Brass Moulding Inserts · DIN 16903 · Jamnagar, India

DIN 16903 Form F

Round body, without shoulder, with closed floor (blind) — brass mould-in threaded insert, knurled, CW614N, M2–M12.

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The DIN 16903 Form F is a brass mould-in threaded insert with a round body, without shoulder, with closed floor (blind), 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 closed floor seals the thread from plastic flow and from media in service; the round body suits lighter loads and tighter spacing. 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 F brass moulding insert (round body, without shoulder, with closed floor (blind)) — engineering drawing

DIN 16903 Form F — dimensioned drawing (Brassland).

Specification

Standard	DIN 16903
Form	Form F — round body, without shoulder, with closed floor (blind)
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 F-M4

Form F at a glance

DIN 16903 Form F is the round-body, without shoulder, closed-floor (blind) member of the DIN 16903 mould-in insert family, listed in 10 metric sizes from M2 to M12. Within the family, the open-ended version is Form B; its hexagonal-body counterpart is Form E; the same body with a shoulder is Form H; the through-hole version is Form Q.

Datasheet — dimensions to DIN 16903

Thread d1	Body Ø d3	Installed Ø d6	Through-hole Ø d7	Length l1
M2	3.2	3.5	–	2.3
M2.5	3.4	3.8	–	2.6
M3	3.8	4.2	4.2	3
M3.5	4.5	5	5.5	3.5
M4	5	5.5	6	4
M5	6.4	7	7	5
M6	7.4	8	9	6
M8	10.4	10	11	8
M10	13	12.5	14	10
M12	17	16	19	11

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

Form F is specified wherever an injection-moulded plastic part needs a strong, reusable metal thread with the closed-floor geometry shown above — typical sectors and resin guidance are on the DIN 16903 hub.

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.

View →Guide

Insert Installation Guide

Mould-in vs heat-set.

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Insert Range

Full insert catalogue.

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How it works

Send a drawing or sample.
Quote in 24 hours.

To order Form F, give the thread size, knurl type and quantity — material, knurling, MOQ and documentation are covered on the DIN 16903 moulding-inserts hub.

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Other DIN 16903 forms

DIN 16903 Form A · DIN 16903 Form B · DIN 16903 Form C · DIN 16903 Form D · DIN 16903 Form E · DIN 16903 Form G · DIN 16903 Form H · DIN 16903 Form P · DIN 16903 Form Q · DIN 16903 Form R · DIN 16903 Form S · DIN 16903 Form T · DIN 16903 Form U · the DIN 16903 hub.

Frequently asked questions

How is a DIN 16903 Form F 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 F 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 F is a round body, without shoulder, with closed floor (blind). See the full A–U comparison on the moulding-inserts hub.

← All DIN 16903 forms