Fleetguard · HF Hydraulic · inline line
HF6399 filter element: specifications & equivalents
The HF6399 is a Fleetguard inline-line hydraulic filter element, sized 150.01 × 454.15 mm OD × length (ID 109.96 mm), rated at 15.8 µm absolute (15.8 µm at β75(c) per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 150.01 × 454.15 mm
Inside diameter 109.96 mm
Filtration rating 15.8 µm abs.
Beta rating 15.8 µm at β75(c) per ISO 16889
Collapse / burst 10 bar
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 | 15.8 µm |
| Rating basis | absolute |
| Beta ratio | 15.8 µm at β75(c) per ISO 16889 |
| Outside diameter OD | 150.01 mm |
| Inside diameter ID | 109.96 mm |
| Length | 454.15 mm |
| End caps | open-ended cartridge element |
| Collapse / burst pressure | 10 bar |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6399 |
| 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.
Dimensions & series range
| Outside diameter | 150.01 mm (5.906 in) |
| Inside diameter | 109.96 mm (4.329 in) |
| Overall length | 454.15 mm (17.880 in) |
All 150×454 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1535213 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1535213 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 335C7872 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 335C7872 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3I2083 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3I2083 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4252125 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4252125 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4269317 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4269317 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 47757762 page in verification queue | UFI | partial | Fleetguard's online catalog lists 47757762 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 557803 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 557803 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 57803 | WIX Filters | partial | Fleetguard's online catalog lists 57803 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 72130513 page in verification queue | UFI | partial | Fleetguard's online catalog lists 72130513 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7803 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 7803 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 84273710 page in verification queue | UFI | partial | Fleetguard's online catalog lists 84273710 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 84803 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 84803 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 91803 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 91803 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AT127608 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AT127608 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AT147343 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AT147343 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ BT8380 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists BT8380 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ C7555 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists C7555 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ EY1058HD612 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists EY1058HD612 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H27271 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H27271 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H85680 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H85680 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HD15174/1X | MANN-FILTER | partial | MANN-FILTER's online catalog lists HF6399 (FLEETGUARD/CUMMINS FILTRATION) as a comparison number for HD151741X. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ HD15174/1X | MANN-FILTER | partial | Fleetguard's online catalog lists HD151741X as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0639900 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0639900 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF997 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF997 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ KRJ20710 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists KRJ20710 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L4206705 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L4206705 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LH5953 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LH5953 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LH8488 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LH8488 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550702 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550702 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8380 | Baldwin Filters | partial | Fleetguard's online catalog lists PT8380 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RAB83801825GB page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RAB83801825GB as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SA114100040 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SA114100040 as an interchange for HF6399. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH66094 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH66094 as an interchange for HF6399. 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 HF6399 model number is decoded
- HF6399Fleetguard HF-series hydraulic cartridge element part number.
- 454.15 mmOverall height.
- 150.01 mmLargest outside diameter.
- 109.96 mmLargest end inside diameter.
- 15.8 µm at β75(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 are the dimensions of the HF6399 filter element?
The published envelope is 150.01 mm OD × 454.15 mm length with a 109.96 mm inside diameter (5.906 × 17.880 in × 4.329 in ID). Confirm against the housing drawing before ordering.
What micron rating does HF6399 use?
This element is rated 15.8 µm absolute — 15.8 µm at β75(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 HF6399 filter element?
33 partial match(es) requiring parameter review
How do I read the HF6399 part number?
See the designation decoder above: each segment of HF6399 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.
Same-envelope elements from other brands
View full interchange →These 4 catalog element(s) share the 150×454 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.
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.