---
product_id: 20734489
title: "Big-SERT M14x1.25x16.8mm TAPERSEAT Insert Qty 2# 51457"
brand: "time-sert"
price: "€ 80.32"
currency: EUR
in_stock: true
url: https://www.desertcart.sk/products/20734489-big-sert-m14x1-25x16-8mm-taperseat-insert-qty-2-51457
store_origin: SK
region: Slovakia
---

# M14x1.25 precision thread Truck-grade heavy-duty repair 16.8mm taper seat depth Big-SERT M14x1.25x16.8mm TAPERSEAT Insert Qty 2# 51457

**Brand:** time-sert
**Price:** € 80.32
**Availability:** ✅ In Stock

## Summary

> 🔧 Fix it right, fix it once — the pro’s oversized spark plug insert!

## Quick Answers

- **What is this?** Big-SERT M14x1.25x16.8mm TAPERSEAT Insert Qty 2# 51457 by time-sert
- **How much does it cost?** € 80.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/20734489-big-sert-m14x1-25x16-8mm-taperseat-insert-qty-2-51457)

## Best For

- time-sert enthusiasts

## Why This Product

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

## Key Features

- • **Precision Fit:** M14x1.25 thread ensures seamless, professional-grade installation.
- • **Heavy-Duty Material:** Zinc-coated copper core insert built to withstand truck-level stress and heat.
- • **Tapered Seat Design:** 16.8mm taper seat guarantees optimal spark plug alignment and sealing.
- • **Oversized Durability:** Engineered for coil thread failure recovery—no more compromises.
- • **Complete Repair Solution:** Requires Time-Sert kit (5141S or 5141E) for flawless, long-lasting results.

## Overview

The Big-SERT M14x1.25x16.8mm Taper Seat Insert by Time-Sert is a premium oversized spark plug repair solution designed for heavy-duty truck applications. Featuring a zinc-coated copper core and precision M14x1.25 threading, it restores damaged coil threads with a durable 16.8mm taper seat insert. Sold in pairs, it requires the Time-Sert installation kit (5141S or 5141E) to ensure a professional, long-lasting repair.

## Description

Big-SERT M14x1.25x16.8mm TAPERSEAT Insert Qty 2# 51457

## Features

- BIG-SERT OVERSIZED REPAIR for use when a coil style has failed
- M14x1.25x16.8mm Taper seat spark plug insert
- Must have kit p/n 5141S or 5141E to install. see description below
- Solid bushing oversized spark plug insert
- Professional repair insert for a high quality repair

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | TIME-SERT |
| Core Material | Copper |
| Gap Size | 1.25 Millimeters |
| Thread Size | 14 |
| Vehicle Service Type | Truck |
| UPC | 845617006539 |
| Manufacturer | Time-Sert® |
| Part Number | 51457 |
| Item Weight | 4.2 ounces |
| Product Dimensions | 1.5 x 1.5 x 1.5 inches |
| Item model number | 51457 |
| Is Discontinued By Manufacturer | No |
| Material | Zinc Coated |
| Item Package Quantity | 2 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** TIME-SERT
- **Core Material:** Copper
- **Gap Size:** 1.25 Millimeters
- **Thread Size:** 14
- **Vehicle Service Type:** Truck

## Images

![Big-SERT M14x1.25x16.8mm TAPERSEAT Insert Qty 2# 51457 - Image 1](https://m.media-amazon.com/images/I/515e-kZ8EwL.jpg)

## Frequently Bought Together

- Big-SERT M14x1.25x16.8mm TAPERSEAT Insert Qty 2# 51457
- BIG-SERT M14x1.25x16.8mm INSERT QTY 2# 51407

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**Shop now:** [https://www.desertcart.sk/products/20734489-big-sert-m14x1-25x16-8mm-taperseat-insert-qty-2-51457](https://www.desertcart.sk/products/20734489-big-sert-m14x1-25x16-8mm-taperseat-insert-qty-2-51457)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-10*