Fleetguard · HF Hydraulic · return line
HF6318 filter element: specifications & equivalents
The HF6318 is a Fleetguard return-line hydraulic filter element, sized 118.52 × 261.49 mm OD × length, rated at 6 µm class (TWA 6 µm at β=2 per ISO 16889). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 118.52 × 261.49 mm
Filtration rating 6 µm nom.
Beta rating TWA 6 µm at β=2 per ISO 16889
Thread 1.00 5/16-12 UNS-2B
Line type return
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 | return line |
| Filtration rating | 6 µm |
| Rating basis | nominal |
| Beta ratio | TWA 6 µm at β=2 per ISO 16889 |
| Outside diameter OD | 118.52 mm |
| Length | 261.49 mm |
| Thread / connection | 1.00 5/16-12 UNS-2B |
| End caps | spin-on baseplate with attached gasket |
| Flow direction | outside-in |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF6318 |
| 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 | 118.52 mm (4.666 in) |
| Overall length | 261.49 mm (10.295 in) |
All 119×261 mm interchange elements →
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1618927 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1618927 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1620744 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1620744 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1930893 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1930893 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1992156 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1992156 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 1992159 page in verification queue | UFI | partial | Fleetguard's online catalog lists 1992159 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 2154 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 2154 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 2430667 page in verification queue | UFI | partial | Fleetguard's online catalog lists 2430667 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 25010643 page in verification queue | UFI | partial | Fleetguard's online catalog lists 25010643 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 25010975 page in verification queue | UFI | partial | Fleetguard's online catalog lists 25010975 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 25013612 page in verification queue | UFI | partial | Fleetguard's online catalog lists 25013612 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3082148 page in verification queue | UFI | partial | Fleetguard's online catalog lists 3082148 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 3A15078 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 3A15078 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 510661508 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 510661508 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 51623 | WIX Filters | partial | Fleetguard's online catalog lists 51623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 557623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 557623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 57623 | WIX Filters | partial | Fleetguard's online catalog lists 57623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 60033088 page in verification queue | UFI | partial | Fleetguard's online catalog lists 60033088 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 73074045 page in verification queue | UFI | partial | Fleetguard's online catalog lists 73074045 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 73142551 page in verification queue | UFI | partial | Fleetguard's online catalog lists 73142551 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 7623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 8406429 page in verification queue | UFI | partial | Fleetguard's online catalog lists 8406429 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 84623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 84623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 91623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 91623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92623 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92623 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 97520500172 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 97520500172 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 97520500236 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 97520500236 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 975205236 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 975205236 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 9990000391 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 9990000391 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 9Y4513 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 9Y4513 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ ABPN10GHF6243 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists ABPN10GHF6243 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ BT359 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists BT359 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FT80 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FT80 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H2650596 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H2650596 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H50264 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H50264 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HD223 page in verification queue | MANN-FILTER | partial | Fleetguard's online catalog lists HD223 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HD223L page in verification queue | MANN-FILTER | partial | Fleetguard's online catalog lists HD223L as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0631800 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0631800 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HFP550223 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HFP550223 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HP3613 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists HP3613 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L223 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L223 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LF271 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LF271 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ LFH4223 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists LFH4223 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ M1992156 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists M1992156 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ NEOHF6243 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists NEOHF6243 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P168022 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P168022 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P264 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P264 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P271 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P271 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P3613 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P3613 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P550223 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P550223 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P551227 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P551227 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PM224 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PM224 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PSH319 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PSH319 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SO8419H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SO8419H as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SPH9702 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SPH9702 as an interchange for HF6318. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ T171011 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists T171011 as an interchange for HF6318. 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 HF6318 model number is decoded
- HF6318Fleetguard HF-series hydraulic spin-on filter part number.
- 261.49 mmOverall height.
- 118.52 mmLargest outside diameter.
- 1.00 5/16-12 UNS-2BSpin-on mounting thread.
- TWA 6 µm at β=2 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
- A return-line element is not a pressure-line element: return cartridges (BN4HC low-collapse) tolerate roughly 20 bar differential, while BH4HC pressure executions are rated to 210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
- This element has no integral bypass — opening pressure is set by the housing’s reusable bypass valve. Confirm the valve setting (commonly 3.4 bar) is present before fitting.
- “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 HF6318 filter element?
The published envelope is 118.52 mm OD × 261.49 mm length (4.666 × 10.295 in). Confirm against the housing drawing before ordering.
What micron rating does HF6318 use?
This element is rated 6 µm (nominal class) — TWA 6 µm at β=2 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 HF6318 filter element?
57 partial match(es) requiring parameter review
How do I read the HF6318 part number?
See the designation decoder above: each segment of HF6318 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 1 catalog element(s) share the 119×261 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.