Brass Moulding Inserts · DIN 16903 · Jamnagar, India

DIN 16903 Form C

Hexagonal body, with shoulder — brass mould-in threaded insert, knurled, CW614N, M2–M12.

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The DIN 16903 Form C is a brass mould-in threaded insert with a hexagonal body, with shoulder, knurled on its outside so that when it is placed in the injection mould and plastic is moulded around it, it locks into the plastic part and gives a durable metric thread; the plain bore provides a standard internal metric thread; the hexagonal body resists rotation under tightening torque; and the shoulder sets seating depth with a flush bearing face. Brassland machines it from free-cutting brass CW614N (CuZn39Pb3) — or lead-free CW724R — to DIN 16903, as part of our moulding-insert programme.

DIN 16903 Form C brass moulding insert (hexagonal body, with shoulder) — engineering drawing

DIN 16903 Form C — dimensioned drawing (Brassland).

Specification

Standard	DIN 16903
Form	Form C — hexagonal body, with shoulder
Installation	Mould-in / insert moulding (over-moulded)
Thread	M2–M12 (internal 6H)
Material	CW614N (CuZn39Pb3); lead-free CW724R, steel/stainless on request
Retention	External knurling against rotation and pull-out
Order example	Threaded insert DIN 16903 brass C-M4

Datasheet — dimensions to DIN 16903

Thread d1	Body Ø d3	Installed Ø d6	Length l2	A/F s
M2	3.2	3.5	3.5	–
M2.5	3.4	3.8	4	–
M3	3.8	4.2	4.5	5
M3.5	4.5	5	5.5	5.5
M4	5	5.5	6	6
M5	6.4	7	7.5	7
M6	7.4	8	9	9
M8	10.4	10	12	11
M10	13	12.5	15	14
M12	17	16	18	19

Dimensions in mm to DIN 16903; tolerances d3 h12, d6 h11, coaxiality per DIN ISO 1101. Further dimensions (d2, d4, l, r, t, e) and intermediate sizes to drawing. d5 = stock diameter before knurling.

Applications

DIN 16903 mould-in inserts give a strong, reusable metal thread in a plastic part. Typical applications include injection-moulded housings and enclosures, automotive interior and under-hood plastics, electrical and electronics housings, EV connector and battery-pack plastics, telecom and instrumentation cases, and appliance and power-tool bodies. All parts are made to order to your drawing.

Product

Moulding Inserts — DIN 16903

All 14 forms A–U.

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Threaded Inserts Guide

Types & selection.

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CW614N (CuZn39Pb3)

Standard insert brass.

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CW724R Lead-Free

RoHS / potable option.

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Electronics & PCB

Inserts in plastic housings.

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Automotive

Inserts in moulded plastics.

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Insert Installation Guide

Mould-in vs heat-set.

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Insert Range

Full insert catalogue.

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How it works

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Frequently asked questions

How is a DIN 16903 Form C insert installed?

It is a mould-in insert: it is loaded into the injection tool and the plastic is moulded around it, embedding the thread as the part is formed (not pressed or heat-set in afterwards).

What makes Form C different from the other DIN 16903 forms?

All 14 forms share the same mould-in principle and differ in body shape, shoulder and bore. Form C is a hexagonal body, with shoulder. See the full A–U comparison on the moulding-inserts hub.

What material and thread sizes are available?

Standard brass is CW614N (CuZn39Pb3); lead-free CW724R is available for potable-water and RoHS/REACH-sensitive parts. Metric threads M2–M12; intermediate sizes to drawing.

Which knurling can be specified?

Diamond (cross), straight or unidirectional knurling can be specified to tune pull-out and torque resistance for your resin and load case.

← All DIN 16903 forms