Product Details | DOUBLE HEXAGON EXTENDED WASHER SELF-LOCKING NUT

5310-00-556-6821 A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part Alternates: NSA50503, NSA5050-3, BACN10FZ3, BACN10HY3M, HW197023, HW19702-3, HW29872, JA1N048S253AA, LH609402, LH6094-02, MILR945, MILR94-5 , RMLH9073, RV4NAYSD253C, TLN10003, TLN1000-3, TLN1001W3, 16137, 55342-1032, 69233SBD, 5310-00-556-6821, 00-556-6821, 5310005566821, 005566821, 553421032

Hardware and Abrasives | Nuts and Washers

Supply Group (FSG) NSN Assign. NIIN
53 08 NOV 1974 00-556-6821

Drawings & Photos | NSN 5310-00-556-6821


Demand History | NSN 5310-00-556-6821

Part Number Request Date QTY Origin
BACN10HY3M 2025-07-212 150 United States
5310-00-556-6821 2020-10-285 24 United States
NSA50503 2020-07-190 550 CN
TLN10003 2016-01-29 2 Thailand
5310-00-556-6821 2013-10-302 5991 DIBBS
5310-00-556-6821 2013-10-287 5991 DIBBS
NSA50503 2013-02-35 41364 US
MILR945 2012-04-114 1 US
5310-00-556-6821 2012-01-13 60 United States

Cross Reference | NSN 5310-00-556-6821

Part Number Cage Code Manufacturer
55342-1032 56878 SPS TECHNOLOGIES, LLC DBA AEROSPACE DIVISION
69233SBD 56878 SPS TECHNOLOGIES, LLC DBA AEROSPACE DIVISION
BACN10FZ3 81205 THE BOEING COMPANY DBA BOEING
BACN10FZ3 82918 THE BOEING COMPANY DBA BOEING
BACN10HY3M 81205 THE BOEING COMPANY DBA BOEING
HW19702-3 15653 ALCOA GLOBAL FASTENERS, INC.
HW29872 15653 ALCOA GLOBAL FASTENERS, INC.
LH6094-02 019L2 MACLEAN-FOGG COMPANY DBA MAC LEAN-ESNA
NSA5050-3 F0224 ALCOA FIXATIONS SIMMONDS SAS
NSA5050-3 F1303 PATURLE ACIERS
RMLH9073 019L2 MACLEAN-FOGG COMPANY DBA MAC LEAN-ESNA
RMLH9073 72962 HARVARD INDUSTRIES INC
TLN1000-3 17446 HUCK INTERNATIONAL, INC. DBA ALCOA FASTENING SYSTEMS
TLN1000-3 27624 SPS TECHNOLOGIES, LLC DBA PB FASTENERS
TLN1000-3 56878 SPS TECHNOLOGIES, LLC DBA AEROSPACE DIVISION
TLN1000-3 92215 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS
TLN1001W3 92215 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS

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Technical Data | NSN 5310-00-556-6821

