5305-01-198-8555, SCREW,CLOSE TOLERANCE

4420-01-198-8557 TUBE SHEET,FLUID COOLER,INDUSTRI

National Stock Number:
5305-01-198-8555

Federal Supply Class:
5305

National Item Identification Number:
011988555

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:

1067066T-5-20	80539	SPS TECHNOLOGIES, LLC
GB510CE5-20	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION
HR204-5-20	73197	HI-SHEAR CORPORATION
HR204-5-20	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC
PBF1202-5-20	27624	SPS TECHNOLOGIES LLC
SC1779-5-20	06950	HOWMET GLOBAL FASTENING SYSTEMS INC

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	1.714 INCHES MINIMUM AND 1.761 INCHES MAXIMUM
GRIP DIAMETER	0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
GRIP LENGTH	1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM
HARDNESS RATING	46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.578 INCHES MINIMUM AND 0.634 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)
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	0.312 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
SPECIAL FEATURES	INTERNAL DRIVE RIBBED
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	NAS 672 ASSN STD 1ST TREATMENT RESPONSE OR MIL-C-8837,TY 2 CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OR CADMIUM AND CHROMATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.454 INCHES MINIMUM AND 0.521 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	24

Click here to Register for Free 30-day Trial