SCREW,CLOSE TOLERAN,
FOSTER A P CO | 80200 |
NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | 80205 |
FOSTER TRANSFORMER COMPANY | 81160 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.363 INCHES NOMINAL |
FASTENER LENGTH | 0.973 INCHES MINIMUM AND 1.003 INCHES MAXIMUM |
HEAD STYLE | FLAT COUNTERSUNK |
HEAD DIAMETER | 0.339 INCHES MINIMUM AND 0.381 INCHES MAXIMUM |
GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM |
SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES MINIMUM FIRST HOLE AND 0.080 INCHES MAXIMUM FIRST HOLE |
INTERNAL DRIVE STYLE | TORQUE-SET RIBBED |
NOMINAL THREAD DIAMETER | 0.190 INCHES |
GRIP LENGTH | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
THREAD QUANTITY PER INCH | 32 |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.862 INCHES MINIMUM FIRST HOLE AND 0.882 INCHES MAXIMUM FIRST HOLE |
MATERIAL | IRON ALLOY 660 OVERALL |
THREAD SERIES DESIGNATOR | UNJF |
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth ( . 1 IN.) ( . 25 mm) or less of a specific diameter for items (1. IN.) (25 mm) or less in diameter. Items over (1. IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths ( . 15 IN.) ( . 38 mm) or less. The nominal major diameter of the threads shall be at least one thousandth ( . 1 IN.) ( . 25 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. |