---
product_id: 507380873
title: "3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc)"
brand: "boltigen"
price: "142 zł"
currency: PLN
in_stock: true
url: https://www.desertcart.pl/products/507380873-3-4-npt-male-air-compressor-oil-level-sight-glass
store_origin: PL
region: Poland
---

# Borosilicate Glass Max Temp 120°C 3/4'' NPT Thread 3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc)

**Brand:** boltigen
**Price:** 142 zł
**Availability:** ✅ In Stock

## Summary

> 🔍 See the Difference: Precision Meets Performance!

## Quick Answers

- **What is this?** 3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc) by boltigen
- **How much does it cost?** 142 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/507380873-3-4-npt-male-air-compressor-oil-level-sight-glass)

## 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

- • **Built to Last:** Crafted from solid brass and borosilicate glass for unmatched durability.
- • **Easy Installation:** 3/4'' MNPT thread conforms to U.S. industrial standards for a seamless fit.
- • **Temperature Resilience:** Operates flawlessly in extreme temperatures from -30°C to 120°C (-22°F to 248°F).
- • **Versatile Applications:** Ideal for air compressors, tanks, and automotive industries—your go-to liquid indicator.
- • **Pressure-Proof Performance:** Handles up to 435 PSI (30 Bar) with ease, ensuring reliability under pressure.

## Overview

This heavy-duty solid brass sight glass is designed for air compressors and various industrial applications, featuring a durable borosilicate glass window and a robust 3/4'' MNPT thread. It withstands high pressure and extreme temperatures, making it a reliable choice for visual inspection of liquids.

## Description

3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc)

## Features

- 【SOLID BRASS】The hydraulic tank sight glass is made of solid brass, the glass is boro silicate glass, and The O-ring is NBR, which is not easy to wear and burst compares to plastic material. It can work in different environments.
- 【Strong And Sturdy】Stainless Steel Oil Sight Glass Gauge Can Work Under Pressure 435 Psi (30 Bar) And Temperature -30-120c(-22-248f). The Sight Window Is Qualified To Pass Strict Pressure And Temperature Tests By Our Factory.
- 【THREAD SIZE】The thread of 3/4'' solid brass oil level sight glass is 3/4 inch MNPT thread which conforms to U.S. industrial standards,Please be sure to select the correct thread size before purchasing
- 【VERSATILE USE】The Stainless Steel Oil Sight Plug Is a Kind Of Liquid Indicator Used In Tanks, Air Compressors, Pumps, Piping systems, Automotive Industries, Lab Equipments, Bearing Housing And Mixers Etc. The Oil Level Indicator Has a Good Viewport For Visual Inspection Of Water, Oil, And Gas (Wog) to confirm whether oil meets the operating condition
- 【NOTE】: Get Your Air Compressor Shut Down And Pressure Relief When Change Oil Level Sight Glass. Please Check The Thread Type And Size Carefully Before Ordering

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Size | 3/4''NPT Flat--2Pc |
| Material | Glass |
| Brand | Boltigen |
| Connector Type | Plug |
| Thread Size | 3/4''NPT |
| Exterior Finish | Brass |
| Thread Type | NPT |
| Number of Pieces | 2 |
| Manufacturer | Boltigzen |
| Part Number | 342 |
| Item Weight | 4.6 ounces |
| Package Dimensions | 3.58 x 2.83 x 1.42 inches |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc) - Image 1](https://m.media-amazon.com/images/I/61Zu4SCt0+L.jpg)
![3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc) - Image 2](https://m.media-amazon.com/images/I/714nw3-DaIL.jpg)
![3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc) - Image 3](https://m.media-amazon.com/images/I/71xvld2wr8L.jpg)
![3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc) - Image 4](https://m.media-amazon.com/images/I/81oWnMpQs2L.jpg)
![3/4 Npt Male Air Compressor Oil Level Sight Glass Hex Head Heavy Duty Solid Brass Sight Glass Oil Liquid Level Gauge Oil Indicator Window Sight Glass for Air Compressor Gearbox (3/4''NPT Flat-2Pc) - Image 5](https://m.media-amazon.com/images/I/71sKGvDxLqL.jpg)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-10*