Material Color: Gray; Pack Size: Small Pack.
APPROVED VENDOR
APPROVED VENDOR
Sealing Washer: M22 Screw Sz, Copper, Copper Seal, 22 mm Inside Dia, 29 mm Outside Dia, 25 PK (MPN M50302.220.0029). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Seal Material Color: Gray; Pack Size: Small Pack.
APPROVED VENDOR
APPROVED VENDOR
Sealing Washer: M18 Screw Sz, Copper, Copper Seal, 18 mm Inside Dia, 24 mm Outside Dia, 25 PK (MPN M50301.180.0024). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.
Sealing Washer: M9 Screw Sz, Copper, Copper Seal, 9 mm Inside Dia, 14 mm Outside Dia, Copper, 100 PK (MPN M50301.090.0014). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.
APPROVED VENDOR
Sealing Washer: M9 Screw Sz, Copper, Copper Seal, 9 mm Inside Dia, 14 mm Outside Dia, Copper, 100 PK (MPN M50301.090.0014). Key specifications — Brand: APPROVED VENDOR; Product Type: Sealing Washer; System of Measurement: Metric; Seal Material: Copper; Pack Size: Small Pack.