Installation Instructions for Hilti S-MD 51S Self-Drilling Screw

Installation guide for Hilti S-MD 51S 5.5x32 stainless steel self-drilling screws. Includes drilling capacity, compatible tools, and correct installation steps.

Table of contents

Quick guide from the manual

This document provides installation guidelines for the Hilti S-MD 51S self-drilling screw. Ensure you are using the correct tool and speed settings to prevent damage to the fastener or the material. Always maintain a perpendicular angle during installation and avoid overtightening.

Product specifications

Model: S-MD 51S (Item #375230)
Diameter: 5.5 mm
Head size: 8 mm (Hex)
Drilling capacity (DC): 1.2 mm to 3 mm
Max material thickness (MFmax): 15 mm
Material: Stainless A2 (Inox)

Compatible tools and settings

For optimal installation, use the following Hilti tools:

ST 1800
ST 1800-A
ST-2000
SF (H)

Recommended speed: 1200-2000 rpm.

Installation steps

Preparation: Ensure the tool is set to the recommended speed range of 1200-2000 rpm.
Tooling: Use the S-NS 8 socket/bit for installation.
Alignment: Position the screw perpendicular to the surface.
Driving: Drive the screw into the material.
Finishing: Stop driving immediately once the washer is seated flat against the surface. Do not overtighten, as this can damage the washer or the seal.

Manufacturer information

Hilti Corporation

Brand profile

Manufacturer website https://www.hilti.com Support https://www.hilti.com/content/hilti/global/en/support.html Manufacturer manuals https://www.hilti.com/content/hilti/global/en/technical-literature.html

Practical help

Common problems

Screw not seating correctly

Ensure the screw is driven perpendicular to the surface. Check that the tool speed is within the 1200-2000 rpm range.

Washer damaged or crushed

Do not overtighten. Stop driving the screw as soon as the washer makes full contact with the surface.

Before use

Verify the material thickness is between 1.2 mm and 3 mm.
Ensure the installation tool is compatible (ST 1800, ST 1800-A, ST-2000, or SF (H)).
Set the tool speed to 1200-2000 rpm.
Use the S-NS 8 socket/bit.

Manual page author

Emily Carter

User documentation editor

Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.