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|MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M , 96906||MS21250H20028|
|THREAD LENGTH||1.770 INCHES MINIMUM AND 1.790 INCHES MAXIMUM|
|FASTENER LENGTH||3.530 INCHES NOMINAL|
|HEAD STYLE||DOUBLE HEXAGON W/HOLE|
|HEAD HEIGHT||1.155 INCHES NOMINAL|
|WIDTH BETWEEN FLATS||1.301 INCHES MINIMUM AND 1.314 INCHES MAXIMUM|
|EXTENDED WASHER DIAMETER||2.115 INCHES MINIMUM AND 2.125 INCHES MAXIMUM|
|EXTENDED WASHER THICKNESS||0.269 INCHES NOMINAL|
|HOLE DIAMETER||0.055 INCHES NOMINAL|
|Agency Usage||End Item Usage||Criticality|
A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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. A locking feature may be incorporated in the design of the head or threads. See BOLT, MACHINE and BOLT, CLEVIS.
MS21250H20028 96906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS
Restrictions/Controls & Freight Information
Shelf-Life Code:0Nondeteriorative 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. Controlled Inventory Item Code:UUNCLASSIFIED 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.
Cognizance Codes9BNavy-owned stocks of DLA materialNaval Inventory Control Point, MechanicsburgSource of SupplySMSDefense Logistics AgencyEnterprise Business SystemsAgencyDNDepartment of the NavyService OrganizationNU.S. NavyAcquisition Advice CodesDDoD INTEGRATED MATERIEL-MANAGED, STOCKED, AND ISSUED # Issue, transfer, or shipment is not subject to specialized controls other than those imposed by the Integrated Materiel Manager/Service supply policy. 1. The item is centrally managed, stocked, and issued. 2. Requisitions must contain the fund citation required to acquire the item. Requisitions will be submitted in accordance with Integrated Materiel Manager(IMM)/Service requisitioning procedures. Controlled Item CodeUUNCLASSIFIEDShelf Life Code0NondeteriorativePurchasingQTY UOM1 EA : Each
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