This appendix provides general torque data to allow you to determine the torque requirements for a filter-separator, liquid
fuel fastener if a specific value is not listed in the text. Specific values are provided for the most critical requirements.
Most threaded fasteners are covered by specifications that define mechanical properties such as tensile strength, yield
strength, proof load and hardness. These specifications are carefully considered in initial selection of fasteners for a
given application. To assure continued satisfactory performance, replacement fasteners should be of the correct strength,
nominal diameter, thread pitch, length and finish.
Most original equipment fasteners (English or metric) are identified with markings or numbers indicating the strength of the
fastener. These markings are identified in the paragraphs that follow. Attention to these markings is important in assuring
that the proper replacement fasteners are used.
H-2 FILTER-SEPARATOR, LIQUID FUEL SPECIFIC TORQUE DATA.
Filter-Separator, Liquid Fuel Specific Torque Data
Filter-Separator, Liquid Fuel End Cap Bolts
30 ft. lbs
Sight Gauge Mounting Screws
45 in. lbs
H-3 GENERAL TORQUE DATA.
BOLT STRENGTH IDENTIFICATION, ENGLISH SYSTEM
Identification marks correspond to bolt strength - increasing number of slashes represent increasing strength.