We are Riddhi Siddhi Impex, an ISO 9001, 14001, and 45001-certified stainless steel shims manufacturer and supplier operating from Mumbai since 2002. We slit shim stock in-house to ASTM, ASME, and AMS standards from mill-certified coils, processing any width between 3 mm and 2000 mm. We ship 15 austenitic, ferritic, and martensitic grades. A supply capacity of 400 to 500 tonnes per month and dispatch within 4 to 5 days keeps assembly schedules on track.
Stainless steel shims are thin flat spacers fitted between mating surfaces to fill gaps, level machine bases, and correct alignment during assembly. A fitter slips one behind a bearing housing or under a machine foot to true up the fit. Chromium above 10.5% builds a self-repairing oxide film, so the shim holds its thickness where plain steel packing would corrode and loosen. Buyers also call the product SS shims, packing shims, or stainless steel shim stock.
Every shim we offer is precision-slit from full-width coil at our own facility. Thickness runs from 0.03 mm to 5 mm. Material ships flat or as a stainless steel shim stock roll for convenient trimming on site. Deburred and round edges are available where specified. Ready stock at our Taloja and Mumbai warehouses covers fast-moving grades, and mill documentation provided upon request follows each batch from source coil to slit width.
We manufacture stainless steel shims in 15 grades: 10 austenitic, 4 ferritic, and 1 martensitic. The family sets the corrosion behaviour, and the grade sets the duty.
Austenitic grades dominate shim orders because they pair corrosion resistance with predictable flatness after slitting.
Rapid work-hardening gives Stainless Steel 301 Shims their spring-like stiffness, with harder tempers available on order.
View gradeMost orders on this page land on Stainless Steel 304 Shims: balanced corrosion resistance, wide availability, sensible cost.
View gradeThis low-carbon variant welds without carbide precipitation, making Stainless Steel 304L Shims the pick for fabricated assemblies.
View gradeFurnace doors and kiln hardware carry Stainless Steel 309 Shims for their scaling resistance.
View gradeSustained high-temperature spacing in burner and radiant-tube assemblies relies on Stainless Steel 310S Shims.
View gradeChloride-bearing washdown zones call for Stainless Steel 316L Shims: molybdenum handles pitting, low carbon protects welded packs.
View gradeWith more molybdenum again, Stainless Steel 317L Shims move into scrubber and harsher chemical duty.
View gradeTitanium stabilisation lets Stainless Steel 321 Shims sit against hot flanges without intergranular attack.
View gradeIn Stainless Steel 347 Shims, niobium provides the stabilisation, suiting refinery and power plant joints at temperature.
View gradeSevere sulphuric acid service is where Stainless Steel 904L Shims earn their premium, backed by copper and high nickel.
View gradeLow nickel content keeps ferritic pricing steady; we slit four grades.
Exhaust assembly work consumes most of the Stainless Steel 409 Shims we produce, spacing clamps and hangers economically.
View gradeStainless Steel 430 Shims suit dry indoor duty such as appliance and trim assembly; magnetic response aids handling.
View gradeWeldability around exhaust and heat exchanger frames comes from the titanium addition in Stainless Steel 439 Shims.
View gradeDual stabilisation keeps Stainless Steel 441 Shims true through repeated heat cycling.
View gradeMartensitic material trades some corrosion resistance for hardness gained through heat treatment.
Three finishes cover most shim orders: BA, 2B, Matte. The gauge and annealing route decide which applies.
BA
A bright annealed surface stays reflective and oxide-free, suited to instrument shims and visible assemblies.
2B
Cold rolling followed by annealing and pickling gives the smooth 2B surface most SS shims ship with.
Matte
Matte-finished shim stock hides handling marks and keeps glare down in exposed positions.
3 sectors specify the stainless steel shims issued from our warehouses. Grade choice follows corrosion environment and joint load.
Millwrights level pumps, motors, and gearboxes on Stainless Steel 304 Shims. Where a shim doubles as a spring element, work-hardened 301 material resists compression set, and Stainless Steel 410 Shims cover wear points between sliding surfaces.
Dairies and pharmaceutical plants shim conveyor frames and filling machines with Stainless Steel 304 Shims; daily washdown leaves them unmarked. Stronger cleaning agents and brines push buyers up to Stainless Steel 316L Shims. BA or 2B finishes suit hygienic zones.
Process plants pack flange gaps and level agitator drives with molybdenum-bearing grades. Stainless Steel 317L Shims stand up to scrubber condensate, and Stainless Steel 904L Shims take sulphuric acid exposure that would pit standard austenitic material.
Riddhi Siddhi Impex pairs three ISO certifications with heat-level traceability on every stainless steel shim order.
An EN 10204 Type 3.1 mill test certificate accompanies each consignment, recording chemistry and mechanical values against the mill heat. Type 3.2 is available on request.
Quality management runs under ISO 9001:2015, from inward coil inspection through slitting to final dispatch.
Our ISO 14001:2015 certification covers environmental management across storage, processing, and material movement.
ISO 45001:2018 governs occupational health and safety through our warehouse and slitting operations.
Stainless steel shims slit from narrow strip fall under HS heading 7220, covering flat-rolled stainless products under 600 mm wide. Material 600 mm or wider classifies under heading 7219. Your customs broker should confirm the final subheading.
Yes. We slit SS shim stock from 0.03 mm to 5 mm thick and any width from 3 mm to 2000 mm, with width tolerance held at ±0.1 mm.
Riddhi Siddhi Impex manufactures and supplies stainless steel shims from Mumbai and has served buyers across India and overseas since 2002. Call or WhatsApp our team, and you'll have a quote within 24 hours.
