Slotted Pan Head Tapping Screw DIN 7971 Steel Fastener for Sheet Metal Panels and General Assembly

DIN 7971 Slotted Pan Head Tapping Screws combine a pan head with a single straight slot for installation using a flat-blade screwdriver. The head remains above the mounting surface, while the tapping thread forms a mating thread in a suitably prepared hole.

This screw form can be selected for sheet metal panels, covers, brackets and general assemblies designed for tapping screws. The rounded head provides an accessible drive and a bearing surface above the component.

The DIN 7971:1990 reference includes steel screws in sizes from ST2.2 to ST6.3. Select the screw diameter, length and thread-end type together with the component material, thickness and hole preparation requirements.

Product Specifications

The specifications above describe the standard reference. Availability is confirmed for the requested size, length, thread-end type and surface treatment combination.

Pan Head for Surface-Mounted Assembly

The pan head has a rounded upper profile and seats above the mounting surface. It is suitable for assemblies designed to accommodate a projecting screw head.

Head diameter and head height are important when checking clearance around covers, adjacent components and installation tools. The component should provide a suitable seating surface for the head.

For replacement orders, compare the head dimensions as well as the thread size. A countersunk screw requires a different seating arrangement and should not be substituted solely because the thread diameter is similar.

Straight Slot Drive

The single straight slot accepts a flat-blade screwdriver. The blade should fit the slot and remain aligned with the screw during installation and removal.

Driver access is particularly important near panel edges, inside housings and around adjacent components. Include any access restrictions in the assembly drawing when selecting the screw.

A suitable blade and controlled installation help reduce damage to the slot and the mating component.

Tapping Thread and Hole Preparation

DIN 7971 uses a tapping screw thread rather than a metric machine thread. The ST designation identifies the tapping screw size.

The screw requires a hole prepared for the component material and thickness. Hole diameter, thread engagement and installation conditions affect assembly performance, so they should be selected for the actual connection.

DIN 7971 is a tapping screw, not a self-drilling screw. It does not have the drill-point geometry used to drill its own installation hole.

Type C and Type F Thread Ends

The DIN 7971 reference includes two thread-end forms:

Specify the required type in the inquiry or drawing. The thread-end form affects the screw tip geometry and the clearance required at the back of the assembly.

For replacement parts, identify the existing end form instead of selecting only by head appearance and nominal diameter.

Material and Surface Treatment

The DIN 7971:1990 reference specifies steel, with material and mechanical requirements according to DIN 267-12.

The surface treatment references include a plain condition and electroplating according to DIN 267-9. Other treatments can be defined by agreement for the order.

State the required coating or finish with the inquiry. Where coating thickness, appearance or corrosion testing is controlled by a project specification, include the applicable requirements rather than relying on a general finish description.

Applications

DIN 7971 slotted pan head tapping screws can be considered for:

・Sheet metal panels and removable covers.

・Ventilation equipment and associated brackets.

・Equipment housings designed for tapping screws.

・Hardware and light mechanical assemblies with prepared holes.

・Replacement fastening against an existing specification or drawing.

The suitability of the connection depends on the component material, thickness, hole preparation and required engagement. These details should be considered together with the screw size and length.

Related Standards

Related references include ISO 1481, DIN EN ISO 1481 and GB/T 5282.

Related standards may have dimensional or technical differences. State the controlling standard and edition in the purchase specification, especially for replacement parts or assemblies with restricted head clearance.

Information Needed for a Quotation

Please provide:

・Standard reference and required edition.

・ST thread size and nominal screw length.

・Type C or Type F thread end.

・Required material and mechanical requirements.

・Surface treatment or coating specification.

・Quantity for each size.

・Component material and thickness, where relevant.

・Drawing, inspection and packaging requirements.

・Delivery destination.

FAQ

1.What is a DIN 7971 screw?

DIN 7971 is a slotted pan head tapping screw. It combines a rounded pan head, a straight slot drive and a tapping screw thread.

2.What sizes are included in the standard reference?

The reference lists ST2.2, ST2.9, ST3.5, ST3.9, ST4.2, ST4.8, ST5.5 and ST6.3. ST3.9 is identified as a non-preferred size.

3.Is DIN 7971 a self-drilling screw?

No. It is a tapping screw for a suitably prepared hole. It does not have a drill point.

4.What is the difference between Type C and Type F?

Type C has a pointed end, while Type F has a flat end. Specify the required form when requesting a quotation.

5.Does the nominal screw length include the head?

No. Nominal length is measured from the bearing surface beneath the head to the screw tip.

6.Which material is used in this reference?

The DIN 7971:1990 reference specifies steel, with mechanical properties and material requirements according to DIN 267-12.

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Looking for DIN 7971 Slotted Pan Head Tapping Screws? Send your required ST size, nominal length, Type C or Type F end, surface treatment and quantity to JJ Fastener Factory. Include the drawing and assembly requirements so the quotation can follow your specification.