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Main Filter Inc. offers quality spin-on heads in a variety of configurations to fit many of the most popular spin-ons in the industry. With our wide variety of port sizes, our adapters are easy to install and use.

Our aluminium filter heads are compatible with petroleum-based oil, are available with or without a bypass and can be used in a wide variety of mobile applications such as cranes, excavators, trenchers, wood splitters, chippers and much more.

We offer a variety of spin-ons in various media and micron ratings to complement numerous applications. View available spin-on configurations.

FH1 Series

Main filter filter head Series FH1 is a single adapter with an Nominal Spin-On OD of 5" and a nose thread size of 1-1/2" - 16 supports the following spin-ons series SP1A, SP1B and is available in the following configurations:

Port size: 1" NPT
Gauge: No
By-pass: No

Stock (NC): 0
MSRP Price: 51.42
Port size: 1" NPT
Gauge: No
By-pass: 25#

Stock (NC): 12
MSRP Price: 45.16
Port size: 1" NPT
Gauge: Yes
By-pass: 25#

Stock (NC): 0
MSRP Price: 58.20
Port size: 1 - 1/4" NPT
Gauge: No
By-pass: No

Stock (NC): 0
MSRP Price: 50.67
Port size: 1 - 1/4" NPT
Gauge: Yes
By-pass: No

Stock (NC): 0
MSRP Price: 54.88
Port size: 1 - 1/4" NPT
Gauge: Yes
By-pass: 25#

Stock (NC): 0
MSRP Price: 61.48
Port size: 1 - 1/2" NPT
Gauge: No
By-pass: No

Stock (NC): 0
MSRP Price: 68.77
Port size: 1 - 1/2" NPT
Gauge: Yes
By-pass: 25#

Stock (NC): 0
MSRP Price: 67.96
Port size: 1" NPT
Gauge: Yes
By-pass: No

Stock (NC): 4
MSRP Price: 60.41
Port size: 1-1/2" NPT
Gauge: Yes
By-pass: No

Stock (NC): 0
MSRP Price: 69.15
Port size: 1 - 1/4" NPT
Gauge: Yes
By-pass: 25#

Stock (NC): 0
MSRP Price: 54.86

FH2 Series

Main filter filter head Series FH2 is a single adapter with an Nominal Spin-On OD of 3.75" and a nose thread size of 1" - 12 supports the following spin-ons series SP2A, SP2B and is available in the following configurations:

Port size: 3/4" NPT
Gauge: No
By-pass: No

Stock (NC): 12
MSRP Price: 35.07
Port size: 3/4" NPT
Gauge: Yes
By-pass: No

Stock (NC): 0
MSRP Price: 35.17
Port size: 3/4" NPT
Gauge: No
By-pass: 3#

Stock (NC): 0
MSRP Price: 36.39
Port size: 3/4" NPT
Gauge: No
By-pass: 25#

Stock (NC): 0
MSRP Price: 37.57
Port size: 3/4" NPT
Gauge: Yes
By-pass: 25#

Stock (NC): 0
MSRP Price: 108.97
Port size: 1/2" NPT
Gauge: Yes
By-pass: NA

Stock (NC): 0
MSRP Price: 37.87

FH3 Series

Main filter filter head Series FH3 is a single adapter with an Nominal Spin-On OD of 3.75" and a nose thread size of 1-1/2" - 16 supports the following spin-ons series SP3A, SP3B and is available in the following configurations:

Port size: 1" NPT
Gauge: No
By-pass: No

Stock (NC): 12
MSRP Price: 47.58
Port size: SAE 20
Gauge: Yes
By-pass: 25#

Stock (NC): 0
MSRP Price: 106.36

FH4 Series

Main filter filter head Series FH4 is a single adapter with an Nominal Spin-On OD of 3.75" and a nose thread size of 3/4" - 14 BSP supports the following spin-ons series SP4A, SP4B and is available in the following configurations:

Port size: 3/4" - 14 BSP
Gauge: No
By-pass: No

Stock (NC): 12
MSRP Price: 57.16

FH5 Series

Main filter filter head Series FH5 is a dual adapter with an Nominal Spin-On OD of 5" and a nose thread size of 1-1/2" - 16 supports the following spin-ons series SP1A, SP1B and is available in the following configurations:

Port size: 2" NPT
Gauge: No
By-pass: No

Stock (NC): 2
MSRP Price: 285.58
Port size: 2" NPT
Gauge: Yes
By-pass: No

Stock (NC): 0
MSRP Price: 308.14

Gauges

60# filter head gauge

This easy-to-read gauge will let you know when it time to replace your filter.

One of the largest hydraulic cross references available!

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