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Steel 4-Bolt Flange Adapter, 1.25 Inch Code 61 Flange, O-Ring Half To 1.25 Inch Female NPT, Straight with Counterbore

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Description & Features

The Steel 4-Bolt Flange Adapter 1.25 Inch Code 61 Flange O-Ring Half To 1.25 Inch Female NPT Straight with Counterbore by Anchor Fluid Power offers reliable performance for industrial applications. This adapter includes mounting bolts lock washers and a Buna-N O-Ring for secure installations. The 1.25 inch pad size and 1.25 inch pipe size ensure compatibility with various setups. Designed to meet the demands of industry professionals this flange adapter features a 1-1/4-11-1/2 thread. This robust and durable adapter is ideal for heavy-duty use providing a secure connection for your systems. The straight design with counterbore facilitates easy alignment and fitting.

Supplier Part Number: W43-20-20U

Specifications

Brand
ANCHOR FLUID POWER
a Dimensions
2.88 in
b Dimensions
3.12 in
c Dimensions
1.188 in
Connection Size 1
1-1/4 in
Connection Size 2
1-1/4 in
Connection Type
Flanged, NPT
Connection Type 1
SAE Code 61 O-ring Flange
Connection Type 2
NPTF
d Dimensions
2.312 in
Dimensions
3.12 in H x 2.68 in W x 1.61 in D
f Dimensions
1.03 in
Fitting Type
Flange
Flange Size
0.83 in THK
h Dimensions
1-1/4 in
k Dimensions
0.469 in
Material
Steel
Material Construction
Carbon Steel
Number of Bolt Holes
4
Series
W Series
Thread Sealant
Without Thread Sealant
Thread Size
1-1/4-11-1/2

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Product Questions & Answers (2)

Question by: Gary M on Apr 24, 2025, 8:32 PM
trying to swap out a flange to pipe adapter, is this one the code 61 1-1/4 flange half to 1-1/4 female npt?
Answer by: Customer Support on Apr 26, 2025, 2:58 PM
It matches a 1.25 inch Code 61 4-bolt flange O-ring half on one end and a 1.25 inch female NPT on the other, with a 1-1/4-11-1/2 NPT thread.
Question by: Ronnie C on Dec 16, 2025, 7:57 AM
What size bolts does this flange adapter use? Just wanna make sure I have everything I need before I start.
Answer by: Customer Support on Dec 18, 2025, 6:26 AM
Mounting bolts and lock washers are included with this Anchor Fluid Power flange adapter, along with a Buna-N O-ring.

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