5305-01-086-9288, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-086-9288

Federal Supply Class:
5305

National Item Identification Number:
010869288

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:

BACB30AB-P4-9	06710	VALLEY-TODECO, INC.
BACB30AB-P4-9	06725	SPS TECHNOLOGIES, LLC
BACB30AB-P4-9	06950	HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30AB-P4-9	17943	FEDERAL MANUFACTURING CORP
BACB30AB-P4-9	27624	SPS TECHNOLOGIES LLC
BACB30AB-P4-9	56878	SPS TECHNOLOGIES, LLC
BACB30AB-P4-9	57928	SONIC INDUSTRIES, INC.
BACB30AB-P4-9	58845	ABOUNDING SECURITY INC DIV OF MAA CORP
BACB30AB-P4-9	59764	KENALOY PRODUCTS INC SUB MASCO CORP
BACB30AB-P4-9	73197	HI-SHEAR CORPORATION
BACB30AB-P4-9	80539	SPS TECHNOLOGIES, LLC
BACB30AB-P4-9	81205	THE BOEING COMPANY
BACB30AB-P4-9	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30AB-P4-9	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	0.922 INCHES MINIMUM AND 0.954 INCHES MAXIMUM
GRIP LENGTH	0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM
GRIP DIAMETER	0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
HEAD DIAMETER	0.4512 INCHES MINIMUM AND 0.5113 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
MATERIAL	STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4037 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIFICATION/STANDARD DATA	81205-BACB30AB MANUFACTURERS STANDARD
SURFACE FINISH	63.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD CLASS	3A
THREAD LENGTH	0.350 INCHES MINIMUM AND 0.402 INCHES MAXIMUM
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNF

Click here to Register for Free 30-day Trial