Product Details | THUMBSCREW

5305-00-531-9739 An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use SCREW (as modified) or BOLT (as modified).

Part Alternates: BYRF509, 5305-00-531-9739, 00-531-9739, 5305005319739, 005319739

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 01 JAN 1963 00-531-9739

Drawings & Photos | NSN 5305-00-531-9739


Cross Reference | NSN 5305-00-531-9739

Part Number Cage Code Manufacturer
BYRF509 05624 GE AVIATION SYSTEMS LLC DBA GE AVIATION

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Technical Data | NSN 5305-00-531-9739

Characteristic Specifications
THREAD SERIES DESIGNATOR UNC
NOMINAL THREAD DIAMETER 0.250 INCHES
THREAD QUANTITY PER INCH 20
THREAD CLASS 2A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 1.250 INCHES MAXIMUM
FASTENER LENGTH 1.250 INCHES NOMINAL
MATERIAL STEEL OVERALL
SURFACE TREATMENT CADMIUM OVERALL
HEAD STYLE C77 THUMB NO. 1
HEAD HEIGHT 0.562 INCHES NOMINAL
WIDTH BETWEEN FLATS 0.844 INCHES NOMINAL
HOLE CONFIGURATION STYLE E10 ROUND CHORD
POINT STYLE F19 FLAT
MANUFACTURERS CODE 05624
DESIGN CONTROL REFERENCE BYRF509

Restrictions/Controls & Freight Information | NSN 5305-00-531-9739

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
NMF Description 093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3)
Less than car load rating U 50
Less than truck load rating W Rating Variable
Water commodity Code 713 unknown
Originating Activity Code XX
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity B Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable