Product Details | FLAT WASHER

5310-01-488-4995 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: MS514129A, MS51412-9A, 6510E71FN67, 5310-01-488-4995, 01-488-4995, 5310014884995, 014884995

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 27 AUG 2001 01-488-4995

Drawings & Photos | NSN 5310-01-488-4995


Demand History | NSN 5310-01-488-4995

Part Number Request Date QTY Origin
5310-01-488-4995 2025-11-329 1294 DIBBS
5310-01-488-4995 2025-07-198 267 DIBBS
5310-01-488-4995 2025-07-190 267 DIBBS
5310-01-488-4995 2024-10-275 254 DIBBS
5310-01-488-4995 2022-04-104 284 DIBBS
5310-01-488-4995 2022-04-93 284 DIBBS
5310-01-488-4995 2021-08-236 500 United States
5310-01-488-4995 2020-07-197 90 United States
5310-01-488-4995 2019-10-303 588 DIBBS
5310-01-488-4995 2019-07-202 299 DIBBS
5310-01-488-4995 2019-03-88 338 DIBBS
5310-01-488-4995 2019-03-80 338 DIBBS
5310-01-488-4995 2016-07-213 398 DIBBS
5310-01-488-4995 2016-07-207 597 DIBBS
5310-01-488-4995 2014-01-29 202 DIBBS
5310-01-488-4995 2012-01-24 122 DIBBS
5310-01-488-4995 2009-05-142 124 DIBBS
5310-01-488-4995 2009-04-97 124 DIBBS
5310-01-488-4995 2009-03-76 124 DIBBS
5310-01-488-4995 2009-02-54 124 DIBBS
5310-01-488-4995 2009-02-33 124 DIBBS
5310-01-488-4995 2008-04-121 124 DIBBS

Cross Reference | NSN 5310-01-488-4995

Part Number Cage Code Manufacturer
6510E71FN67 90099 NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN MARINE SYSTEMS
MS51412-9A 96906 MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS

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Technical Data | NSN 5310-01-488-4995

Characteristic Specifications
MATERIAL STEEL COMP 4130 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION ASTMA331,GRADE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT ZINC AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION ASTMB633,TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
HOLE DIAMETER 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM
PERIPHERAL SHAPE STYLE 1 ROUND
OVERALL DIAMETER 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM
CENTER HOLE SHAPE STYLE 1 ROUND
CROSS-SECTIONAL SHAPE STYLE 1 RECTANGULAR
THICKNESS 0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM
SURFACE FINISH 125.0 MICROINCHES ALL SURFACES
III END ITEM IDENTIFICATION NUCLEAR REACTOR BOUNDRY AREA, HARDWARE
MANUFACTURERS CODE 96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE MS51412-9A

Restrictions/Controls & Freight Information | NSN 5310-01-488-4995

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.
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 573 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 5310-01-488-4995

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