Pyi Inc Hose Clamps

PYI Inc Hose Clamps: Marine-Grade Engineering You Can Trust

PYI Inc. has been a leading name in high-quality marine hardware since 1981, and their line of hose clamps reflects the same exacting standards that have earned them loyalty among boaters, commercial mariners, and industrial professionals for decades. When a hose clamp fails in a marine environment, the consequences can be serious — which is exactly why PYI engineered their clamps from the ground up to handle the worst conditions the sea can throw at them.

All 316L Stainless Steel — Every Component

What sets PYI hose clamps apart from most competitors is the uncompromising choice of material: every single component — band, housing, and screw — is manufactured from 316L stainless steel. Many "stainless" hose clamps on the market use 316 steel only for the band while relying on lesser-grade hardware for the screw housing, creating a weak point that corrodes first. PYI eliminates that risk entirely.

316L SS utilizes a higher percentage of molybdenum, chromium, and nickel than standard 304 stainless steel. The addition of molybdenum specifically improves resistance to corrosion and chloride pitting, provides greater creep resistance over time, and delivers a stronger stress-to-rupture and tensile strength at elevated temperatures — up to 932°F (500°C). This means the clamp maintains a consistent, strong clamping force throughout its service life without deforming under sustained tension.

The PYI Worm Gear Hose Clamp: Design Details That Matter

The PYI Worm Gear Hose Clamp features a non-perforated, rolled-edge, embossed band paired with a one-piece double-locked screw cage machined from a single piece of 316L stainless steel. The non-perforated interior surface is a deliberate design choice — it allows the clamp to be used safely on even the softest hoses without cutting or abrading the hose surface during installation or over time. The clamps can be hand-tightened to 15.5 NM (135 in/lbs.) without screw slippage or cage distortion, providing a reliably strong and stable hold even under high internal hose pressure. Sizes range from ½" all the way to 7¼" (13mm – 180mm), covering virtually every hose diameter found on boats, engines, and industrial systems.

ISO 9001:2015 Certified Manufacturing

PYI hose clamps are produced in a facility that is ISO 9001:2015 certified by Bureau Veritas, which means quality control is verified and audited at every stage of the manufacturing process — from raw material selection through finished product. For professionals and serious DIYers, that certification is meaningful assurance that each clamp meets documented performance standards.

The Clamp Jacket: A Uniquely PYI Innovation

PYI also offers their signature Clamp Jacket — an EPDM rubber sleeve that slips over the exposed tail of a worm gear hose clamp to protect users from cuts and scrapes. EPDM rubber is highly resistant to weathering, brake fluids, acids, alkalies, and steam, making it well-suited for engine bays and bilge environments alike. It's a thoughtful finishing touch that's practical for marine mechanics, automotive enthusiasts, and industrial installers across the board.

Whether you're refitting a sailboat through-hull, securing coolant lines on an inboard engine, or tackling a demanding industrial plumbing job, PYI Inc. hose clamps deliver the material integrity and design refinement to do it right the first time. Browse the full selection of hose clamps or explore everything PYI Inc. has to offer.