Product Details | FLAT WASHER

5310-01-521-3921 A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items.

Part Alternates: SS5072, SS5072R5H, SS5072-R5H, 5310-01-521-3921, 01-521-3921, 5310015213921, 015213921

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 21 JUN 2004 01-521-3921

Drawings & Photos | NSN 5310-01-521-3921


Demand History | NSN 5310-01-521-3921

Part Number Request Date QTY Origin
SS5072R5H 2024-03-80 500 United States
5310-01-521-3921 2020-10-295 1278 DIBBS
5310-01-521-3921 2019-06-170 300 DIBBS
5310-01-521-3921 2019-03-80 349 DIBBS
5310-01-521-3921 2018-06-156 376 DIBBS
5310-01-521-3921 2017-11-324 248 DIBBS
SS5072R5H 2017-11-311 650 US
5310-01-521-3921 2017-05-134 205 DIBBS
5310-01-521-3921 2017-01-16 100 DIBBS
5310-01-521-3921 2016-11-307 108 DIBBS
5310-01-521-3921 2015-07-182 26 DIBBS
5310-01-521-3921 2011-03-88 1 DIBBS
5310-01-521-3921 2010-10-280 1 DIBBS
5310-01-521-3921 2010-09-256 800 United States
SS5072 2010-09-256 800 United States

Cross Reference | NSN 5310-01-521-3921

Part Number Cage Code Manufacturer
SS5072 78286 SIKORSKY AIRCRAFT CORPORATION
SS5072-R5H 78286 SIKORSKY AIRCRAFT CORPORATION

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Technical Data | NSN 5310-01-521-3921

Characteristic Specifications
MATERIAL STEEL CORROSION RESISTING OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION SAE-AMS5513 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION SAE-AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HOLE DIAMETER 0.178 INCHES MINIMUM AND 0.180 INCHES MAXIMUM
PERIPHERAL SHAPE STYLE 1 ROUND
OVERALL DIAMETER 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM
CENTER HOLE SHAPE STYLE 1 ROUND
CROSS-SECTIONAL SHAPE STYLE 1 RECTANGULAR
THICKNESS 0.032 INCHES NOMINAL
III END ITEM IDENTIFICATION NEW MAN-60

Restrictions/Controls & Freight Information | NSN 5310-01-521-3921

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:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Automatic Data Processing Equipment:0Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)
Category Code Description
NMF Description 093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3)
Less than car load rating
Less than truck load rating W Rating Variable
Water commodity Code 576 unknown
Originating Activity Code KZ Defense Supply Center Philadelphia
Philadelphia, PA 19101
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 5310-01-521-3921

Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each