--- product_id: 281453184 title: "Hitachi 371208 J-394 Reduction Valve Set 16Gant1865Dm Nr1890Dc Nr1890Dr" price: "$3.99" currency: USD in_stock: false reviews_count: 13 url: https://www.desertcart.us/products/281453184-hitachi-371208-j-394-reduction-valve-set-16gant1865dm-nr1890dc-nr1890dr store_origin: US region: United States of America --- # Genuine Hitachi replacement part Durability tested for long life Precision-engineered valve set Hitachi 371208 J-394 Reduction Valve Set 16Gant1865Dm Nr1890Dc Nr1890Dr **Price:** $3.99 **Availability:** ❌ Out of Stock ## Summary > ⚡ Upgrade your air hammer game with Hitachi’s precision valve set! ## Quick Answers - **What is this?** Hitachi 371208 J-394 Reduction Valve Set 16Gant1865Dm Nr1890Dc Nr1890Dr - **How much does it cost?** $3.99 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/281453184-hitachi-371208-j-394-reduction-valve-set-16gant1865dm-nr1890dc-nr1890dr) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Compatibility:** Fits perfectly with Hitachi air hammers for hassle-free installation - • **Durability You Can Trust:** Rigorously tested to withstand demanding job site conditions - • **Engineered for Excellence:** Crafted to Hitachi’s highest standards ensuring peak performance - • **Boost Your Tool’s Lifespan:** Replace worn valves to maintain optimal air hammer efficiency - • **Swift Delivery, Instant Upgrade:** Fast dispatch means less downtime and more productivity ## Overview The Hitachi 371208 J-394 Reduction Valve Set is a genuine, precision-engineered replacement part designed specifically for Hitachi air hammers. Crafted from durable materials and rigorously tested for performance, this compact valve set ensures seamless compatibility and extends the lifespan of your power tool. Ideal for professionals seeking reliable, high-quality maintenance components to keep their tools operating at peak efficiency. ## Description Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality. Review: Food - Fit perfectly and easy to work with it Review: Great product. - Great product, works exactly as intended. It was dispatched and received promptly. ## Features - Hitachi 371208 J-394 Reduction Valve Set 16Gant1865Dm Nr1890Dc Nr1890Dr - Hitachi genuine part - Replacement part ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B079SQV3XT | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #398,140 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4,724 in Power Tool Replacement Parts | | Customer Reviews | 4.4 4.4 out of 5 stars (198) | | Date First Available | February 13, 2018 | | Finish | Brushed | | Included Components | Hitachi 371208 J-394 REDUCTION VALVE SET 16GANT1865DM NR1890DC NR1890DR | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 4.2 ounces | | Item model number | 371208 | | Manufacturer | Koki Holdings America, Ltd | | Material | Blend | | Measurement System | Metric | | Part Number | 371208 | | Pattern | Solid | | Power Source | hand_powered | | Product Dimensions | 1 x 1 x 1 inches | | Shape | Rectangular | ## Images ![Hitachi 371208 J-394 Reduction Valve Set 16Gant1865Dm Nr1890Dc Nr1890Dr - Image 1](https://m.media-amazon.com/images/I/710usZRWY7L.jpg) ## Questions & Answers **Q: Do you have instructions on how to use this?** A: Here's a video with step by step instructions. This was produced by the Metabo HPT Service Department. https://www.youtube.com/watch?v=ii_L82J8WbU **Q: What pressure for the 18g hpt finishing gun (nt1850de)?** A: The pressure for NT1850DE is 50.7 psi. It would be best if you used regulator 371209 instead of 371208. Set your compressor @ 110psi. The regulator should set the pressure automatically. The regulator 371208 is set at 72.5 psi which is incorrect for your tool model. **Q: Is this the correct guage for my Hitachi 15 Gauge angled finish nailer ?** A: Not sure exactly the Hitachi model you are referring to, but if your nailer model is NT1865DMA, you will need to use the 371210 regulator. **Q: Is this the regulator for refilling the metabo hpt cordless 18v multivolt™ straight finish nailer model nt1865dmst ?** A: Yes, it is. I have the Hikoki 16Ga NT1865 DBSL. It's the same nailer as your's, just another model number for Europe. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Food *by R***O on February 11, 2026* Fit perfectly and easy to work with it ### ⭐⭐⭐⭐⭐ Great product. *by I***Y on May 19, 2025* Great product, works exactly as intended. It was dispatched and received promptly. ### ⭐⭐⭐⭐ Worked as intended in restoring my nailer to normal function *by B***N on September 13, 2025* It worked quite well in restoring my nailer from being unable to properly sink nails even in softwood. The only downside I had with this tool is how much you may tighten it down. There is a nibble on the end which opens a valve on the nailer but when I checked it afterwards it had become bent. Otherwise I can highly recommend this tool if you want to be able to restore your nailer by yourself. It’s a bit pricey yes but it’s also not cheap to send it for repair each time it needs some air refill. ## Frequently Bought Together - Hitachi 371208 J-394 Reduction Valve Set 16Gant1865Dm Nr1890Dc Nr1890Dr - Metabo HPT Extended Magazine for 21 Degree Cordless Framing Nailers | Fits models - NR1890DRS, NR1890DRSQ7, NR1890DRST, NR3690DR | 379048M - Metabo HPT MultiVolt Battery | 36V/18V, 4.0 Ah/8.0 Ah, Lithium Ion, Slide Style | 372121M --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/281453184-hitachi-371208-j-394-reduction-valve-set-16gant1865dm-nr1890dc-nr1890dr](https://www.desertcart.us/products/281453184-hitachi-371208-j-394-reduction-valve-set-16gant1865dm-nr1890dc-nr1890dr) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-19*