R 1/4 Pipe Plug, DIN 906

A 10 mm long R 1/4 pipe plug (DIN 906) that sits flush in a tapered port, turned with a 7 mm hex key in a socket at least 5 mm deep. It comes in simplified and threaded STEP files.

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

• Also searched as: R 1/4 pipe plug
• Model id: din906-r1-4
• Standard: DIN 906:2020-02 · R 1/4, pitch 1.337 mm, R taper pipe thread (ISO 7-1), 55 degree profile, 1:16 taper, right hand

Files

Part key	Simplified	Threaded
din906-r1-4	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
L	Length		10		10	nominal	L1
s	Socket width across flats	7.025	7	7.175	7.1	midpoint of min–max	L0 (min, max: one source)
t1	Socket depth	5			5	single limit (min), modeled at the limit	L1
n	Threads per inch		19		19	nominal	L2
P	Pitch		1.337		1.337	nominal	L2
h	Thread height		0.856		0.856	nominal	L2
d	Major diameter (gauge diameter)		13.157		13.157	nominal	L2
d2	Pitch diameter		12.301		12.301	nominal	L2
d1	Minor diameter		11.445		11.445	nominal	L2
a	Gauge length		6		6	nominal	L1
alpha	Flank angle		55		55	nominal	L1
taper	Taper		16		16	nominal	L1

Drawing

As a PDF: CC-DIN906-SZ-1-4.pdf.

The R 1/4 pipe plug beside the R 1/8 and the R 3/8

The R 1/4 is number 2 of the 8 DIN 906 pipe plugs published here, listed from R 1/8 to R 1-1/2.

• Length (L): 10 mm on the R 1/4 pipe plug, against 8 mm on the R 1/8 and 10 mm on the R 3/8.
• Socket width across flats (s): 7 mm on the R 1/4 pipe plug, against 5 mm on the R 1/8 and 8 mm on the R 3/8.
• Socket depth (t1): at least 5 mm on the R 1/4 pipe plug, against at least 4 mm on the R 1/8 and at least 5 mm on the R 3/8.
• Threads per inch (n): 19 mm on the R 1/4 pipe plug, against 28 mm on the R 1/8 and 19 mm on the R 3/8.
• Pitch (P): 1.337 mm on the R 1/4 pipe plug, against 0.907 mm on the R 1/8 and 1.337 mm on the R 3/8.
• Thread height (h): 0.856 mm on the R 1/4 pipe plug, against 0.581 mm on the R 1/8 and 0.856 mm on the R 3/8.
• Major diameter (gauge diameter) (d): 13.157 mm on the R 1/4 pipe plug, against 9.728 mm on the R 1/8 and 16.662 mm on the R 3/8.
• Pitch diameter (d2): 12.301 mm on the R 1/4 pipe plug, against 9.147 mm on the R 1/8 and 15.806 mm on the R 3/8.

Other sizes

• One size smaller: R 1/8 Pipe Plug, DIN 906, 5 mm hex key, length 8 mm.
• One size larger: R 3/8 Pipe Plug, DIN 906, 8 mm hex key, length 10 mm.

Documents

• CC-DIN906-DS-R1-4.pdf: 1/4 datasheet: values with levels, sources
• CC-DIN906-SZ-1-4.pdf: 1/4 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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