5305-01-528-2705, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-528-2705

Federal Supply Class:
5305

National Item Identification Number:
015282705

Description:
SCREW,CLOSE TOLERANCE

Detail:
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 (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 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.

Manufacturer Information:

HT239-4-9	73197	HI-SHEAR CORPORATION
HT239-4-9	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.200 INCHES NOMINAL OVERALL
FASTENER LENGTH	0.300 INCHES MINIMUM AND 0.347 INCHES MAXIMUM
GRIP DIAMETER	0.250 INCHES NOMINAL
GRIP LENGTH	0.300 INCHES MINIMUM AND 0.347 INCHES MAXIMUM
HEAD DIAMETER	0.363 INCHES MINIMUM AND 0.394 INCHES MAXIMUM
HEAD HEIGHT	0.237 INCHES MINIMUM AND 0.284 INCHES MAXIMUM
HEAD STYLE	FLUSH
HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM
HOLE CONFIGURATION STYLE	ROUND
HOLE QUANTITY	1
HOLE TYPE	DRILLED
INTERNAL DRIVE STYLE	HIGH-TORQUE
PART NAME ASSIGNED BY CONTROLLING AGENCY	HI-TORQUE BOLT
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.190 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM LOCKING FEATURE
SPECIAL FEATURES	ONE HUNDRED DEGREE FLUSH REDUCED HEAD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL
THREAD LENGTH	0.190 INCHES NOMINAL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	32

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