---
product_id: 39336492
title: "Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green)"
brand: "marine bolt supply"
price: "₨540"
currency: SCR
in_stock: true
reviews_count: 13
category: "Marine Bolt Supply"
url: https://www.desertcart.sc/products/39336492-nut-bolt-and-screw-gauge-standard-and-metric-coarse-fine
store_origin: SC
region: Seychelles
---

# Durable 1/4" thick plastic Measures standard & metric sizes Checks coarse & fine thread pitches Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green)

**Brand:** marine bolt supply
**Price:** ₨540
**Availability:** ✅ In Stock

## Summary

> 🔧 Nail every project with precision—your ultimate nut, bolt & screw sidekick!

## Quick Answers

- **What is this?** Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green) by marine bolt supply
- **How much does it cost?** ₨540 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/39336492-nut-bolt-and-screw-gauge-standard-and-metric-coarse-fine)

## Best For

- marine bolt supply enthusiasts

## Why This Product

- Trusted marine bolt supply brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **DIY Game-Changer:** Save time and avoid costly mistakes by verifying sizes before you buy or install.
- • **Compact & Portable:** Sleek 8.75" x 3.25" design fits in your toolkit or pocket for on-the-go accuracy.
- • **Thread Pitch Mastery:** Effortlessly distinguish coarse vs fine threads with built-in pitch gauges—no guesswork, no returns.
- • **Trusted by Pros & Makers:** Top-rated by engineers and mechanics for reliability and ease of use.
- • **Universal Precision Sizing:** Instantly identify nut, bolt & screw sizes from #4 to 1" (standard) and 3mm to 22mm (metric).

## Overview

This green Nut, Bolt & Screw Gauge by MarineBoltSupply is a durable, 1/4" thick plastic tool designed to measure standard and metric fasteners, including diameters, lengths, and thread pitches. It covers fractional sizes from #4 to 1" and metric sizes from 3mm to 22mm, with a compact 8.75" x 3.25" footprint. Featuring both coarse and fine thread pitch gauges, it streamlines fastener identification for DIYers and professionals alike, reducing errors and saving time on hardware runs.

## Description

This is a top quality gauge for checking size and thread pitch of screws, bolts & nuts. Works with fractional (standard) or metric screws & bolts. fractional screw/bolt size range: (#4 to 1") metric screw/bolt size range: (3mm to 22mm) standard lengths up to 7" and metric lengths up to 180mm. fractional nuts from #6 to 5/8". Made of 1/4" thick hard very durable plastic. It's 8-3/4" long and 3-1/4" wide.

Review: Great product and price for DIY engineers and mechanics - I do a lot of DIY engineering and mechanical projects and I waste a ton of time hunting the right size nut, screw, bolt, etc. This simple, well-made sizing tool is one of the absolute best aids I have ever bought. I even take it with me to Home Depot and Lowes to make sure I'm getting the correct product size...no returns or multiple trips for mis-matched sizes. Thank you to whomever created and sells this product.
Review: Don't let the 'meh' reviews deceive you. - I hesitated to buy this thing, because while the overall review score is good, the 'Top Reviews' paint a different picture. I'm glad I bought it anyway. Wanted to respond to some of the issues other reviewers had: "Very small and there aren't any threads in the holes or the pegs that are supposed to measure nuts" If 7 inches is very small, then a lot of dudes are in trouble, myself included. It's true, the holes and pegs are not threaded. It's made of plastic, that would work maybe half a dozen times before they deformed and were no longer accurate. Instead, there is a thread gauge on the back for bolts/screws, and the pegs for nuts define thread pitch by whether or not they fit completely over it. If they can't clear the 'shoulder' of the peg halfway down, they're coarse pitch. If they can, they're fine pitch. Then just look at the conversion table printed right there on the front of the thing and boom you got your thread count. Unless you're working on NASA equipment, this will solve most any dilemma you're having with your nuts (lol) "Has no way to check the thread pitch of nuts... only their inner bore diameter." The info is right there on the unit...fit the nut to the peg, note and size and if it's coarse or fine pitch, and look at the conversion table. Metric and standard. "I need one that will define what sort of thread a given bolt happens to have, e.g., how many threads per inch? " On the back side, there's a metric and US thread pitch gauges. I'm more used to using the ones at the hardware store that are set up where you actually thread it into a hole, but this tool is easier in my opinion. The way to use it is to press the bolt on top of each gauge and try giving it a little nudge to the lateral side. If it's not a match, the bolt will kinda jitter off the plastic. When you get a match, it will 'bite' the threads and won't budge. You'll know it when you hit the sweet spot, trust me. It's easier this way because once at the hardware store I accidentally used a US bolt on the metric hole and it got locked up in there. Had to flag down an employee and have him get it out using tools. Anyway, I think this gauge is pretty useful for the DIY crowd and the price is right for most of us. It's pretty bad when misleading reviews get upvotes. This one will probably get downvoted, but I hope it helps at least one person who kept scrolling down.

