4 catalogued sizes, dimensioned to DIN 906 (taper thread) / DIN 908 (parallel thread with seal). Pick any row and the technical drawing redraws to it.
Hex Socket Pipe Plugs to DIN 906 (taper thread) / DIN 908 (parallel thread with seal): the full dimensional table is reproduced below. 4 sizes are held in the table below, and the technical drawing redraws to whichever row you select.
Standard
DIN 906 (taper thread) / DIN 908 (parallel thread with seal)
Catalogued sizes
4
Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.
Hex Socket Pipe Plugs — DIN 906 (taper thread) / DIN 908 (parallel thread with seal)
choosing DIN 906 where the thread itself must seal
fitting a bonded or USIT ring under a parallel-thread plug
matching the thread form before the thread size
using a socket plug where the head must sit flush
joining and sealing a fluid or air line
adapting between thread forms on a manifold
Service conditions to specify against
Marine and coastal
Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
Sealed joints
Used where the fixing has to keep water or air out as well as hold — the elastomer, not the fastener, decides service life.
Where to use something else
Do not fit a parallel-thread plug without its sealing washer; it tightens perfectly well and then weeps, and the plug gets blamed instead of the missing washer.
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Request a Quotation for Hex Socket Pipe Plugs
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (DIN 906 (taper thread) / DIN 908 (parallel thread with seal))
Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.
Standard
Thread form
Seals on
Needs a washer
DIN 906
taper (R / NPT)
the thread flanks
no
DIN 908
parallel (G / M)
the face under the head
yes u2014 bonded or USIT ring
DIN 910
parallel (G / M), hex head
the face under the head
yes u2014 bonded or USIT ring
DIN 7604
parallel (G / M), hex head, low profile
the face under the head
yes u2014 bonded or USIT ring
Hex Socket Pipe Plugs are pipe & pneumatic fittings manufactured to DIN 906 (taper thread) / DIN 908 (parallel thread with seal). This page lists the full dimensional range with the key specifications engineers need to select and specify them.
What Are Hex Socket Pipe Plugs?
Hex Socket Pipe Plugs are pipe & pneumatic fittings defined by DIN 906 (taper thread) / DIN 908 (parallel thread with seal). They are selected by pipe thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.
Materials & Finishes
Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.
Specification Guides
Each size, material and standard of Hex Socket Pipe Plugs has its own reference page with the figures for that one configuration.
Hex Socket Pipe Plugs are supplied to order. Pricing starts from approximately US$0.25 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.
Hex Socket Pipe Plugs — DIN 906 (taper thread) / DIN 908 (parallel thread with seal)
This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.
01
Cold heading
Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.
Head dimensions and under-head radius checked at set-up and per shift.
02
Thread rolling
Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.
Go / no-go ring gauges to ISO 965 tolerance class 6g.
03
Heat treatment
Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.
Core hardness and tensile tested per lot to ISO 898-1.
04
Surface treatment
Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.
Coating thickness and neutral salt spray hours to ISO 9227.
Frequently Asked Questions
What standard are Hex Socket Pipe Plugs manufactured to?
Hex Socket Pipe Plugs are manufactured to DIN 906 (taper thread) / DIN 908 (parallel thread with seal). The dimensional values on this page follow that standard.
Which sizes of Hex Socket Pipe Plugs does Engineering Hardware supply?
The table on this page lists 4 sizes for Hex Socket Pipe Plugs, ranging from DIN 906 to DIN 7604. Sizes outside the table can be quoted on request.
In which materials are Hex Socket Pipe Plugs supplied?
Hex Socket Pipe Plugs are supplied in brass, carbon steel and stainless, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Hex Socket Pipe Plugs.
How do I request a quotation?
Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.
Need a fastener quote or a spec sheet?Message our engineers on WhatsApp — send a drawing or DIN number and get pricing back fast.Start WhatsApp Chat →
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