ARCONIC GLOBAL FASTENERS & RINGS, INC. | 29372 |
BOEING COMPANY, THE | 43999 |
FASTENER INNOVATION TECHNOLOGY, INC. | 58998 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.515 INCHES MINIMUM AND 0.555 INCHES MAXIMUM |
FASTENER LENGTH | 1.463 INCHES MINIMUM AND 1.483 INCHES MAXIMUM |
HEAD STYLE | FLAT COUNTERSUNK |
HEAD DIAMETER | 0.508 INCHES MAXIMUM |
GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
INTERNAL DRIVE STYLE | HEXAGON |
NOMINAL THREAD DIAMETER | 0.250 INCHES |
GRIP LENGTH | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM |
WIDTH ACROSS FLATS | 0.1565 INCHES MINIMUM AND 0.1587 INCHES MAXIMUM |
THREAD QUANTITY PER INCH | 28 |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
SURFACE FINISH | 32.0 MICROINCHES GRIP |
SURFACE FINISH | 32.0 MICROINCHES THREADS |
SPECIAL FEATURES | 3 KEYWAYS 1.317 IN. MIN. AND 1.347 IN. MAX LONG,0.040 IN. MIN AND 0.044 IN. MAX WIDE MACHINED IN SHANK,BORE MACHINED IN THREAD END TO RECEIVE PLUG |
MATERIAL | IRON ALLOY 660 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
SURFACE TREATMENT | PASSIVATE OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE 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. |