--- product_id: 733299667 title: "3/4\" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4\" NPT Male)" brand: "boltigen" price: "€ 6.02" currency: EUR in_stock: false url: https://www.desertcart.hr/products/733299667-3-4-npt-male-hex-head-stainless-steel-oil-sight store_origin: HR region: Croatia --- # Tempered borosilicate glass window -30 to 120°C temperature range 800 PSI pressure rating 3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) **Brand:** boltigen **Price:** € 6.02 **Availability:** ❌ Out of Stock ## Summary > 🔧 See your system’s heartbeat with crystal-clear precision! ## Quick Answers - **What is this?** 3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) by boltigen - **How much does it cost?** € 6.02 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/733299667-3-4-npt-male-hex-head-stainless-steel-oil-sight) ## Best For - boltigen enthusiasts ## Why This Product - Trusted boltigen brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Application Fit:** 3/4" NPT male thread fits hydraulic tanks, air compressors, pumps, and more for seamless integration - • **Industrial-Grade Durability:** 304 stainless steel body resists corrosion and wear for long-lasting performance - • **Precision Visual Monitoring:** Clear tempered borosilicate glass with red ball indicator ensures instant fluid level and condition checks - • **Quality Assured Reliability:** 100% factory pressure and temperature tested with premium NBR O-ring for leak-proof sealing - • **High Pressure & Temperature Tolerance:** Operates reliably up to 800 PSI and from -30°C to 120°C, perfect for demanding environments ## Overview This 3/4" NPT male hex head oil sight glass by Boltigen features a robust 304 stainless steel body and a tempered borosilicate glass window, designed to withstand pressures up to 800 PSI and temperatures from -30°C to 120°C. Equipped with a red ball indicator and durable NBR O-ring, it offers reliable, clear fluid level monitoring for hydraulic tanks, compressors, and industrial equipment, ensuring maintenance professionals never miss a critical update. ## Description 3/4 NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting Hydraulic Tank Sight Glass Product Name: Oil Level Sight Glass Product Color: Silver Product Material: Tempered Glass, Stainless Steel Product Model: 3/4-14NPT Thread Pitch: 1.814mm Features: - Effective in most operating environments - Visible oil color, transparency, water and other contaminants build up clearly. - Suitable for various liquids and adapts to varying levels of pressure. - Easy to install and long service life. Package: 1 x 3/4" MNPT Oil Sight Glass NPT Thread Size is a nominal pipe size and is not intended to represent the actual diameter. Please refer to the size chart for specific screw diameters. ## Features - 【TEMPERATURE AND PRESSURE】Stainless steel 3/4 NPT oil sight glass gauge works under pressure of 800 PSI (55 bar) and temperature -30-120C (-22-248F). Sight windows pass strict pressure and temperature testing in the factory - 【Superior Transparent View】3/4 NPT stainless steel oil level sight glass with tempered glass provides good transparent vision. Compressor Oil Sight Glasses come with baffles and red balls for easy viewing of media changes - Material: The hydraulic tank sight glass is made of 304 stainless steel, the glass is borosilicate glass, and the inner O-ring of oil sight glass is NBR and is less likely to wear and burst than plastic materials. Can be used in different environments - Applications: The compressor oil sight plug is a type of liquid indicators used in tanks, air compressors, pumps, plumbing systems, automotive industries, laboratory equipment, bearing housings, mixers, etc. Oil level indicator has a viewport suitable for visual inspection of water, petroleum, gas (WOG) - 【Service】Our quality control department conducts 100% quality inspection for stainless steel sight glasses before shipping. If there is a defective part of the sight plug part, we will refund you 100% Your valuable suggestions and advice will be greatly appreciated by our team ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Boltigen | | Package Dimensions | 6.2 x 5.21 x 4.19 cm; 68 g | | Color | Silver | | Are Batteries Included | No | | Item Weight | 68 g | ## Images ![3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) - Image 1](https://m.media-amazon.com/images/I/61wGLDKtgaL.jpg) ![3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) - Image 2](https://m.media-amazon.com/images/I/71-6iMShLmL.jpg) ![3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) - Image 3](https://m.media-amazon.com/images/I/71KlXcfZ4wL.jpg) ![3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) - Image 4](https://m.media-amazon.com/images/I/71Vv0H2J0DL.jpg) ![3/4" NPT Male Hex Head Stainless Steel Oil Sight Glass Fluid Level Gauge Oil Indicator Window Air Compressor Gearbox Fitting for Hydraulic Tank Sight Glass (3/4" NPT Male) - Image 5](https://m.media-amazon.com/images/I/71yjjunLe2L.jpg) ## Frequently Bought Together - 3/4'' NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Fittings Hydraulic Tank Sight Glass (3/4'' NPT Male) - EVIL ENERGY 3/4" NPT Female Weld on Bung Fitting Aluminum 2PCS --- ## 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.hr/products/733299667-3-4-npt-male-hex-head-stainless-steel-oil-sight](https://www.desertcart.hr/products/733299667-3-4-npt-male-hex-head-stainless-steel-oil-sight) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-14*