---
product_id: 379940669
title: "- 3/4 NPT Air compressor Oil Sight Glass, Male Hex Head Compresssor Oil Sight Glass, Heavy Duty Solid Brass Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Tank"
brand: "boltigen"
price: "$44"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/379940669-3-4-npt-air-compressor-oil-sight-glass-male-hex
store_origin: NZ
region: New Zealand
---

# 3mm tempered borosilicate glass for crystal-clear visibility Operates safely up to 120°C and 797 PSI pressure Durable solid brass body with wear-resistant NBR O-ring - 3/4 NPT Air compressor Oil Sight Glass, Male Hex Head Compresssor Oil Sight Glass, Heavy Duty Solid Brass Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Tank

**Brand:** boltigen
**Price:** $44
**Availability:** ✅ In Stock

## Summary

> 🔧 See Your Oil Like Never Before — Precision Meets Durability!

## Quick Answers

- **What is this?** - 3/4 NPT Air compressor Oil Sight Glass, Male Hex Head Compresssor Oil Sight Glass, Heavy Duty Solid Brass Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Tank by boltigen
- **How much does it cost?** $44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/379940669-3-4-npt-air-compressor-oil-sight-glass-male-hex)

## 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

- • **Rugged Brass Construction:** Solid brass housing resists corrosion and wear, guaranteeing long-lasting reliability.
- • **Crystal-Clear Oil Level Monitoring:** Tempered borosilicate glass ensures flawless, pressure-resistant visibility for precise fluid checks.
- • **Versatile Industrial Compatibility:** Ideal for air compressors, gearboxes, pumps, and automotive systems—your all-in-one liquid level solution.
- • **Built to Withstand Extreme Conditions:** Engineered to handle up to 797 PSI and 120°C, perfect for demanding industrial environments.
- • **Quality Assured with Risk-Free Purchase:** 100% inspected and backed by a full refund guarantee for total peace of mind.

## Overview

The 3/4 NPT Air Compressor Oil Sight Glass by Boltigen features a 3mm thick tempered borosilicate glass window housed in solid brass, designed to provide clear, reliable oil level visibility. Rated for up to 797 PSI and 120°C, it withstands harsh industrial conditions while the NBR O-ring ensures durability. Perfect for air compressors, gearboxes, and pumps, it undergoes rigorous quality control with a full refund guarantee on defects.

## Description

Sponsored Ad - 3/4 NPT Air compressor Oil Sight Glass, Male Hex Head Compresssor Oil Sight Glass, Heavy Duty Solid Brass Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Tank

## Features

- 【Good Transparent View 】The 3/4 NPT brass oil level sight glass with tempered glass which the thickness is 3mm , can provide you with a good transparent sight view and has a good has a good ability to withstand pressure, the compressor oil sight glass is also with baffle which help you can easily observe the change of medium.
- 【Temperature & Pressure】Air compressor oil sight glass gauge can work under 797 PSI (55 bar) and temperature 120 Celsius. The sight window is qualified to pass strict pressure and temperature tests by our factory.
- 【Material】The 3/4 NPT hydraulic tank sight glass is made of solid brass, the glass is borosilicate glass, The o-ring inside the oil sight glass is NBR , which is not easy to wear and burst compares to plastic material. It can work in different environment.
- 【Application】 The tank oil sight plug is a kind of liquid indicator used in tanks, air compressors, pumps, piping system, automotive industries, bearing housing and gearboxes etc. The oil level indicator has good viewport for visual Inspection of water, oil and gas (WOG).
- 【Service】 Our QC department do 100% quality inspection on the compressor oil sight glass before delivery. We will do 100% refund if the sight plug part is defective. Your valuable suggestions and advice will be greatly appreciated by our team.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Boltigen |
| Part Number | 4BSG |
| Item Weight | 2.39 ounces |
| Package Dimensions | 3.31 x 2.56 x 1.34 inches |
| Item model number | BSG003 |
| Size | 3/4'' NPT Flat |
| Color | 3/4'' Npt Flat |
| Material | Brass |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![- 3/4 NPT Air compressor Oil Sight Glass, Male Hex Head Compresssor Oil Sight Glass, Heavy Duty Solid Brass Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Tank - Image 1](https://m.media-amazon.com/images/I/61Q11EGEzUL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: will this fit model VT6362**
A: I don’t know. It is a standard NPT thread. It fit my compressor housing after I broke my original sight glass. This one is a 1/2” NPT so if that’s what yours is, it should fit

**Q: Could this be used as a radiator sight glass on a commercial truck radiator?**
A: I think it could be as long as its the right size and thread,

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.nz/products/379940669-3-4-npt-air-compressor-oil-sight-glass-male-hex](https://www.desertcart.nz/products/379940669-3-4-npt-air-compressor-oil-sight-glass-male-hex)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-26*