Product Details | CLOSE TOLERANCE SCREW

5305-01-018-8928 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.

Part Alternates: HT4036428, HT4036-4-28, ST3M680428, ST3M680-4-28, 5305-01-018-8928, 01-018-8928, 5305010188928, 010188928

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 01 APR 1976 01-018-8928

Drawings & Photos | NSN 5305-01-018-8928


Cross Reference | NSN 5305-01-018-8928

Part Number Cage Code Manufacturer
HT4036-4-28 17446 HUCK INTERNATIONAL, INC. DBA ALCOA FASTENING SYSTEMS
HT4036-4-28 56878 SPS TECHNOLOGIES, LLC DBA AEROSPACE DIVISION
HT4036-4-28 73197 HI-SHEAR CORPORATION
HT4036-4-28 80539 SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP
HT4036-4-28 92215 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS
HT4036-4-28 97928 HUCK INTL INC
HT4036-4-28 C4293 ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH
HT4036-4-28 L4528 LISI AEROSPACE CANADA CORP
HT4036-4-28 R1120 SATAIR A/S
ST3M680-4-28 76301 BOEING COMPANY, THE DBA BOEING

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Technical Data | NSN 5305-01-018-8928

Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER 0.250 INCHES
THREAD QUANTITY PER INCH 28
THREAD CLASS 3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 0.397 INCHES NOMINAL
FASTENER LENGTH 2.132 INCHES MINIMUM AND 2.162 INCHES MAXIMUM
MATERIAL STEEL CORROSION RESISTING OVERALL
SURFACE TREATMENT PASSIVATE OVERALL
HEAD STYLE C50 FLAT COUNTERSUNK
HEAD DIAMETER 0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
INTERNAL DRIVE STYLE D9 HIGH-TORQUE
GRIP LENGTH 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM
GRIP DIAMETER 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
MANUFACTURERS CODE 76301
MFR SOURCE CONTROLLING REFERENCE ST3M680-4-28

Restrictions/Controls & Freight Information | NSN 5305-01-018-8928

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information