PartsTable TECHNICAL DATA SHEET
OCTOBER 2026Technical Data Sheet

MS21044N5Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-088-0553 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-088-0553 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-088-0553. Primary manufacturer part number: MS21044N5.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Nut Style: HEXAGON
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)
  • Nominal Thread Size: 0.312 INCHES IN
  • Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
  • Surface Treatment: CADMIUM AND CHROMATE NUT
  • Bearing Surface Finish: 125.0 MICROINCHES
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1006 or Steel Comp 1008 or Steel Comp 1009 or Steel Comp 1010 or Steel Comp 1015 or Steel Comp 1018 or Steel Comp 1035 or Steel Comp 11l37 or Steel Comp 1213 or Steel Comp 12l14 Nut construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-088-0553, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System. This item has 26 commercial cross-references from 23 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the government interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-088-0553
Primary Part NumberMS21044N5
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Nut StyleHEXAGON
Bearing Surface TypeCHAMFERED OR WASHER FACED
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Nominal Thread Size0.312 INCHES IN
Width Across Flats0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
Surface TreatmentCADMIUM AND CHROMATE NUT
Bearing Surface Finish125.0 MICROINCHES
LubricationSOLUBLE LUBRICANT
Thread Quantity Per Inch24
Temp Rating250.0 FAHRENHEIT NOMINAL DEGF
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
Thread Class3B
Thread DirectionRIGHT-HAND
Countersink Angle88.0 DEGREES NOMINAL NUT
Nut Height0.271 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
MaterialSTEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1035 OR STEEL COMP 11L37 OR STEEL COMP 1213 OR STEEL COMP 12L14 NUT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
⇄ Verified Substitutes 8
5985-00-069-3782 INTERCHANGEABLE
Antenna Element
3040-00-213-602855242 INTERCHANGEABLE
Gearshaft,spur
Cae Usa Inc.
5962-00-222-474255242 INTERCHANGEABLE
Microcircuit,digital
Hamilton Sundstrand Corporation
5330-00-579-95801666195 INTERCHANGEABLE
Gasket
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
1270-00-705-007155242 INTERCHANGEABLE
Line,radio Frequenc
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5995-01-114-5703 INTERCHANGEABLE
Cable Assembly,special Purpose,e
8145-01-512-090555242 INTERCHANGEABLE
Support,shipping and Storage Con
Sharkcage Inc.
4810-01-587-350719-0139 INTERCHANGEABLE
Valve,solenoid
Parker Hannifin Corporation Div Village Marine Tech
Cross-Reference Index
Part NumberManufacturer
10116548 Nimikkeistokeskus Ncb Finland (FIN)
2211675 Embraer S.a. (BRA)
853674-00 Defense Reduction Agency (USA)
190139 Allison Transmission Inc Dba Allison Transmission, Inc (USA)
BM11359-07 Demarkus Corp Refrigeration Engineering Corp (USA)
908999K1 Airmotive Carburetor (USA)
SG4013SYMB0LJ Zf Industrieantriebe Witten Gmbh (DEU)
H0698 Kratos Unmanned Aerial Systems, Inc Div Unmanned Systems Division (USA)
5310000880553 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
8805718 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament (USA)
190139 General Motors Corp (USA)
2211675 Embraer Empresa Brasileira De Aeronautica Sa (BRA)
908999K1 Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA)
2211675 Embraer Aviation International (FRA)
MS21044N5 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
870126 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament (USA)
MS21044N5 Leonardo Spa Helicopters Division - Production Site (ITA)
MS21044N5 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
4-00560-005 Arma Div Ambac Industries Inc
F52NE054 Abbott-Interfast Corp. (USA)
Related Parts
5985-00-069-3782INTERCHANGEABLE
ANTENNA ELEMENT
3040-00-213-6028INTERCHANGEABLE
GEARSHAFT,SPUR
55242
5962-00-222-4742INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
55242
5330-00-579-9580INTERCHANGEABLE
GASKET
1666195
1270-00-705-0071INTERCHANGEABLE
LINE,RADIO FREQUENC
55242
5995-01-114-5703INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
8145-01-512-0905INTERCHANGEABLE
SUPPORT,SHIPPING AND STORAGE CON
55242
4810-01-587-3507INTERCHANGEABLE
VALVE,SOLENOID
19-0139

Frequently Asked Questions

What is NSN 5310-00-088-0553?

NSN 5310-00-088-0553 is a Nut,self-Locking,hexagon, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-088-0553?

NSN 5310-00-088-0553 has 26 cross-referenced part numbers: 10116548 (Nimikkeistokeskus Ncb Finland), 2211675 (Embraer S.a.), 853674-00 (Defense Reduction Agency), 190139 (Allison Transmission Inc Dba Allison Transmission, Inc), BM11359-07 (Demarkus Corp Refrigeration Engineering Corp) and 21 more.

What NSN replaces 5310-00-088-0553?

There are 8 known substitutes for 5310-00-088-0553: 5985-00-069-3782, 3040-00-213-6028, 5962-00-222-4742 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21044N5?

Key specifications for MS21044N5: Nut Style: HEXAGON; Bearing Surface Type: CHAMFERED OR WASHER FACED; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Nominal Thread Size: 0.312 INCHES IN. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-088-0553 still in active supply?

NSN 5310-00-088-0553 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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