Metric Countersunk Blanking Plug

A metric plug with an internal hex head that sits flush in the port. For blanking metric ports where clearance is tight.

Brand: Ayrtec – mild steel body with a plated finish, manufactured to the standards listed below.

Watch: Why You Need JIC Plugs Caps & O Ring Kit When Doing Hydraulic Repairs

Thread Standards

• Metric Stud Male – metric straight thread with a captive soft seal. It seals on a bonded washer or O-ring under the stud shoulder, not on the thread.

How to Choose

• A plug is male and blocks a female port. A cap is female and covers a male end. Work out which one the open connection is before you order.
• Countersunk means the head takes an internal hex key and sits flush or below the port face. Handy where there is no room for a spanner, but you need the right allen key on the truck.
• Still seals on a soft washer or O-ring under the shoulder.

Technicians Advice

Metric countersunk plugs come in a lot of close thread sizes. Check the callout rather than trying two or three in the port, because a wrong start damages the thread you are trying to protect.

Where You’ll Find It

• Metric Stud Male – European valve blocks and manifolds using a metric port with a soft seal under the shoulder.

Cross-Reference

• Metric Stud Male – Metric straight thread with a bonded washer or O-ring. Confirm the port series against the block before ordering.

Parker, Gates, Aeroquip and Ryco all manufacture to these same standards under their own part numbering, so a fitting built to the standard above will mate with theirs.

Cross-references are given at series level as a guide to the standard, not as a part-for-part substitution. Always confirm the thread form, size and seal type against the port before ordering.

📐Dimensions & thread sizes – every size in this range

← Swipe the table sideways to see every measurement →

Part code	A	L	D	Material	Finish
MSM-CS-10	M10x1.0	15mm	14mm	Mild steel	Plated finish
MSM-CS-12	M12x1.5	17mm	17mm	Mild steel	Plated finish
MSM-CS-14	M14x1.5	17mm	19mm	Mild steel	Plated finish
MSM-CS-16	M16x1.5	17mm	22mm	Mild steel	Plated finish
MSM-CS-18	M18x1.5	17mm	24mm	Mild steel	Plated finish
MSM-CS-20	M20x1.5	19mm	26mm	Mild steel	Plated finish
MSM-CS-22	M22x1.5	19mm	27mm	Mild steel	Plated finish
MSM-CS-24	M24x1.5	19mm	29mm	Mild steel	Plated finish
MSM-CS-27	M27x2	21mm	32mm	Mild steel	Plated finish
MSM-CS-33	M33x2	22mm	40mm	Mild steel	Plated finish
MSM-CS-42	M42x2	22mm	40mm	Mild steel	Plated finish

Key: L overall length, D outside diameter. Measurements in millimetres unless shown otherwise. Thread columns show what each end mates with. Dimensions are nominal – check critical clearances against the part.

Downloads

📄 Thread Identification Chart (PDF)

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