Envelope interchange · 3.11×12.95 in
79×329 mm filter elements
15 elements from 2 brand(s) share this envelope: 79 mm outside diameter and 329 mm overall length (3.11×12.95 in).
Dimensional interchange — verify before substituting. These cartridges fit the
same bowl space; they are not guaranteed drop-in equivalents. Compare grade,
end caps, seals, collapse rating and bypass configuration for the specific duty.
| Model | Brand | ID (mm) | Micron | β rating | Collapse (bar) | Bypass | Seal | Type |
|---|---|---|---|---|---|---|---|---|
| 51689 | WIX Filters | 42 | 5 | β2 = 2, β20 = 3 | — | housing | Nitrile (NBR) | return |
| 51690 | WIX Filters | 42 | 9 | — | — | housing | Nitrile (NBR) | return |
| HF30158 | Fleetguard | — | — | — | — | housing | — | inline |
| HF30159 | Fleetguard | — | — | — | — | housing | — | inline |
| HF30294 | Fleetguard | 43.33 | — | — | — | housing | — | inline |
| HF30524 | Fleetguard | — | — | — | — | housing | — | inline |
| HF30779 | Fleetguard | — | — | — | — | housing | — | inline |
| HF7072 | Fleetguard | — | — | — | — | housing | — | inline |
| HF7073 | Fleetguard | 42.42 | 20.9 | 20.9 µm at β75(c); 24.6 µm at β200(c) per ISO 16889 | 10.34 | housing | — | inline |
| HF7074 | Fleetguard | — | — | — | — | housing | — | inline |
| HF7075 | Fleetguard | — | — | — | — | housing | — | inline |
| HF7472 | Fleetguard | 42.42 | 5.1 | 5.1 µm at β75(c); 6.5 µm at β200(c) per ISO 16889 | 1.5 | housing | — | inline |
| HF7473 | Fleetguard | — | — | — | — | housing | — | inline |
| HF7474 | Fleetguard | 43.33 | 11.5 | 11.5 µm at β75(c); 12.9 µm at β200(c) per ISO 16889 | 1.5 | housing | — | inline |
| HF7475 | Fleetguard | — | — | — | — | housing | — | inline |
Substitution verification checklist
- Filtration grade. Compare at the same ISO 16889 Beta test point — “10 µm nominal” and “12 µm β1000” may be the same physical media.
- End caps & O-rings. Open/closed cap style and seal position block interchange even with identical OD/length.
- Seal compound. NBR is standard for mineral oil; phosphate-esters, high temperatures or bio-oils can demand fluorocarbon.
- Collapse rating. Low-collapse (~20 bar) return elements must never replace high-collapse (210 bar) pressure elements.
- Bypass strategy. Integral bypass valves (e.g. 3.4 bar) vs reusable housing valves change cold-start behaviour.
Frequently asked questions
Are all 79×329 mm filter elements interchangeable?
They share the same physical envelope — 79 mm OD and 329 mm length (3.11×12.95 in) — so they fit the same bowl. Interchangeability ends there: micron/Beta rating, end-cap geometry, seals, collapse rating and bypass configuration differ across the 15 elements listed and must be checked against the duty.
Is it a drop-in replacement if the OD and length match?
Only after verification. Confirm in order: (1) the filtration grade meets the ISO 4406 cleanliness target at the same Beta test point, (2) end-cap and O-ring arrangement is identical, (3) seal compound suits the fluid (NBR vs fluorocarbon), (4) collapse/burst rating fits pressure-line or cold-start conditions, and (5) the bypass strategy (integral valve vs housing valve) matches.
What is 79×329 mm in inches?
79×329 mm converts to approximately 3.11×12.95 in.
Browse all 79 mm OD elements or open the dimensions finder.
Request quote & availability
First reply within 2 business hours · first quotation — including the original brand and 1–2 verified equivalents — within 24 hours on business days.