The V75MD321 is an AS568-321 blue Viton® (FKM) 75 Shore A O-Ring supplied with an inside diameter of 1.162 in (29.51 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.582 in (40.18 mm). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
The material holds up against engine and transmission fluids, aromatic hydrocarbons, and many acids. That behavior comes from the compound itself: Viton® (FKM) offers outstanding high-temperature capability and very low compression set at elevated temperature. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service.
The compound meets FDA requirements for food contact, carries NSF listing, and is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across oil and gas, aerospace, and semiconductor equipment.
Stocked as V75MD321 and sold individually. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description -321 BLUE FKM 75D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 1.162 inch (29.51 mm)
Actual Outside Diameter 1.582 inch (40.18 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable