--- product_id: 539579910 title: "Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8\")" brand: "generic" price: "฿2689" currency: THB in_stock: true url: https://www.desertcart.co.th/products/539579910-knob-for-bottle-jack-valve-release-screw-on-harbor-freight store_origin: TH region: Thailand --- # Extended knurled grip for control Fits 3/8" & 7/18" valve screws 6061 aircraft-grade aluminum Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") **Brand:** generic **Price:** ฿2689 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your hydraulic press game with precision and grip that won’t quit! ## Quick Answers - **What is this?** Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") by generic - **How much does it cost?** ฿2689 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/539579910-knob-for-bottle-jack-valve-release-screw-on-harbor-freight) ## Best For - generic enthusiasts ## Why This Product - Trusted generic brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ergonomic Knurled Grip:** Longer textured section guarantees a secure, slip-free hold even in demanding workshop conditions. - • **Dual Size Compatibility:** Perfectly fits both 3/8" and 7/18" valve release screws, ensuring versatile use across multiple hydraulic presses. - • **Quick 1/4 Turn Installation:** Effortlessly slides on and locks with a set screw for fast, reliable operation—Allen wrench included. - • **Exclusive Hydraulic Press Use:** Engineered specifically for Harbor Freight bottle jacks (6, 12 & 20 ton) to optimize press performance safely. - • **Precision Aircraft-Grade Aluminum:** Crafted from solid 6061 aluminum for unmatched durability and lightweight strength. ## Overview This knob for Harbor Freight hydraulic bottle jack valve release screws is machined from premium 6061 aircraft-grade aluminum, offering superior strength and lightweight handling. Designed to fit 3/8" and 7/18" diameter screws, it features an extended knurled grip for enhanced control and installs quickly with a 1/4 turn secured by a set screw. Ideal for 6, 12, and 20 ton arbor presses, this knob is a must-have upgrade for professionals seeking reliable, ergonomic hydraulic press operation. ## Description Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") ## Features - hydraulic jack valve release screw knob comes in two sizes to either the jack screw with a 3/8" and 7/18" diameter valve release screw - It is machined from a solid bar of 6061 aircraft quality aluminum, The knob also has a longer knurled section ,for extra grip. - It slides on over the release screw, turns 1/4 turn then secured in place with a set screw (included) from the end of the knob. You will need to use a 5/32 hex key (Allen wrench) - This particular part is designed for the Harbor Freight Hydraulic Bottle Jack used in the 6, 12 & 20 ton arbor presses but will work on any bottle jack with a 3/8 and 7/18" diameter valve release screw having a - DO NOT USE WHEN LIFTING VEHICLES: ONLY TO BE USED ON HYDRAULIC PRESS APPLICATIONS! ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | 3/8" 7/16" Knob | | Part Number | 3/8" 7/16" Knob | | Product Dimensions | 3.89 x 3.89 x 3.53 cm; 91 g | | Item model number | 3/8" 7/16" Knob | | Size | 3/8" | | Colour | Silver | | Included Components | Comes with housing | | Batteries included? | No | | Batteries Required? | No | | Item Weight | 91 g | ## Product Details - **Load capacity:** 20 tons - **Brand:** Generic - **Colour:** Silver - **Item dimensions L x W x H:** 39 x 39 x 35 millimetres - **Manufacturer:** 3/8" 7/16" Knob ## Images ![Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") - Image 1](https://m.media-amazon.com/images/I/51+8fXQh19L.jpg) ![Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") - Image 2](https://m.media-amazon.com/images/I/61g7iDXhEyL.jpg) ![Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") - Image 3](https://m.media-amazon.com/images/I/51kUfDFackL.jpg) ![Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") - Image 4](https://m.media-amazon.com/images/I/515ZPpsfqRL.jpg) ## Available Options This product comes in different **Size Name** options. ## Questions & Answers **Q: Will this fit the vevor 6 ton press** A: It should as long as it isn't the pinned style release valve on the jack. May want to measure the release valve first so you get the correct size. I guessed on mine and it was too small (not much but enough something would have to be modified) returned and ordered the larger size (for my press HF 20ton) and it fit perfect. Very well machined and makes the press easier to use. **Q: Will it work on the harbor freight 2 ton shop crane ( engine hoist ) .?** A: Yes it will, just buy the smaller sized screw hole. **Q: Will this work on the HF 8 Ton Bottle / Press?** A: Should fit, they all seem the same release valve. **Q: What is the diameter of the knurled section on the 3/8" model ?** A: 1-1/2” ## Frequently Bought Together - Knob for Bottle Jack Valve Release Screw On Harbor Freight Hydraulic Press Made of 6061 Aluminum (3/8") - Performance Tool W41065 6-Piece Shop Press Accessory Kit for Presses Up to 50-ton - 12" Press Brake Attachment/Press Brake Attachment For Standard 12/20 Ton Hydraulic Shop Presses --- ## 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.co.th/products/539579910-knob-for-bottle-jack-valve-release-screw-on-harbor-freight](https://www.desertcart.co.th/products/539579910-knob-for-bottle-jack-valve-release-screw-on-harbor-freight) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-24*