For base sheet attachment to higher density, lightweight insulating concrete, NVS concrete, and various gypsum roofdecks. Fastener: Precision formed from polymer coated steel to prevent corrosion. Rectangular dual gripping legs, 1.2" long.Disk: Precision formed from coated steel to prevent corrosion. Integrally locked to fastener. Rib reinforced cap, 2.7" diameter.
Approvals: FM-75 fasteners maintain Factory Mutual, Underwriters Lab , and Miami-Dade County approvals. Fastening Pattern: Consult Factory Mutual, Underwriters Lab or Miami-Dade requirements for recommended pattern in normal exposed, and hurricane areas. Field Testing: On-site withdrawal testing should always be performed to evaluate the ability of the roofing substrate to satisfactorily accept and retain fasteners. Such testing may alter fastener selection and modify applicable fastening patterns.
Equipment: Always use the Magnetic Driver to assure proper fastener installation.