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Steel Bulkhead Locknut, 7/8-14 Thread

A 0.36	Alternate Part Numbers Alternate Part Number C1BB80, Alternate Part Number MI-00317872, Alternate Part Number MINO-00015F64777	B 1.12	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 210212-10S	Thread 2 7/8-14	Thread Sealant No	Tube O.D. 0.63	Tube O.D. 0.63	Type Flared nut	Product Weight 0.05 lbs

Product Questions & Answers 3

Product Questions & Answers

i’ve got a bulkhead fitting with 7/8-14 threads, is this the right locknut for it

Question by: Hugh P on Nov 9, 2025, 11:54 AM

For a 7/8-14 bulkhead thread, this is the matching steel bulkhead locknut. It’s an Eaton Aeroquip spare part from the 210212 series (catalog number C1BB80), intended to secure a bulkhead-style fitting through a panel.

Answer by: Customer Support on Nov 11, 2025, 6:09 AM

Will this work on a Danfoss 210212 series fitting? Just want to make sure before I order.

Question by: Clint C on Aug 2, 2025, 6:57 AM

This bulkhead locknut is a spare part for the Danfoss / Eaton 210212 series. It should fit just fine.

Answer by: Customer Support on Aug 3, 2025, 12:27 PM

does this replace the original eaton 210212 bulkhead nut, or is it just a similar fit?

Question by: Ralph P on Sep 3, 2025, 7:28 PM

Same part, different label. The SKU 210212-10S is a genuine Danfoss/Eaton 210212 series spare part, catalog number C1BB80 from Eaton Aeroquip. If your original equipment used a 210212 series bulkhead nut, this is the direct replacement for it.

Answer by: Customer Support on Sep 4, 2025, 7:30 PM

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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