Fleetguard · HF Hydraulic · inline line
HF7921 filter element: specifications & equivalents
The HF7921 is a Fleetguard inline-line hydraulic filter element, sized 112 × 439.2 mm OD × length (ID 69.1 mm). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 112 × 439.2 mm
Inside diameter 69.1 mm
Beta rating 23 µm at β200(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 |
| Beta ratio | 23 µm at β200(c) per ISO 16889 |
| Outside diameter OD | 112 mm |
| Inside diameter ID | 69.1 mm |
| Length | 439.2 mm |
| End caps | open-ended cartridge element |
| Rated flow | 170 L/min |
| Collapse / burst pressure | 10 bar |
| Integral bypass valve | none (housing/valve-dependent) |
| Manufacturer part no. | HF7921 |
| 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 | 112 mm (4.409 in) |
| Inside diameter | 69.1 mm (2.720 in) |
| Overall length | 439.2 mm (17.291 in) |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
|
↔ 1541 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 1541 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 247490038 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 247490038 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 24749003B page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 24749003B as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 24749008 page in verification queue | UFI | partial | Fleetguard's online catalog lists 24749008 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4111927 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4111927 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4132686 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4132686 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4156753 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4156753 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4159319 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4159319 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4227353 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4227353 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 4508505 page in verification queue | UFI | partial | Fleetguard's online catalog lists 4508505 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ 51541 | WIX Filters | partial | Fleetguard's online catalog lists 51541 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 551541 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 551541 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 645P page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 645P as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 7004884 page in verification queue | UFI | partial | Fleetguard's online catalog lists 7004884 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 71402547 page in verification queue | UFI | partial | Fleetguard's online catalog lists 71402547 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 76591526 page in verification queue | UFI | partial | Fleetguard's online catalog lists 76591526 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 85541 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 85541 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ 92541 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists 92541 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AS823 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AS823 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ AT308569 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists AT308569 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ CE1281H page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists CE1281H as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FH1008 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FH1008 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ FJ119 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists FJ119 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ H12014X page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists H12014X as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HF0792100 page in verification queue | Fleetguard | partial | Fleetguard's online catalog lists HF0792100 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L4227353 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L4227353 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ L691 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists L691 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ P173207 page in verification queue | Donaldson | partial | Fleetguard's online catalog lists P173207 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT754 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PT754 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ PT755 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists PT755 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8388 | Baldwin Filters | partial | Fleetguard's online catalog lists PT8388 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8388 | Baldwin Filters | partial | Baldwin's Form 561 Number-Finder cross-reference lists HF7921 (FLEETGUARD) as replaced by Baldwin PT8388. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8389 | Baldwin Filters | partial | Fleetguard's online catalog lists PT8389 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
| ↔ PT8389 | Baldwin Filters | partial | Baldwin's Form 561 Number-Finder cross-reference lists HF7921 (FLEETGUARD) as replaced by Baldwin PT8389. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ RP903 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists RP903 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ SH60149 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists SH60149 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ TH101885 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists TH101885 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ VH6109 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists VH6109 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ X4156753 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists X4156753 as an interchange for HF7921. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ X4159319 page in verification queue | Aftermarket | partial | Fleetguard's online catalog lists X4159319 as an interchange for HF7921. 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 HF7921 model number is decoded
- HF7921Fleetguard HF-series hydraulic cartridge element part number.
- 439.2 mmOverall height.
- 112 mmLargest outside diameter.
- 69.1 mmLargest end inside diameter.
- 23 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 are the dimensions of the HF7921 filter element?
The published envelope is 112 mm OD × 439.2 mm length with a 69.1 mm inside diameter (4.409 × 17.291 in × 2.720 in ID). Confirm against the housing drawing before ordering.
What replaces the HF7921 filter element?
40 partial match(es) requiring parameter review
How do I read the HF7921 part number?
See the designation decoder above: each segment of HF7921 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.