Characteristic Specifications
THREAD SERIES UNJF
NOMINAL THREAD SIZE 0.190 INCHES
THREAD QUANTITY PER INCH 32
THREAD CLASS 3B
THREAD DIRECTION RIGHT-HAND
MATERIAL STEEL COMP 1040 OR STEEL COMP 1042 OR STEEL COMP 1050 NUT STEEL COMP 8740 WASHER
MATERIAL DOCUMENT AND CLASSIFICATION AISI1040 ASSN STD 1ST MATERIAL RESPONSE OR AISI1042 ASSN STD 2ND MATERIAL RESPONSE OR AISI1050 ASSN STD 3RD MATERIAL RESPONSE NUT AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-S-6049 COMP 8740 MIL SPEC SINGLE MATERIAL RESPONSE WASHER
SURFACE TREATMENT CADMIUM NUT CADMIUM WASHER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE NUT QQ-P-416 TYPE2,CLASS3 FED SPEC SINGLE TREATMENT RESPONSE WASHER
HARDNESS RATING 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
NUT STYLE A293 DOUBLE HEXAGON
WASHER OUTSIDE DIAMETER 0.380 INCHES MAXIMUM
OVERALL HEIGHT 0.223 INCHES MINIMUM AND 0.243 INCHES MAXIMUM
WASHER THICKNESS 0.072 INCHES MINIMUM AND 0.087 INCHES MAXIMUM
WIDTH ACROSS FLATS 0.213 INCHES MINIMUM AND 0.221 INCHES MAXIMUM
LOCKING FEATURE PREVAILING TORQUE ALL METAL DESIGN
NUT COUNTERBORE DEPTH 0.072 INCHES MINIMUM AND 0.087 INCHES MAXIMUM NUT
COUNTERBORE DIAMETER 0.211 INCHES MINIMUM AND 0.221 INCHES MAXIMUM NUT
LUBRICATION DRY FILM LUBRICANT
TEMP RATING 450.0 DEG FAHRENHEIT NOMINAL

Restrictions/Controls & Freight Information | NSN 5310-00-556-6821

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 062960 REOSTATS/PARTS NOI
Less than car load rating
Less than truck load rating P 77.5
Water commodity Code 72D unknown
Originating Activity Code XX
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity H Signal Corps supplies and equipment, including radio equipment and supplies, communications equipment and supplies, electrical equipment and supplies, etc.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo 3 Electrostatic Sensitive Device (ESD), subject to damage caused by electrostatic discharge. (See DoD 4500.32-R, Volume 1, Appendix A, Section I for additional information on ESD devices).

Management | NSN 5310-00-556-6821

Category Code Description
Materiel Category and Inventory ManagerQ Electronics Materiel (DLA/GSA Items)
Appropriation and Budget Activity2 Stock Fund Secondary Items
Management Inventory Segment2 NONREPARABLE ITEMS (Exclusive of Insurance and Provisioning Items). This code will be used to identify items which are not reparable.
Specific Group/Generic Code0 Medical Materiel
Weapons Systems/End Item or Homogeneous Group00DLA/GSA-Managed Items that cannot be identified to a specific Army Weapons Systems/End Item
Accounting Requirements CodeX Expendable item. An item of Army property coded with an ARC of ?X? in the AMDF. Expendable items require no formal accountability after issue from a stock record account. Commercial and fabricated items similar to items coded ?X? in the AMDF are considered expendable items.
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDADepartment of the Army
Service OrganizationAU.S. Army
ReparabilityAItem requires special handling or condemnation procedures for specific reasons, such as precious metal content, high dollar value, critical material, or hazardous materiel. Refer to appropriate manuals or directives for specific instructions.
Acquisition Advice CodesJNOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each
Category Code Description
Budget Code9 General Support DIV57X4921.070:Air Force decentrally managed expense items (ERRC XB3, XF-3) with a unit cost of less than $250,000 that are requisitioned/procured at base (retail) level from DLA, GSA, Army, Navy, Depot Maintenance Service, Air Force Industrial Fund (AFMC), local manufacture and commercial vendors.
Materiel Management Aggregation CodeEHSX:ELECTRONIC COMPONENTS
Price ValidationN The current standard price in Catalog Management Data (CMD) has not analyzed or coded for LP/LM.
  • The price has not been analyzed or reviewed for accuracy.
  • ZOP or Standard price challenges are permissible, but must be supported with adequate justification. However, if coded for Local Purchase (LP) or Fabrication/Manufacture as indicated with an (LM) Acquisition Advice Code of ?L? or?F?,the case must be evaluated locally where purchased or fabricated.
Fund CodeSFStock fund applicable to items managed for the Air Force by the respective Inventory Control Point.
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDFDepartment of the Air Force
Service OrganizationFU.S. Air Force
ReparabilityNStock Fund (except Munitions)
Acquisition Advice CodesJNOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each
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 CodesJNOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each