--- product_id: 170630221 title: "Macnaught KY Plus Locking Safety Grease Coupler - Smallest Diameter Bore on Market - 2 Year Warranty" brand: "macnaught" price: "KD 16.37" currency: KWD in_stock: true reviews_count: 13 category: "Macnaught" url: https://www.desertcart.com.kw/products/170630221-macnaught-ky-plus-locking-safety-grease-coupler-smallest-diameter-bore store_origin: KW region: Kuwait --- # Smallest diameter bore on market Patented locking safety mechanism Handles up to 10,000 PSI pressure Macnaught KY Plus Locking Safety Grease Coupler - Smallest Diameter Bore on Market - 2 Year Warranty **Brand:** macnaught **Price:** KD 16.37 **Availability:** βœ… In Stock ## Summary > πŸ”§ Lock in safety, unlock productivity β€” the grease coupler that means business. ## Quick Answers - **What is this?** Macnaught KY Plus Locking Safety Grease Coupler - Smallest Diameter Bore on Market - 2 Year Warranty by macnaught - **How much does it cost?** KD 16.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/170630221-macnaught-ky-plus-locking-safety-grease-coupler-smallest-diameter-bore) ## Best For - macnaught enthusiasts ## Why This Product - Trusted macnaught brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact Precision Fit:** Smallest diameter bore lets you access the tightest grease fittings effortlessly. - β€’ **One-Handed Efficiency:** True one-handed design speeds up your maintenance workflow with ease. - β€’ **Unmatched Safety Lock:** Patented release mechanism ensures leak-free, secure connections every time. - β€’ **Confidence Backed by Warranty:** Built tough with a 2-year warranty for peace of mind on every job. - β€’ **Pressure-Resistant Durability:** Internal pressure relief protects against high-pressure grease blowouts up to 10,000 PSI. ## Overview The Macnaught KY Plus Locking Safety Grease Coupler features a patented release mechanism for enhanced safety and leak-free operation, combined with the smallest diameter bore on the market for superior access in tight spaces. Designed for true one-handed use and built to withstand pressures up to 10,000 PSI, it offers professional-grade durability backed by a 2-year warranty. ## Description Buy Macnaught KY Plus Locking Safety Grease Coupler - Smallest Diameter Bore on Market - 2 Year Warranty: Release Aids - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: smallest locking grease coupler - After tired replacing my grease gun coupler many times with generic non-locking grease couplers (the claws eventually got loose after so many cartridges), I decided to get a locking one, and I knew I want the smallest I could get because of tight space, this coupler works perfectly for my job. Many people who don't know how to use it gave bad reviews, well that's understandable because: Need to loosen it up first - When still new, the coupler is very stiff and can 'bind' to your grease fitting unable to release even after I tried the tips from someone below, after some 'percussion maintenance' and swinged it back and forth, the coupler started to loose up. After it has loosen up, the operation is very smooth, I'm now able to release it every time. I suggest you do this first with a grease fitting that has lots of space and easy to reach, you only need to do it once. I think it's because it has complex locking mechanism unlike locking coupler from other brands. Another quirk is, the orange o-ring I think is only for indicator, it detached easily, useless, I don't bother to put it back, they should just omit the o-ring and use laser engraving instead. Review: So far, so great! - I manage an environmental business. I also happen to be the resident diesel mechanic and maintenance tech. Twice a week I grease: 3 track hoes, a skid steer, a Komptech industrial grinder, 3 dump trucks, and 2 30,000 lbs tri-axle trailers. I've only put a few tubes of grease with this coupler... since I just got it two days ago. This thing is awesome! I had been using a Lu-Max. It was decent, but would leak if you let go of it. The MacNaught takes a little getting used to. Sometimes I have to "double clutch" it. But, it locks on very snug, and hasn't leaked once. Yet, anyway. But, all the other locking coupler I used will leak some... right out of the box. I love the thing. And it's very well built. All metal construction. And even though the Lu-Max would fit every recess that I have tried... the MacNaught is even thinner, so I can't imagine that I'll find a zirk that I can't access. Time will tell about durability. But it does havea 2 year warranty. I highly recommend. ## Features - Macnaught’s Patented Release Mechanism Delivers Enhanced Safety and is Both Easier and Faster To Use. The KY+ Retains the Benefit of the Original Floating Jaw Design, Providing a Strong, Leak-Free Connection while Improving Safety and Usability -- Two-year warranty! - Locks On Tight and Self Assists Off the Fitting. - True One-Handed Design – Easy to Use. - Compact Barrel Diameter – Smallest diameter on the market today. - Internal pressure relief reduces the risk of high-pressure grease release at 10,000 PSI. