5305-01-043-1879, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-043-1879

Federal Supply Class:
5305

National Item Identification Number:
010431879

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:

BM19045-3-11A	17446	HUCK INTERNATIONAL, INC
BM19045-3-11A	97928	HUCK INTL INC
GB510N3A11	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION
HT326-3A11	73197	HI-SHEAR CORPORATION
HT8181F3-11	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
HT326-3A11	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC
SFH22D3A11	56878	SPS TECHNOLOGIES, LLC
SFH22D3A11	80539	SPS TECHNOLOGIES, LLC

Techincal Specification:

COUNTERSINK ANGLE	100.0 DEGREES NOMINAL
FASTENER LENGTH	0.908 INCHES MINIMUM AND 0.955 INCHES MAXIMUM
GRIP DIAMETER	0.1885 INCHES MINIMUM AND 0.1894 INCHES MAXIMUM
GRIP LENGTH	0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM
HARDNESS RATING	46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.325 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP H11 OVERALL
MINIMUM TENSILE STRENGTH	220000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.190 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
SPECIFICATION/STANDARD DATA	26512-GB510N MANUFACTURERS STANDARD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	NAS 672 ASSN STD 1ST TREATMENT RESPONSE OR MIL-C-8837 TY 2 CL 2 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OR CADMIUM AND CHROMATE OVERALL
THREAD LENGTH	0.211 INCHES MINIMUM AND 0.278 INCHES MAXIMUM
THREAD CLASS	3
THREAD DIRECTION	RIGHT-HAND
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)

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