---
title: Tools International - Locking M Mandrels
description: Specifications, Assembly, and Components for the M Series Lock Mandrels.
image: https://www.tools-int.com/hubfs/Locking%20C%20Mandrel-3.png
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# Locking "M" Lock Mandrel

#### Tools International Corp

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#### Description

#### Specifications

#### Assembly

#### Components

### Description

 

The “M” Series Lock Mandrels are selective type locks that are designed to locate in the “W” Series Landing Nipples. The “M” Lock, run with the series “W” Running Tool, features the ability to land in any “W” nipple of the same seal bore in the tubing string. The “M” Series Lock Mandrel uses a shear release ratchet mechanism that prevents the lock dogs from retracting while set in the nipple.

![m_lock](https://www.tools-int.com/hs-fs/hubfs/m_lock.jpg?width=220&name=m_lock.jpg)

 

###          Specifications

 

| SPECIFICATIONS |  |  |
| --- | --- | --- |
|  | **2"** | ** 2 1/2"** |
| FISHNECK O.D. | 1.375" | 1.750" |
| PACKING O.D. | 1.875" | 1.750" |
| MINIMUM I.D. | 7/8" | 1.125" |
| RUNNING TOOL | 41W10200 | 41W10250 |
| PULLING TOOLS | 40JDC200 | 40JDC250 |

###          Assembly

 

| ASSEMBLY |  |  |
| --- | --- | --- |
|  | **2"** | **2 1/2"** |
| Part Number | 12M00200 | 12M00250 |

###          Components

 

| COMPONENTS |  |  |
| --- | --- | --- |
|  | **2"** | **2 1/2"** |
| Fishneck | 12B01182 | 12B01187 |
| Lock House | 12B01181 | 12B01199 |
| Locking Dog | (2) 12B01178 | (3) 12B01198 |
| Packing Body | 12B01200 | 12B01201 |
| Expander Tube | 12B01183 | 12B01189 |
| Back Up Ring | (2) 12B01204 | (2) 12B01208 |
| Vee Packing | (6) 91V31000 | (6) 91V31800 |
| Adapter Ring | 12B01203 | 12B01207 |
| Ratchet Assembly | 12CL1200 | 12CL1250 |

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