--- product_id: 282147041 title: "(2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze" brand: "tuna" price: "¥9322" currency: JPY in_stock: true reviews_count: 1 category: "Tuna" url: https://www.desertcart.jp/products/282147041-2-pack-fm-approved-and-ul-cul-listed-tuna-fire store_origin: JP region: Japan --- # K=5.6 flow coefficient 155°F activation temp UL/FM certified safety (2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze **Brand:** tuna **Price:** ¥9322 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of danger with certified, precision fire protection! ## Quick Answers - **What is this?** (2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze by tuna - **How much does it cost?** ¥9322 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/282147041-2-pack-fm-approved-and-ul-cul-listed-tuna-fire) ## Best For - tuna enthusiasts ## Why This Product - Trusted tuna brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Fit:** 1/2” NPT threading for seamless integration with standard systems - • **Optimal Water Flow:** K=5.6 discharge coefficient ensures effective fire suppression - • **Durable Bronze Build:** Robust bronze construction for long-lasting performance - • **Certified Reliability:** FM Approved & UL/CUL Listed for trusted safety standards - • **Precision Thermal Activation:** Triggers at 155°F (68°C) for rapid fire response ## Overview This (2 Pack) Tuna Fire Sprinkler Head features FM Approval and UL/CUL Listing, ensuring top-tier safety compliance. Designed with a 155°F (68°C) thermal-sensitive glass bulb and a K=5.6 discharge coefficient, it delivers rapid and efficient fire suppression. Crafted from durable bronze with 1/2” NPT threading, it fits standard automatic sprinkler systems and withstands pressures up to 175 psi, making it a reliable choice for professional-grade fire safety. ## Description During a fire conditions, the thermal-sensitive liquid in the glass bulb expands, causing the bulb to shatter, releasing the button and spring seal assembly. Water flowing through the sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern to extinguish or control the fire.Temperature Rating: 155°F (68°C)Discharge Coefficient: K=5.6(U.S) /80(Metric) Nominal Orifice Size:1/2"(15mm) Maximum Working Pressure:175psi(12bar) Min. Operating Pressure: 7psi (0.48bar) Factory Hydrostatic Test: 100%@ 500psi (34.5bar) NPT: National Pipe Tapered is common in plumbing and some industrial uses. Sometimes referred to as pipe thread because PVC pipe and schedule 40 pipe are typically threaded in NPT. As its name implies this is a tapered thread so that the outside diameter of the male (ODM) gets smaller towards the end of the fitting and the inside diameter of the female narrows with depth. As the two fittings are threaded together the opposite tapers force thread friction and makes the seal without the use of a gasket. Review: This product is excellent! It shipped fast! ## Features - FM Approved 3053441and UL / CUL listed EX6430. 1/2 " NPT (National National Pipe Thread) American thread fire sprinkler heads - Underwriter Laboratories Listed, UL(United States) and ULC(Canada) Listed - Nominal 5.6 K-Factor fire sprinkler heads, Dia5mm Glass Bulb Standard Response 155F 68C - Max working pressure 175psig /1.2Mpa(12 bar);Factory Hydrostatic Test 100%@ 500psig (3.4Mpa) - Automatic sprinklers of the frangible bulb type ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08NYGYCCW | | Batteries Included? | No | | Batteries Required? | No | | Brand | Tuna | | Customer Reviews | 4.6 4.6 out of 5 stars (29) | | Date First Available | December 30, 2020 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 4.6 ounces | | Item dimensions L x W x H | 1.3 x 1.3 x 1.97 inches | | Item model number | NX023 | | Material | Bronze | | Maximum Flow Rate | 5.6 Gallons Per Minute | | Maximum Pressure | 175 Pound per Square Inch | | Part Number | NX023B2 | | Pattern | NX023 2 Pack | | Product Dimensions | 1.3 x 1.3 x 1.97 inches | | Style | Automatic | | UPC | 705124113376 | ## Product Details - **Brand:** Tuna - **Item dimensions L x W x H:** 1.3 x 1.3 x 1.97 inches - **Material:** Bronze - **Maximum Pressure:** 175 Pound per Square Inch - **Style:** Automatic ## Images ![(2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Image 1](https://m.media-amazon.com/images/I/81+yu7-BarL.jpg) ![(2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Image 2](https://m.media-amazon.com/images/I/71IaRPqPuBS.jpg) ![(2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Image 3](https://m.media-amazon.com/images/I/51C1db-xOOS.jpg) ![(2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Image 4](https://m.media-amazon.com/images/I/61A+SDVNw6S.jpg) ![(2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Image 5](https://m.media-amazon.com/images/I/71fXyLGaZxL.jpg) ## Available Options This product comes in different **Pattern** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***S on December 10, 2020* This product is excellent! It shipped fast! ## Frequently Bought Together - (2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Metal Magery Fire Sprinkler Spare Cabinet 6 Head Box for 1/2" and 3/4" Sprinkler Heads - (2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155°F (68°C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome --- ## 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.jp/products/282147041-2-pack-fm-approved-and-ul-cul-listed-tuna-fire](https://www.desertcart.jp/products/282147041-2-pack-fm-approved-and-ul-cul-listed-tuna-fire) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-19*