Steel Bulkhead Locknut, 9/16-18 Thread

Description & Features

Designed for use with Eaton Aeroquip 210212 Series fittings, this Steel Bulkhead Locknut, 9/16-18 Thread secures bulkhead-mounted hydraulic connections in panel or wall installations. With a 9/16-18 thread and a compact profile, A dimension 0.27 in., B dimension 0.81 in., it is suited for applications where space constraints require a low-profile locking solution.

Cataloged under Eaton Aeroquip part number C1BB84, this locknut is a genuine spare part intended to maintain the integrity of existing bulkhead fitting assemblies. Steel construction provides the durability expected in demanding hydraulic environments.

SKU: 210212-6S

Supplier Part Number (MPN): 210212-6S

Alternate Part Numbers: C1BB84, MI-00317856, MINO-00015F64775

Specifications

A
0.27
Alternate Part Numbers
Alternate Part Number C1BB84, Alternate Part Number MI-00317856, Alternate Part Number MINO-00015F64775, Alternate Part Number MINO-00402X01913
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

Similar Products

Model Number Tube O.D. Thread 2 A B Price Action
Steel Bulkhead Locknut, 1/2-20 Thread

210212-5S Steel Bulkhead Locknut

0.31

1/2-20

0.25

0.75

Steel Bulkhead Locknut, 9/16-18 Thread

210212-6S Steel Bulkhead Locknut

0.38

9/16-18

0.27

0.81

Steel Bulkhead Locknut, 3/4-16 Thread

210212-8S Steel Bulkhead Locknut

0.5

3/4-16

0.31

1

Steel Bulkhead Locknut, 2-1/2 - 12 Thread

0306-32 Steel Bulkhead Locknut

2

2-1/2 - 12

0.22

0.63

Steel Bulkhead Locknut, 7/8-14 Thread

210212-10S Steel Bulkhead Locknut

0.63

7/8-14

0.36

1.12

Steel Bulkhead Locknut, 1-1/16 - 12 Thread

210212-12S Steel Bulkhead Locknut

0.75

1-1/16 - 12

0.41

1.38

Steel Bulkhead Locknut, 7/16-20 Thread

210212-4S Steel Bulkhead Locknut

0.25

7/16-20

0.25

0.69

Product Questions & Answers (2)

Question by: Shane E on Oct 13, 2025, 12:21 PM
Trying to swap out a bulkhead nut, is this one the 9/16-18 thread?
Answer by: Customer Support on Oct 15, 2025, 9:20 AM
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.
Question by: Neil W on Sep 3, 2025, 1:13 PM
Will this locknut fit a standard 9/16-18 threaded fitting, or is it a proprietary size?
Answer by: Customer Support on Sep 4, 2025, 3:40 PM
It's made to fit any standard 9/16-18 threaded part. It's a common size.