R 1/8 Pipe Plug, DIN 906

The R 1/8 pipe plug (DIN 906) closes a tapered R 1/8 port with a 5 mm hex key: 8 mm long, the socket at least 4 mm deep. Available as simplified and threaded STEP files.

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

• Also searched as: R 1/8 pipe plug
• Model id: din906-r1-8
• Standard: DIN 906:2020-02 · R 1/8, pitch 0.907 mm, R taper pipe thread (ISO 7-1), 55 degree profile, 1:16 taper, right hand

Files

Part key	Simplified	Threaded
din906-r1-8	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
L	Length		8		8	nominal	L1
s	Socket width across flats	5.02	5	5.14	5.08	midpoint of min–max	L0 (min, max: one source)
t1	Socket depth	4			4	single limit (min), modeled at the limit	L1
n	Threads per inch		28		28	nominal	L2
P	Pitch		0.907		0.907	nominal	L2
h	Thread height		0.581		0.581	nominal	L2
d	Major diameter (gauge diameter)		9.728		9.728	nominal	L2
d2	Pitch diameter		9.147		9.147	nominal	L2
d1	Minor diameter		8.566		8.566	nominal	L2
a	Gauge length		4		4	nominal	L1
alpha	Flank angle		55		55	nominal	L1
taper	Taper		16		16	nominal	L1

Drawing

As a PDF: CC-DIN906-SZ-1-8.pdf.

The R 1/8 pipe plug beside the R 1/4

The R 1/8 is the first of the 8 DIN 906 pipe plugs published here, listed from R 1/8 to R 1-1/2.

• Length (L): 8 mm on the R 1/8 pipe plug, against 10 mm on the R 1/4.
• Socket width across flats (s): 5 mm on the R 1/8 pipe plug, against 7 mm on the R 1/4.
• Socket depth (t1): at least 4 mm on the R 1/8 pipe plug, against at least 5 mm on the R 1/4.
• Threads per inch (n): 28 mm on the R 1/8 pipe plug, against 19 mm on the R 1/4.
• Pitch (P): 0.907 mm on the R 1/8 pipe plug, against 1.337 mm on the R 1/4.
• Thread height (h): 0.581 mm on the R 1/8 pipe plug, against 0.856 mm on the R 1/4.
• Major diameter (gauge diameter) (d): 9.728 mm on the R 1/8 pipe plug, against 13.157 mm on the R 1/4.
• Pitch diameter (d2): 9.147 mm on the R 1/8 pipe plug, against 12.301 mm on the R 1/4.

Other sizes

• One size larger: R 1/4 Pipe Plug, DIN 906, 7 mm hex key, length 10 mm.

Documents

• CC-DIN906-DS-R1-8.pdf: 1/8 datasheet: values with levels, sources
• CC-DIN906-SZ-1-8.pdf: 1/8 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

etb-iso7-1, fasten-it-din906, gewinde-normen-bspt, iso228-1-2000-sample, torqbolt-din906, wikipedia-bsp. Full citations: the method page and this size's datasheet.

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