Steel Bulkhead Locknut, 9/16-18 Thread

A 0.27	Alternate Part Numbers Alternate Part Number C1BB84, Alternate Part Number MI-00317856, Alternate Part Number MINO-00015F64775	B 0.81	Brand Danfoss Power Solutions (II LLC Aeroquip)	Brand Aeroquip	Pack Size 1.00	UOM EA	Finish None	Materials Carbon steel	Series 210212	Supplier Part Number 210212-6S	Thread 2 9/16-18	Thread Sealant No	Tube O.D. 0.38	Tube O.D. 0.38	Type Locknut	Product Weight 0.02 lbs

Product Questions & Answers

Trying to swap out a bulkhead nut, is this one the 9/16-18 thread?

Question by: Shane E on Oct 13, 2025, 12:21 PM

The key callout is Thread 2: 9/16-18. It’s a steel bulkhead locknut in the Danfoss Power Solutions 210212 series, supplier part number 210212-6S.

Answer by: Customer Support on Oct 15, 2025, 9:20 AM

Will this locknut fit a standard 9/16-18 threaded fitting, or is it a proprietary size?

Question by: Neil W on Sep 3, 2025, 1:13 PM

It's made to fit any standard 9/16-18 threaded part. It's a common size.

Answer by: Customer Support on Sep 4, 2025, 3:40 PM

Model Number	Tube O.D.	Thread 2	A	B
210212-5S	0.31	1/2-20	0.25	0.75
210212-6S	0.38	9/16-18	0.27	0.81
210212-8S	0.5	3/4-16	0.31	1
0306-32	2	2-1/2 - 12	0.22	0.63
210212-10S	0.63	7/8-14	0.36	1.12
210212-12S	0.75	1-1/16 - 12	0.41	1.38
210212-4S	0.25	7/16-20	0.25	0.69