R 3/8 Pipe Plug, DIN 906

The R 3/8 pipe plug (DIN 906) closes a tapered R 3/8 port with a 8 mm hex key: 10 mm long, the socket at least 5 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 3/8 pipe plug
• Model id: din906-r3-8
• Standard: DIN 906:2020-02 · R 3/8, 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-r3-8	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
L	Length		10		10	nominal	L1
s	Socket width across flats	8.025	8	8.175	8.1	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)		16.662		16.662	nominal	L2
d2	Pitch diameter		15.806		15.806	nominal	L2
d1	Minor diameter		14.95		14.95	nominal	L2
a	Gauge length		6.4		6.4	nominal	L1
alpha	Flank angle		55		55	nominal	L1
taper	Taper		16		16	nominal	L1

Drawing

As a PDF: CC-DIN906-SZ-3-8.pdf.

The R 3/8 pipe plug beside the R 1/4 and the R 1/2

The R 3/8 is number 3 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 3/8 pipe plug, the same on the R 1/4 and the R 1/2.
• Socket width across flats (s): 8 mm on the R 3/8 pipe plug, against 7 mm on the R 1/4 and 10 mm on the R 1/2.
• Socket depth (t1): at least 5 mm on the R 3/8 pipe plug, the same on the R 1/4 and the R 1/2.
• Threads per inch (n): 19 mm on the R 3/8 pipe plug, against 19 mm on the R 1/4 and 14 mm on the R 1/2.
• Pitch (P): 1.337 mm on the R 3/8 pipe plug, against 1.337 mm on the R 1/4 and 1.814 mm on the R 1/2.
• Thread height (h): 0.856 mm on the R 3/8 pipe plug, against 0.856 mm on the R 1/4 and 1.162 mm on the R 1/2.
• Major diameter (gauge diameter) (d): 16.662 mm on the R 3/8 pipe plug, against 13.157 mm on the R 1/4 and 20.955 mm on the R 1/2.
• Pitch diameter (d2): 15.806 mm on the R 3/8 pipe plug, against 12.301 mm on the R 1/4 and 19.793 mm on the R 1/2.

Other sizes

• One size smaller: R 1/4 Pipe Plug, DIN 906, 7 mm hex key, length 10 mm.
• One size larger: R 1/2 Pipe Plug, DIN 906, 10 mm hex key, length 10 mm.

Documents

• CC-DIN906-DS-R3-8.pdf: 3/8 datasheet: values with levels, sources
• CC-DIN906-SZ-3-8.pdf: 3/8 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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