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07Z2TT298 | | Best Sellers Rank | #158,686 in Automotive ( See Top 100 in Automotive ) #283 in Grease Guns #283 in Power Tool Lubricants | | Brand | Macnaught | | Brand Name | Macnaught | | Color | Gray | | Connector Type | Coupling | | Customer Reviews | 3.9 out of 5 stars 365 Reviews | | Exterior Finish | Metal | | Included Components | Locking Safety Grease Coupler | | Item Dimensions | 0.11 x 0.03 x 0.17 inches | | Item Weight | 3.04 ounces | | Item dimensions L x W x H | 0.11 x 0.03 x 0.17 inches | | Manufacturer | MACNAUGHT USA Inc | | Manufacturer Part Number | KYPLUS-02 | | Manufacturer Warranty Description | 2 | | Material | Metal | | Material Type | Metal | | Model Number | KYPLUS-02 | | Number of Pieces | 1 | | Size | 1/8 NPT(F) Inlet | | Thread Size | 1/8 NPT | | Thread Type | NPT | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Macnaught - **Color:** Gray - **Connector Type:** Coupling - **Exterior Finish:** Metal - **Item Weight:** 0.19 Pounds - **Item dimensions L x W x H:** 0.11 x 0.03 x 0.17 inches - **Material:** Metal - **Size:** 1/8 NPT(F) Inlet - **Thread Size:** 1/8 NPT - **Thread Type:** NPT ## Images ![Macnaught KY Plus Locking Safety Grease Coupler - Smallest Diameter Bore on Market - 2 Year Warranty - Image 1](https://m.media-amazon.com/images/I/61la-N6YcML.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ smallest locking grease coupler *by R***. on March 26, 2023* After tired replacing my grease gun coupler many times with generic non-locking grease couplers (the claws eventually got loose after so many cartridges), I decided to get a locking one, and I knew I want the smallest I could get because of tight space, this coupler works perfectly for my job. Many people who don't know how to use it gave bad reviews, well that's understandable because: Need to loosen it up first - When still new, the coupler is very stiff and can 'bind' to your grease fitting unable to release even after I tried the tips from someone below, after some 'percussion maintenance' and swinged it back and forth, the coupler started to loose up. After it has loosen up, the operation is very smooth, I'm now able to release it every time. I suggest you do this first with a grease fitting that has lots of space and easy to reach, you only need to do it once. I think it's because it has complex locking mechanism unlike locking coupler from other brands. Another quirk is, the orange o-ring I think is only for indicator, it detached easily, useless, I don't bother to put it back, they should just omit the o-ring and use laser engraving instead. ### ⭐⭐⭐⭐⭐ So far, so great! *by T***R on August 13, 2025* I manage an environmental business. I also happen to be the resident diesel mechanic and maintenance tech. Twice a week I grease: 3 track hoes, a skid steer, a Komptech industrial grinder, 3 dump trucks, and 2 30,000 lbs tri-axle trailers. I've only put a few tubes of grease with this coupler... since I just got it two days ago. This thing is awesome! I had been using a Lu-Max. It was decent, but would leak if you let go of it. The MacNaught takes a little getting used to. Sometimes I have to "double clutch" it. But, it locks on very snug, and hasn't leaked once. Yet, anyway. But, all the other locking coupler I used will leak some... right out of the box. I love the thing. And it's very well built. All metal construction. And even though the Lu-Max would fit every recess that I have tried... the MacNaught is even thinner, so I can't imagine that I'll find a zirk that I can't access. Time will tell about durability. But it does havea 2 year warranty. I highly recommend. ### ⭐ Two new, out of the box, defective *by B***. on June 20, 2022* I purchased two of these within the past two weeks and both came out of the box inoperable. First one I pressed on to a driveshaft zerk and would not come off. It would not release because the mechanism was busted. I was desperate to find a narrow, easy to attach/release grease fitting so took a chance and bought another one thinking maybe I was just unlucky. Nope. 2nd new McNaught unit, out of the box, pulling on the catch and release action handle did nothing. It, too, was defective. A complete time and money waste. Now I have to chase after Amazon to refund me my expedited shipping per McNaught's customer service. Thanks for nothing! ## Frequently Bought Together - Macnaught KY Plus Locking Safety Grease Coupler - Smallest Diameter Bore on Market - 2 Year Warranty - LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable tool. - LockNLube Pressure Return Valve for Use with Cordless Grease Guns. No More Pressure Locks! Returns Grease to The Tube. Releases Hose backpressure. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.kw/products/170630221-macnaught-ky-plus-locking-safety-grease-coupler-smallest-diameter-bore](https://www.desertcart.com.kw/products/170630221-macnaught-ky-plus-locking-safety-grease-coupler-smallest-diameter-bore) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-06-21*