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National Stock Number:
5305-01-547-1638
Federal Supply Class:
5305
National Item Identification Number:
015471638
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.
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Manufacturer Information:
| HT4027-7-15 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4027-7-15 | 56878 | SPS TECHNOLOGIES, LLC | | HT4027-7-15 | 73197 | HI-SHEAR CORPORATION | | HT4027-7-15 | 80539 | SPS TECHNOLOGIES, LLC | | HT4027-7-15 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M557-7-15 | 06710 | VALLEY-TODECO, INC. | | ST3M557-7-15 | 06725 | SPS TECHNOLOGIES, LLC | | ST3M557-7-15 | 0K6Z0 | SATURN FASTENERS INC | | ST3M557-7-15 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M557-7-15 | 17446 | HUCK INTERNATIONAL, INC | | ST3M557-7-15 | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M557-7-15 | 27624 | SPS TECHNOLOGIES LLC | | ST3M557-7-15 | 4WL75 | CAMCAR LLC DIV CAMCAR LLC | | ST3M557-7-15 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M557-7-15 | 59563 | REID PRODUCTS INC. | | ST3M557-7-15 | 76301 | THE BOEING COMPANY | | ST3M557-7-15 | U6683 | LINREAD LTD DBA LINREAD NORTHBRIDGE | | WC4027-7-15 | 60516 | WEST COAST AEROSPACE, INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.546 INCHES NOMINAL | | GRIP DIAMETER | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM | | GRIP LENGTH | 0.938 INCHES NOMINAL | | HEAD DIAMETER | 0.612 INCHES MINIMUM AND 0.672 INCHES MAXIMUM | | HEAD HEIGHT | 0.101 INCHES NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | PART NAME ASSIGNED BY CONTROLLING AGENCY | DWG NAME: SCREW - CLOSE TOLERANCE, 100 DEGREE COUNTERSUNK, REDUCED HEAD, HI-TORQUE, NON-MAGNETIC CRES (125 KSI FSU) | | MATERIAL | NICKEL ALLOY 718 OVERALL | | NOMINAL THREAD DIAMETER | 0.4375 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.656 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNJF |
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