## Features

- Top Quality Nut, Bolt & Screw Gauge; For Use With Standard or Metric, Coarse & Fine Diameters, Lengths & Thread Pitches
- This gauge has 'MarineBoltSupply' printed on the back
- Package Dimensions: 8.75 inch L x 3.25 inch W x 0.25 inch H
- Package weight of the Product: 2.36 ounces

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06X15YV6X |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #27,697 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #75 in Nut & Bolt Assortment Sets |
| Brand | Marine Bolt Supply |
| Color | Green |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,811) |
| Cutting Diameter | 1 Inches |
| Date First Available | February 10, 2017 |
| Fastener Type | Nuts |
| Finish | Unfinished |
| Head Style | Hex |
| Head Type | Hex |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 1 Inches |
| Item Hardness | thick hard |
| Item Package Quantity | 1 |
| Item Weight | 2.08 ounces |
| Item model number | 1-NBG |
| Manufacturer | CMC Industrial Supply |
| Manufacturer Grade | Grade 2 |
| Material | Plastic |
| Measurement System | Inch, Metric, inch_and_metric |
| Number of Pieces | 1 |
| Part Number | 1-NBG |
| Shape | Rectangular |
| Size | 1/2-13 UNC |
| Thread Class | 3B |
| Thread Style | Right Hand |
| Thread Type | Unc |

## Product Details

- **Color:** Green
- **Fastener Type:** Nuts
- **Head Style:** Hex
- **Manufacturer Grade:** Grade 2
- **Material:** Plastic

## Images

![Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green) - Image 1](https://m.media-amazon.com/images/I/715V6ot6k-L.jpg)

## Available Options

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

## Questions & Answers

**Q: Where is the size 12? this product appears to skip 12 and go from size 10 to 1/4?**
A: #12 is not 1/4"---imperial machine screw sizes are in 64th's---
Therefore, #12 = 12/64 = 6/32 = 3/16---NOT 1/4

**Q: I thought it supposed to have thread in it**
A: This is a thread gauge. The thread gauge is on the back side of the gauge. One of the listing pictures clearly shows this.

**Q: How does this tool define internal thread pitch (e.g. nuts)?**
A: This gauge doesn't measure "internal" threads, only external threads. It can find the size of a nut but not the thread pitch of a nut. However, if you know the size of the nut then it's pretty easy to determine the thread pitch. There's only two thread options per size so just look at the threads and you can see if it's the coarse thread or fine thread. For instance, if the gauge determines that the nut is 1/2" then your two thread options are 13 or 20. The gauge shows you that part. If the threads look fine then you have a 20 thread if it looks coarse then you have a 13 thread. Hope this helps.

**Q: Where is gauge made?**
A: Nice sturdy plastic.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product and price for DIY engineers and mechanics
*by K***R on April 4, 2025*

I do a lot of DIY engineering and mechanical projects and I waste a ton of time hunting the right size nut, screw, bolt, etc. This simple, well-made sizing tool is one of the absolute best aids I have ever bought. I even take it with me to Home Depot and Lowes to make sure I'm getting the correct product size...no returns or multiple trips for mis-matched sizes. Thank you to whomever created and sells this product.

### ⭐⭐⭐⭐⭐ Don't let the 'meh' reviews deceive you.
*by R***U on November 21, 2019*

I hesitated to buy this thing, because while the overall review score is good, the 'Top Reviews' paint a different picture. I'm glad I bought it anyway. Wanted to respond to some of the issues other reviewers had: "Very small and there aren't any threads in the holes or the pegs that are supposed to measure nuts" If 7 inches is very small, then a lot of dudes are in trouble, myself included. It's true, the holes and pegs are not threaded. It's made of plastic, that would work maybe half a dozen times before they deformed and were no longer accurate. Instead, there is a thread gauge on the back for bolts/screws, and the pegs for nuts define thread pitch by whether or not they fit completely over it. If they can't clear the 'shoulder' of the peg halfway down, they're coarse pitch. If they can, they're fine pitch. Then just look at the conversion table printed right there on the front of the thing and boom you got your thread count. Unless you're working on NASA equipment, this will solve most any dilemma you're having with your nuts (lol) "Has no way to check the thread pitch of nuts... only their inner bore diameter." The info is right there on the unit...fit the nut to the peg, note and size and if it's coarse or fine pitch, and look at the conversion table. Metric and standard. "I need one that will define what sort of thread a given bolt happens to have, e.g., how many threads per inch? " On the back side, there's a metric and US thread pitch gauges. I'm more used to using the ones at the hardware store that are set up where you actually thread it into a hole, but this tool is easier in my opinion. The way to use it is to press the bolt on top of each gauge and try giving it a little nudge to the lateral side. If it's not a match, the bolt will kinda jitter off the plastic. When you get a match, it will 'bite' the threads and won't budge. You'll know it when you hit the sweet spot, trust me. It's easier this way because once at the hardware store I accidentally used a US bolt on the metric hole and it got locked up in there. Had to flag down an employee and have him get it out using tools. Anyway, I think this gauge is pretty useful for the DIY crowd and the price is right for most of us. It's pretty bad when misleading reviews get upvotes. This one will probably get downvoted, but I hope it helps at least one person who kept scrolling down.

### ⭐⭐⭐⭐⭐ Perfect size
*by K***R on August 4, 2025*

This is a great product and perfect size.

## Frequently Bought Together

- Marine Bolt Supply Nut, Bolt & Screw Gauge (Standard & Metric) (Coarse & Fine) Diameter, Length & Thread Pitch (Green)
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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-03-15*