FACTORY COMPARISON / FIRST ORDER
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3/8 hydraulic hose is a measured bore string (Volume 700, observed 2026-07-20). It names an inner diameter, not a pressure class, a temperature rating, or a finished assembly. Translate the project into purchase requirements; do not treat application copy as a promised field result.
What the project actually demands of 3/8 hydraulic hose is the service temperature in °F or °C next to the fluid, plus abrasion and bend at the implement. A site condition such as a tight wrap around a boom changes the cover and whether a hydraulic hose protector is required. Those are specification changes, not a reason to accept a lower unit price on a thinner cover.
Write in the request: inner diameter 3/8 in or the metric equivalent the drawing uses; working pressure in psi the supplier must confirm; end type; finished length; and whether the hose is routed near exhaust heat. Assumptions that “3/8 always means the same spiral hose” must be confirmed in writing.
A hydraulic hose press on the floor is a machine. The 3/8 hydraulic hose feeding it still needs temperature, medium, and impulse expectation. Impulse or peak pressure that exceeds the confirmed working pressure is a requirement change. Do not convert a catalogue 350 bar 2SN example into this circuit’s rating unless the factory attaches that construction to the quoted item.
Replacement buyers often send a photo. Site mud, UV, and clamp spacing change the cover and wrap, not only the price. Confirm whether hydraulic hose fittings are reused or new. A competitor part number is a cross-reference the factory may or may not accept; the cross still has to be written down.
OEM files may already name SAE or EN construction. Copy those callouts onto the RFQ. If the receiving plant will file IATF 16949 or PPAP evidence, say so. This desk will request those files from the named factory; we will not stamp them as our own.
Industry dispute recorded in this sector’s configuration: thermoplastic elastomer (TPE / TPU) jackets run on faster molding cycles and can be reprocessed, which helps some OEM interiors and appliance parts. Vulcanized rubber (EPDM, NBR, HNBR, peroxide-cured silicone) still holds compression set, tear strength and continuous service above about 120°C on dynamic hoses and heavy gaskets. For 3/8 hydraulic hose, treat a TPU cover suggestion as a new request: re-state temperature, oil, and abrasion. Do not accept a silent substitution because the bore is unchanged.