Threaded Inserts · Heat-Set & Molded-In Inserts

Heat-Set Threaded Inserts for Plastic Trade series (heat-set insert) (EH-INS-HST)

7 catalogued sizes, dimensioned to Trade series (heat-set insert). Pick any row and the technical drawing redraws to it.

Heat-Set Threaded Inserts for Plastic to Trade series (heat-set insert) are catalogued in sizes M2 to M6, with od 3.2-8.2 mm, long 3-9.5 mm. 7 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard: Trade series (heat-set insert)
Size range: M2-M6
OD: 3.2-8.2 mm
Long: 3-9.5 mm
Catalogued sizes: 7

Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.

Applications & Industries

The sectors that buy Heat-Set Threaded Inserts for Plastic, and the duty each one buys them for. Stocked from M2 to M6.

Industries that specify Heat-Set Threaded Inserts for Plastic

Consumer electronics Housings assembled and re-opened for service.
Injection moulding Post-moulded threads in bosses.
Prototyping & product development Real threads in a printed prototype.
Additive manufacturing Threads in printed parts, where layer adhesion will not hold a screw.
Plastics & moulded parts Durable metal threads in housings that would strip if screwed into directly.
Aluminium & castings Reinforced threads in soft alloy, and repair of stripped holes.

Heat-Set Threaded Inserts for Plastic in use — application photograph

Typical applications

installed with a heated tip so the plastic flows into the knurl
boss hole size is the critical dimension, not the insert length
a reusable metal thread in a plastic or printed boss
repairing a stripped hole to its original size
assemblies opened and closed many times over their life
creating a reusable metal thread in a soft or thin parent

Service conditions to specify against

Marine and coastal: Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
Parent material first: The insert type is chosen by what it goes into — moulded plastic, printed polymer, alloy casting or timber — not by the screw that goes into it.

Full application guide: where Heat-Set Threaded Inserts for Plastic are used, how to specify them, and the cases they are wrong for

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quotation for Heat-Set Threaded Inserts for Plastic Trade series (heat-set insert) (EH-INS-HST)

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

Request a Quotation

Specification

Item / category Standard Size(s) Material / finish Quantity

Business Information

Company * Contact Name * Email * Phone (with country code) Country / Region

Notes

Dimensions & Specifications (Trade series (heat-set insert))

Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.

Thread size	Outer diameter (mm)	Length L (mm)	Hole in parent (mm)	Recommended boss OD (mm)	Knurl bands	Material	Installation
M2	3.2	3.0	3.0	6.4	2	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C
M2.5	3.6	4.0	3.4	7.2	2	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C
M3	4.6	4.0	4.4	9.2	3	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C
M3	4.6	5.7	4.4	9.2	3	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C
M4	5.6	5.7	5.4	11.2	3	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C
M5	6.9	5.8	6.7	13.8	3	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C
M6	8.2	9.5	8.0	16.4	3	Brass CuZn39Pb3	Heated tip, 200-250 u00b0C

Manufactured to Trade series (heat-set insert), Heat-Set Threaded Inserts for Plastic are threaded inserts supplied by Engineering Hardware. The dimensional data, materials and selection notes are summarized here.

What Are Heat-Set Threaded Inserts for Plastic?

Heat-Set Threaded Inserts for Plastic are threaded inserts defined by Trade series (heat-set insert). They are selected by thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.

Materials & Finishes

Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.

Pricing

Heat-Set Threaded Inserts for Plastic are supplied to order. Pricing starts from approximately US$0.060 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.

Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

01

Cold heading

Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

Head dimensions and under-head radius checked at set-up and per shift.
02

Thread rolling

Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

Go / no-go ring gauges to ISO 965 tolerance class 6g.
03

Heat treatment

Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

Core hardness and tensile tested per lot to ISO 898-1.
04

Surface treatment

Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

Which standard governs Heat-Set Threaded Inserts for Plastic?

Heat-Set Threaded Inserts for Plastic are manufactured to Trade series (heat-set insert). The dimensional values on this page follow that standard.

What sizes are available for Heat-Set Threaded Inserts for Plastic?

The table on this page lists 7 sizes for Heat-Set Threaded Inserts for Plastic, ranging from M2 to M6. Sizes outside the table can be quoted on request.

In which materials are Heat-Set Threaded Inserts for Plastic supplied?

Heat-Set Threaded Inserts for Plastic are supplied in stainless and phosphor bronze, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Heat-Set Threaded Inserts for Plastic.

How do I request a quotation?

Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.