M8x12.7 Heat-set Insert (Threaded Insert For Printed Parts), Heat-set threaded insert

The M8x12.7 heat-set insert (Heat-set threaded insert): length 12.7 mm, knurl outside diameter 10.1 mm, pilot diameter 9.5 mm. Available as simplified and threaded STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: M8x12.7 insert
• Model id: heat-set-inserts-m8x12-7
• Standard: Heat-set threaded insert · size M8x12.7

Files

Part key	Simplified	Threaded
heat-set-inserts-m8x12-7	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
L	Length		12.7		12.7	nominal	L1
d1	Knurl outside diameter		10.1		10.1	nominal	L0 (nom: one source)
d2	Pilot diameter		9.5		9.5	nominal	L0 (nom: one source)

Drawing

As a PDF: CC-HSINSERT-SZ-M8x12.7.pdf.

What each maker states

• Recommended hole, per maker: CNC Kitchen 9.7 mm, ruthex 9.6 mm.
• Wall around the hole, per maker: CNC Kitchen 4.5 mm, ruthex 4.5 mm.
• Minimum hole depth, per maker: CNC Kitchen 13.7 mm, ruthex 13.7 mm.
• Knurl diameter d1: ruthex states 10.1 mm, CNC Kitchen 10.2 mm; the model is ruthex's, and the difference isn't a claim that either table is wrong.
• The hole depth is each maker's callout on its drawing added to that maker's L, read twice by Claude, and the two reads agree.
• CNC Kitchen's values for this size are figure reads: its table is an image, read twice by Claude, and the two reads agree.

The M8x12.7 heat-set insert beside the M6x12.7

The M8x12.7 is the largest of the 15 Heat-set threaded insert heat-set inserts published here, from M2x3 to M8x12.7.

• Length (L): 12.7 mm on the M8x12.7 heat-set insert, the same on the M6x12.7.
• Knurl outside diameter (d1): 10.1 mm on the M8x12.7 heat-set insert, against 8.7 mm on the M6x12.7.
• Pilot diameter (d2): 9.5 mm on the M8x12.7 heat-set insert, against 7.9 mm on the M6x12.7.

Other sizes

• One size smaller: M6x12.7 Heat-set Insert (Threaded Insert For Printed Parts), Heat-set threaded insert.

Documents

• CC-HSINSERT-DS-M8x12.7.pdf: M8x12.7 datasheet: values with levels, sources
• CC-HSINSERT-SZ-M8x12.7.pdf: M8x12.7 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

cnckitchen-inserts, ruthex-inserts. Full citations: the method page and this size's datasheet.

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