Spring Hose Clamps
| Standard | DIN · SAE · OEM drawing |
|---|---|
| Material | 65Mn spring steel |
| Strength Grade | — |
| Size Range | 6-50mm (by hose OD) |
| Surface Treatment | Zinc plated |
01
Product Description
Product Description & Key Specifications
65Mn spring hose clamps (also called constant-tension or spring band clamps) are formed from spring steel strip and zinc plated for automotive coolant, fuel, vacuum, breather and light equipment hose connections. They apply a continuous spring force around the hose to help maintain sealing under vibration and temperature change.
Unlike worm-drive hose clamps, spring clamps are selected by hose outside diameter and open/close profile rather than a screw-adjusted range. RFQs should confirm hose OD, band width, opening style, material (65Mn), coating, working temperature and quantity. Common sizes typically fall in the 6-50 mm OD band depending on the OEM series.
Zinc-plated 65Mn spring clamps are the mainstream choice for passenger-vehicle and light-machinery hose lines. They are not structural fasteners and should not be used as pressure-rated flange clamps or safety-critical retainers unless the project specification approves the clamp type. For corrosive or marine hose service, consider stainless worm-drive clamps as an alternative product line.
| Product type | Spring / constant-tension hose clamps |
|---|---|
| Standards | SAE / DIN / OEM drawing reference |
| Material | 65Mn spring steel |
| Strength grade | Spring temper per OEM / drawing (no bolt strength class) |
| Size range | Typically 6-50 mm by hose outside diameter |
| Common models | 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 25 / 28 / 32 / 35 / 38 / 40 / 45 / 50 mm OD series |
| Clamp design | Spring band with ears / tabs for pliers installation (OEM profile by order) |
| Surface finish | Zinc plated |
| Documentation | CoC, material certificate and dimensional report on request |
02
Selection
Selection Advantages by Application
Automotive Coolant & Fuel Hoses
65Mn spring hose clamps are widely used on coolant, heater, fuel and vacuum lines where constant tension and fast assembly are required. Confirm hose OD, ear style and coating with the vehicle or Tier-1 drawing.
Automotive & EV fastenersConstruction & Machinery Hose Lines
Zinc-plated spring clamps suit light construction equipment and machinery auxiliary hoses exposed to vibration. For larger adjustable ranges or outdoor chloride exposure, evaluate worm-drive alternatives.
Construction fastenersRailway Auxiliary Hose Routing
Spring clamps can support non-structural auxiliary hose and duct routing on rolling-stock interiors and equipment bays when specified by the project BOM.
Railway fasteners03
Assembly
Recommended Matching Products
04
Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
65Mn strip blanking, forming and spring tempering by clamp seriesIncoming 65Mn strip chemistry and hardness verification
Ear / tab forming and opening calibration to hose ODOD fit, band width and opening force checks
Zinc plating and surface finishingCoating appearance, adhesion and salt-spray checks when specified
OEM / drawing-based clamp profilesDimensional report against customer drawing on request
Bag, box or bulk export packagingCoC, MTC and packing list prepared for shipment
05
FAQ
Common Questions Before RFQ
What material is used for spring hose clamps?
Mainstream spring hose clamps use 65Mn spring steel with zinc plating. Stainless spring clamps are a separate specialty line and should be quoted separately if required.
How do I select the size?
Measure the hose outside diameter under assembly conditions and match the clamp OD series. Also confirm band width, ear style and any OEM drawing number.
Spring clamp vs worm-drive clamp — which should I use?
Use spring clamps for fixed hose OD, constant tension and fast assembly (typical automotive lines). Use worm-drive clamps when you need an adjustable diameter range, stainless corrosion resistance or larger hose/duct sizes.
Can spring hose clamps be used on high-pressure lines?
Only when the hose system and project specification approve this clamp type. Do not assume suitability for high-pressure or safety-critical joints without engineering confirmation.
What surface finish is standard?
Zinc plating is the standard finish for 65Mn spring hose clamps. Other coatings can be reviewed against OEM requirements.
Need 65Mn spring hose clamps?
Send hose OD, band width, ear style, coating, quantity and any OEM drawing. Our team can confirm suitable 65Mn zinc-plated spring clamp supply.
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