Fleetguard · HF Hydraulic · inline line
HF6221 filter element: specifications & equivalents
The HF6221 is a Fleetguard inline-line hydraulic filter element, rated at 7 µm absolute (7 µm at β75(c); 10 µm at β200(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Inside diameter 76.2 mm
Filtration rating 7 µm abs.
Beta rating 7 µm at β75(c); 10 µm at β200(c) per ISO 16889
Line type inline
Catalog verified. Parameters extracted from the manufacturer’s electronic
catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.
Specifications and cross-references are taken from the Fleetguard online catalog API. Where both TWA and Beta ratings are published the conventions differ — verify cleanliness targets, collapse rating and seal configuration against the current Fleetguard data sheet before ordering.
Specification table
| Parameter | Value |
|---|---|
| Filter type | inline line |
| Filtration rating | 7 µm |
| Rating basis | absolute |
| Beta ratio | 7 µm at β75(c); 10 µm at β200(c) per ISO 16889 |
| Inside diameter ID | 76.2 mm |
| Length | 123.82 mm |
| End caps | open-ended cartridge element |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6221 |
| Source catalog | Cummins Filtration / Fleetguard: Fleetguard online product catalog (fleetguard.com) |
| Last verified | 2026-09-28 |
Sources: Cummins Filtration / Fleetguard — Fleetguard online product catalog (fleetguard.com) — accessed 2026-09-28.
Fleetguard® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Fleetguard distributor.
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1682 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1682 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3I1874 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3I1874 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 51682 | WIX Filters | partial | Fleetguard's online catalog lists 51682 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 52214178 page in verification queue | UFI | partial | Fleetguard's online catalog lists 52214178 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 551682 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 551682 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 658108 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 658108 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 756408 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 756408 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7630107 page in verification queue | UFI | partial | Fleetguard's online catalog lists 7630107 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85682 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85682 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 926566 | Parker | partial | Fleetguard's online catalog lists 926566 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92682 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92682 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ A3 | Schroeder Industries | partial | Schroeder online cross-reference (FLEETGUARD); envelope match — verify grade and seals. |
|
↔ C7383 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C7383 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CE1196H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CE1196H as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H926566 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H926566 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HA003BN page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HA003BN as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HA003P page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HA003P as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0622100 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0622100 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0622100JX page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0622100JX as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ MF0614533 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists MF0614533 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P164814 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P164814 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P167520 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P167520 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P30053B7 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P30053B7 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PL3053A page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PL3053A as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8468 | Baldwin Filters | partial | Fleetguard's online catalog lists PT8468 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RSCA53PV page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RSCA53PV as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RSCA55GV page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RSCA55GV as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RSCA55PV page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RSCA55PV as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ST6221 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ST6221 as an interchange for HF6221. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
Interchange levels: full catalog-confirmed drop-in · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the HF6221 model number is decoded
- HF6221Fleetguard HF-series hydraulic cartridge element part number.
- 123.82 mmOverall height.
- 76.2 mmLargest end inside diameter.
- 7 µm at β75(c); 10 µm at β200(c) per ISO 16889Published efficiency ratings.
Typical equipment & applications
- Construction, agricultural and industrial hydraulic circuits
- Mobile-equipment hydraulic return and pressure lines
Selection pitfalls — read before you substitute
- “10 µm nominal” and “12 µm at β1000” can describe the very same media — one is reported at β≥200, the other at β≥1000 per ISO 16889. Compare ratings at the same Beta test point, not just the printed micron number.
- Nitrile (NBR) seals are standard for mineral hydraulic oil but fail early in some phosphate-ester fluids and at sustained high temperature; verify seal compound against the fluid data sheet (fluorocarbon/Viton executions may be required).
- End-cap geometry and the number/position of O-rings block interchange even when OD and length match — visually compare end caps before fitting, especially with aftermarket cartridges.
Frequently asked questions
What micron rating does HF6221 use?
This element is rated 7 µm absolute — 7 µm at β75(c); 10 µm at β200(c) per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.
What replaces the HF6221 filter element?
29 partial match(es) requiring parameter review
How do I read the HF6221 part number?
See the designation decoder above: each segment of HF6221 encodes size, line type, filtration grade and media/collapse execution.
Is a same-envelope aftermarket element always a drop-in replacement?
No. Matching OD and length only proves the cartridge fits the bowl. End-cap style, seal compound, micron/Beta rating, collapse pressure and bypass configuration must also match; the table above tags every equivalent as full, partial or verify for exactly this reason.
How often should a hydraulic return-line element be replaced?
Replace at the housing manufacturer’s recommended differential-pressure setting (commonly signalled by a clogging indicator), or on a time-based service interval when no indicator is fitted — never wait for bypass to open continuously, because unfiltered oil then reaches the valves.
Other models in the HF Hydraulic series
All 2621 →Reviewed & verified by the ElementRef engineering desk against Cummins Filtration / Fleetguard on 2026-09-28. Read our editorial & correction policy.