Filtrec · Filtrec elements · inline line

A421G40 filter element: specifications & equivalents

Q: What are the dimensions of the A421G40 filter element?

The published envelope is 117 mm OD × 297.5 mm length (4.606 × 11.713 in). Confirm against the housing drawing before ordering.

Q: What micron rating does A421G40 use?

This element is rated 35 µm absolute — β35(c)≥1000. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The A421G40 is a Filtrec inline-line hydraulic filter element, built with glassfiber media, sized 117 × 297.5 mm OD × length, rated at 35 µm absolute (β35(c)≥1000). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 117 × 297.5 mm

Filtration rating 35 µm abs.

Beta rating β 35(c)≥1000

Media glassfiber

Line type inline

Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-10-03. Confidence score 0.90.

Dimensions and media grade are taken from Filtrec’s official Cross Navigator, which maps this element to specific competitor part numbers. Filtrec does not publish collapse pressure or seal compound in this API for every code — verify collapse rating, seal execution and bypass setting against the current Filtrec data sheet for the target housing before ordering.

Specification table

Parameter	Value
Filter type	inline line
Media	glassfiber
Filtration rating	35 µm
Rating basis	absolute
Beta ratio	β35(c)≥1000
Outside diameter OD	117 mm
Length	297.5 mm
Integral bypass valve	none (housing/valve-dependent)
Manufacturer part no.	A421G40
Source catalog	Filtrec S.p.A.: Filtrec Cross Navigator
Last verified	2026-10-03

Sources: Filtrec S.p.A. — Filtrec Cross Navigator — accessed 2026-10-03.

Filtrec® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Filtrec distributor.

Dimensional drawing

Reference drawing generated from the source values cited on this page — nominal envelope, schematic section, not a manufacturer drawing. The PDF is A3 landscape and vector; the PNG is sized for a WhatsApp preview. Confirm thread, end caps, seal compound and micron/Beta grade against the original element before ordering.

Dimensions & series range

Outside diameter	117 mm (4.606 in)
Overall length	297.5 mm (11.713 in)

All 117×298 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ 9576P165672 page in verification queue	Aftermarket	full	Filtrec's official Cross Navigator maps FORD 9576P165672 to FILTREC A421G40 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade.
↔ 51721	WIX Filters	partial	Filtrec's official Cross Navigator maps WIX 51721 to FILTREC A421G40 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade. Rated micron differs (20 vs 35 µm) — verify efficiency class and collapse/seal for the housing before substituting.
↔ HF6585	Fleetguard	partial	Filtrec's official Cross Navigator maps FLEETGUARD HF6585 to FILTREC A421G40 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade. Rated micron differs (20 vs 35 µm) — verify efficiency class and collapse/seal for the housing before substituting.
↔ P165672	Donaldson	partial	Filtrec's official Cross Navigator maps DONALDSON P165672 to FILTREC A421G40 as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade. Rated micron differs (50 vs 35 µm) — verify efficiency class and collapse/seal for the housing 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.

Full chart: Filtrec cross reference chart →

How the A421G40 model number is decoded

G40Filtrec internal media grade code (glassfiber, 35 µm).

Typical equipment & applications

Filtrec aftermarket replacement hydraulic/lube filter element (A family), form-fit-function cross-referenced in Filtrec's official Cross Navigator.

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.

Frequently asked questions

What are the dimensions of the A421G40 filter element?

The published envelope is 117 mm OD × 297.5 mm length (4.606 × 11.713 in). Confirm against the housing drawing before ordering.

What micron rating does A421G40 use?

This element is rated 35 µm absolute — β35(c)≥1000. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the A421G40 filter element?

1 catalog-confirmed full match(es) (9576P165672); 3 partial match(es) requiring parameter review

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.

Same-envelope elements from other brands

View full interchange →

These 10 catalog element(s) share the 117×298 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

A421C10 Filtrec · 10 µm A421C25 Filtrec · 25 µm A421G06 Filtrec · 7 µm A421G06V Filtrec · 7 µm A421G10 Filtrec · 12 µm A421G15 Filtrec · 17 µm A421G15V Filtrec · 17 µm A421G25 Filtrec · 22 µm A421G25V Filtrec · 22 µm A421T125 Filtrec · 125 µm

Other models in the Filtrec elements series

All 9874 (list page 1/20) →

A105C05 96×60 mm · 5 µm A105C10 96×60 mm · 10 µm A105C25 96×60 mm · 25 µm A105G03 96×60 mm · 5 µm A105G06 96×60 mm · 7 µm A105G10 96×60 mm · 12 µm A105G25 96×60 mm · 22 µm A105T125 96×60 mm · 125 µm A105T250 96×60 mm · 250 µm A105T60 96×60 mm · 60 µm

Reviewed & verified by the ElementRef engineering desk against Filtrec S.p.A. on 2026-10-03. Read our editorial & correction policy.