Product Details | FLAT WASHER

5310-01-642-1913 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: NAS1149EN232P , 5310-01-642-1913, 01-642-1913, 5310016421913, 016421913

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 2015048 01-642-1913

Demand History | NSN 5310-01-642-1913

Part Number Request Date QTY Origin
NAS1149EN232P 2025-10-301 250 US
NAS1149EN232P 2016-01-29 547 MY
NAS1149EN232P 2016-01-29 547 MY

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Technical Data | NSN 5310-01-642-1913

Characteristic Specifications
MATERIAL IRON ALLOY 660 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION A286 PER AMS5525 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT CADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION AMS-QQ-P-416,TY II,CL 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL
HOLE DIAMETER 0.089 INCHES MINIMUM AND
PERIPHERAL SHAPE STYLE ROUND
OVERALL DIAMETER 0.245 INCHES MINIMUM AND
CENTER HOLE SHAPE STYLE ROUND
CROSS-SECTIONAL SHAPE STYLE RECTANGULAR
THICKNESS 0.032 INCHES NOMINAL
SURFACE FINISH 125.0 MICROINCHES ALL SURFACES
SPECIAL FEATURES MATERIAL TO BE HEAT TREATED TO 160 KSI MIN UTS
SPECIFICATION/STANDARD DATA 80205-NAS1149 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
III PART NAME ASSIGNED BY CONTROLLING AGENCY WASHER,FLAT

Restrictions/Controls & Freight Information | NSN 5310-01-642-1913

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.
Electro-static Discharge Susceptible:ANo known Electrostatic Discharge (ESD) or Electromagnetic Interference (EMI) sensitivity
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
No Freight Information