B · official + dimensions6 equivalents · 5 brands

BREATHER FILTER cross-reference — Caterpillar®, Fleetguard®, Baldwin®, Donaldson®

HS-FS405one HiStar element — compatible replacement for every part below

BREATHER FILTER · 6 interchangeable part numbers across 5 brands

Dimensions: OD 77 mm · ID 74 mm · H 70 mm · thread 3/8"-NPTF

Typical applications: CATERPILLAR

Interchangeable cross-brand part numbers

Caterpillar®

9 C 4937

Fleetguard®

AB 15803, AS 2512

Baldwin®

BT 40015

Donaldson®

P 50-2605

HIFI Filter®

FS 405

Quote source

HiStar Filter® HS-FS405 Request a quote for this part → Prefilled with your part — reply within 24h · low minimums · European supply.

The Caterpillar 9 C 4937 breather filter cross-references to HiStar HS-FS405 — a compatible replacement element that also matches Fleetguard, Baldwin, Donaldson, and 6 interchangeable OEM part numbers in total. Same form, fit and function, OD 77 mm, ID 74 mm, H 70 mm; fits CATERPILLAR. Verified against the manufacturer's own cross-reference.