Product Details | RECESSED WASHER

5310-00-891-8401 A washer of any peripheral shape having a centrally located hole. Both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. The thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. The maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. Excludes WASHER, CONCAVE, RETAINER, PACKING, and thrust type washers. See also SPACER, SLEEVE; and SPACER, STEPPED.

Part Alternates: 1400072520C4, 140-007-25-20C4, 5310-00-891-8401, 00-891-8401, 5310008918401, 008918401

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 25 JAN 1967 00-891-8401

Drawings & Photos | NSN 5310-00-891-8401


Cross Reference | NSN 5310-00-891-8401

Part Number Cage Code Manufacturer
140-007-25-20C4 97499 BELL HELICOPTER TEXTRON INC.

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Technical Data | NSN 5310-00-891-8401

Characteristic Specifications
MATERIAL STEEL COMP H11 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION AMS 6485 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT CADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATOR 28 RECESSED BOTH SIDES
HOLE DIAMETER 0.391 INCHES NOMINAL
OUTSIDE DIAMETER 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
MATERIAL THICKNESS 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM
TOP RECESS DIAMETER 0.461 INCHES NOMINAL
BOTTOM RECESS DIAMETER 0.471 INCHES NOMINAL
BOTTOM RECESS ANGLE 90.5 DEGREES NOMINAL
TOP RECESS ANGLE 89.5 DEGREES NOMINAL
SURFACE FINISH 63.0 MICROINCHES ALL SURFACES
III MINIMUM TENSILE STRENGTH 240000 POUNDS PER SQUARE INCH
MANUFACTURERS CODE 97499
DESIGN CONTROL REFERENCE 140-007-25-20C4

Restrictions/Controls & Freight Information | NSN 5310-00-891-8401

Category Code Description
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.
Category Code Description
NMF Description 194160 WASHER OR GASKETS, IRON OR STEEL,
Less than car load rating
Less than truck load rating U 50.0
Water commodity Code 713 unknown
Originating Activity Code CT U.S. Army Aviation and Missile Command (AIR)
Redstone Arsenal, AL 35898-5230
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

Management | NSN 5310-00-891-8401

Category Code Description
Cognizance Codes9ZNavy-owned stocks of defense industrial material
Naval Inventory Control Point, Mechanicsburg
Source of SupplyS9IDefense Industrial Supply Center
Philadelphia, PA 19111
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesVTERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
M
EA : Each