Sourcing Industrial Parts? Just OKmarts!
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    Quote

    Fast Track to a Quote

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    • NKK Switch S21A
    • NKK Switch S21A
    • NKK Switch S21A
    • NKK Switch S21A
    1/4

    • Certification | Testing
      Factory Certified

    • Refund guarantee
      24h refund guarantee

    • Secure Payment
      PayPal Verified

    Brand New
    In Stock
    Best Seller

    NKK Switch S21A

    15 inquiries last 6 mos.
    US $ 16 .10 / ea
    Registered Members Enjoy Exclusive Discounts
    Join Now >
    Quantity
    20
    MOQ : 20

    Payment Methods

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    Need a Same-Day Quote?

    Send your PO or PDF list directly to our specialists now

    Need help confirming model compatibility?

    Get fast and efficient assistance from our experienced technical sales and customer service teams. No question is too small, and no problem is too big.
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    • 100% Original
      Genuine OEM Parts

    • Fast Delivery
      Shipped via FedEx / DHL / UPS

    • 12-Month Warranty
      Worry-Free Coverage

    • Secure Packaging
      Safe & Reliable

    • 5,000+ Global Suppliers
      Trusted by Professionals

    Professional Model-Matching System

    Send us your model numbers or nameplate details.
    We will match your request with our 5,000+ verified suppliers and issue a quotation.

    The NKK Switch is high quality!

    Why Global Buyers Choose O&Kmarts

    O&Kmarts:
    • Access to a wide range of SKUs across multiple brands and series
    • One RFQ connects you to 5,000+ global supplier quotes
    • Better availability for urgent and hard-to-find parts
    • Faster global delivery via FedEx / DHL / UPS
    • Easier access to rare and high-value models
    • Flexible sourcing for individual parts or complete solutions
    • Lower MOQs and more adaptable buying options
    • Multi-brand procurement in one order
    • OEM replacement and alternative model solutions available
    • Fewer intermediaries, ensuring more competitive pricing

    Why Global Buyers Choose O&Kmarts

    Local Suppliers:
    • Limited to fast-moving SKUs only
    • Limited local market availability
    • Inventory frequently fails to meet urgent demand
    • Long replenishment cycles, often taking weeks
    • Rarely stock high-value compressors (e.g. Copeland YHV119)
    • Frequently require bundled purchases
    • Rigid and difficult MOQ negotiations
    • Limited brand selection
    • Minimal or no customization capability
    • Higher local distribution and markup costs

    Top Questions from OKmarts Buyers

    • Q: How does OKmarts handle unexpected price fluctuations or tariff updates after an order is placed?

      A: Once a Proforma Invoice is issued and payment is confirmed, your pricing is legally locked. OKmarts absorbs any subsequent raw material price spikes, supplier price adjustments, or sudden export tariff increases, guaranteeing that the price you pay at checkout is final.

    • Q: What quality certificates or compliance documentation can be provided with the shipment?

      A: Upon request, we provide standard manufacturer compliance documentation, including Certificates of Conformance (CoC), factory inspection reports, and CE/RoHS certification data sheets to ensure alignment with international regulatory and safety standards.

    • Q: Can OKmarts provide specialized industrial packaging for sea freight or long-term tropical storage?

      A: Yes. For international shipping or extended warehouse storage in high-humidity regions, we offer upgraded industrial packaging options. This includes vacuum-sealed anti-static (ESD) barriers, desiccant packs, heavy-duty wooden crates, and shock-absorbent padding tailored to withstand harsh maritime transit conditions.

    S21A
    High Efficiency
    Stable Performance
    Long Service Life
    Explore More NKK Switch

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    Q&A

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    • Q: Do you offer price matching?

      A: We may offer price matching under certain conditions. If you find a lower price for the same product elsewhere, please contact our customer service team with the relevant details, and we will assess your request.

    • Q: How can I change my email address associated with my account?

      A: To change the email address associated with your account, please contact our customer service team and provide them with the necessary verification information. They will assist you in updating your email address.

    • Q: What payment methods does this e-commerce platform accept?

      A: We support 135+ currencies and dozens of payment options, including credit cards (Visa, MasterCard, AMEX cards, UnionPay, and Discover), TT (bank transfer), PayPal, Stripe, and more. You can contact our customer service team for any payment-related questions or concerns.


    Customer reviews

    4.6
    Based on 5 reviews
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    • Apr 29, 2026

      Jim Finnla
      Customer service is top-notch and always responds to my queries.
      Helpful?
      (0)
      (0)

    • May 21, 2025

      Thomas Ryan
      The solenoids shipped lightning fast, and the prices were hundreds of dollars less than anywhere else!
      Helpful?
      (0)
      (0)
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