Stainless Steel Adapter, 3/8-18 Male NPT Countersunk Hex Plug

Alternate Part Numbers Alternate Part Number 3/8CP, Alternate Part Number C1FC36, Alternate Part Number MI-08748561, Alternate Part Number MINO-00766X96557	B 0.41	Brand Ssp Fittings Corp	Brand SSP Fittings Corp	Pack Size 1.00	UOM EA	Hex 0.31	Supplier Part Number 3/8CP	Thread 1 3/8-18	Thread Sealant No	Product Weight 0.03 lbs

Product Questions & Answers

Will this plug hold up to some serious corrosion, or am I gonna be replacing it every few months?

Question by: Norm S on Sep 1, 2025, 3:11 PM

Made from 316 stainless steel, this adapter offers excellent resistance to corrosion, making it suitable for harsh conditions.

Answer by: Customer Support on Sep 3, 2025, 1:11 PM

got a 3/8-18 male NPT port, will this countersunk hex plug screw right in?

Question by: Howard K on Mar 17, 2026, 4:13 PM

The key detail is the thread. This part has a 3/8-18 male NPT thread, so it matches ports and fittings that are also 3/8-18 NPT female.

Answer by: Customer Support on Mar 19, 2026, 6:20 AM

Model Number	Thread 1	Hex	B
CP-1/4	1/4-18	0.25	0.41
CP-1/2	1/2-14	0.375	0.54
CP-1/8	1/8-27	0.1875	0.27
CP-3/8	3/8-18	0.3125	0.41
CP-1	1-11-1/2	0.625	0.69