---
product_id: 240379498
title: "Lyman 3121040#12 Slot Blank Tool"
brand: "lyman"
price: "€ 3.41"
currency: EUR
in_stock: false
url: https://www.desertcart.fi/products/240379498-lyman-3121040-12-slot-blank-tool
store_origin: FI
region: Finland
---

# Made in China 3/8" Slot Size Lightweight at 14g Lyman 3121040#12 Slot Blank Tool

**Brand:** lyman
**Price:** € 3.41
**Availability:** ❌ Out of Stock

## Summary

> 🔩 Elevate Your Gear with Precision!

## Quick Answers

- **What is this?** Lyman 3121040#12 Slot Blank Tool by lyman
- **How much does it cost?** € 3.41 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/240379498-lyman-3121040-12-slot-blank-tool)

## Best For

- lyman enthusiasts

## Why This Product

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

## Key Features

- • **Universal Fit:** Perfect for any unisex application, ensuring versatility.
- • **Quality Assurance:** Manufactured by Lyman, a trusted name in the industry.
- • **Compact Dimensions:** Measuring just 2.54 x 0.64 x 2.54 cm for easy handling.
- • **Customizable Design:** Easily reshaped and refinished to match your style.
- • **Seamless Dovetail Integration:** Effortlessly fills sight slots for a polished look.

## Overview

The Lyman 3121040#12 Slot Blank Tool is a versatile 3/8 inch slot blank designed to seamlessly fill dovetail slots after sight removal. Weighing only 14g and measuring 2.54 x 0.64 x 2.54 cm, this customizable tool can be reshaped and refinished to achieve your desired aesthetic. Proudly made in China, it’s the perfect addition for any unisex application, ensuring both functionality and style.

## Description

This sight Slot blank is perfect for filling a dovetail after a sight has been moved or replaced with a peep sight. Can be reshaped and refinished to achieve the desired look.

## Features

- This 3/8 Inch Slot Blank Fills The Dovetail When Sight Is Removed
- His Sight Slot Blank Is Perfect For Filling A Dovetail After A Sight Has Been Moved
- Can Be Reshaped And Refinished To Achieve The Desired Look
- Country Of Origin: China

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of items | 1 |
| Included components | #12 Slot Blank |
| Batteries included? | No |
| Brand | Lyman |
| Department | Unisex |
| Manufacturer | Pro-Motion Distributing - Direct |
| Item model number | 3121040 |
| Product Dimensions | 2.54 x 0.64 x 2.54 cm; 14 g |
| ASIN | B000LC28XO |

## Images

![Lyman 3121040#12 Slot Blank Tool - Image 1](https://m.media-amazon.com/images/I/41v3zP0ZwmL.jpg)

## Questions & Answers

**Q: What is this length x width x height of this blank?**
A: Length is .650 Width is .444 Height is .130 at the end.  The top is slightly rounded like in the picture which gives it a nice appearance. I chose the Lyman over the Marble's because I read the Lyman is finished nicer.

**Q: Will this fit the Winchester model 1886 (new rifle)?**
A: If it has a standard 3/8" dovetail slot, it should fit. Some filing might be required, but it is better to be snug than loose (easy to take metal off, but hard to put metal back). I installed one on a Marlin 1894 with no filing; it was tight, and took a heavy brass punch and hammer, but it's in there for good.

**Q: Will this work on the rear sight dovetail on a Ruger 10/22?**
A: Yes, it will work, but, generally,  most all slot blanks & also replacement rear sights require some fitting, usually in the form of some gentle filing on its bottom surface. Slot blanks should NOT be a slip fit, but should be able to be tapped firmly into place with a brass, or preferably, a hard nylon drift punch (to avoid marring or battering) and a hammer. It is always good practice to remove the action/barrel from the stock and clamp it firmly in a padded vice, before attempting to fit the slot blank.

**Q: Just  ordered a Skinner winged peep.  Will this fit a Marlin 1894? or should I get this from Skinner also?**
A: If it's like the 3/8" dovetail on a marlin 336 rear sight it will fit but needs at least 1/16" ground off to match the barrel profile.  Without that it just looks like something you put there that happen to fit the slot.  If that makes sense.

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**Shop now:** [https://www.desertcart.fi/products/240379498-lyman-3121040-12-slot-blank-tool](https://www.desertcart.fi/products/240379498-lyman-3121040-12-slot-blank-tool)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-14*