PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21044N04Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-088-0551 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-088-0551 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-088-0551. Primary manufacturer part number: MS21044N04.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE NUT
  • Material: STEEL NUT
  • Bearing Surface Finish: 125.0 MICROINCHES
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Nut Height: 0.133 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
  • Material: PLASTIC POLYAMIDE NYLON LOCKING INSERT
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Nut construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-088-0551, 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 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 40 commercial cross-references from 22 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-088-0551
Primary Part NumberMS21044N04
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
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE NUT
MaterialSTEEL NUT
Bearing Surface Finish125.0 MICROINCHES
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nut Height0.133 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
MaterialPLASTIC POLYAMIDE NYLON LOCKING INSERT
Countersink Angle88.0 DEGREES NOMINAL NUT
Width Across Flats0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
Temp Rating250.0 FAHRENHEIT NOMINAL DEGF
Nut StyleHEXAGON
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Counterbore Diameter0.116 INCHES MINIMUM AND 0.156 INCHES MAXIMUM NUT IN
Thread DirectionRIGHT-HAND
Surface TreatmentCADMIUM NUT
LubricationSOLUBLE LUBRICANT
Thread Class3B
Nominal Thread Size0.112 INCHES IN
Thread Quantity Per Inch40
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
5320-00-165-8810278-002-3032 INTERCHANGEABLE
Rivet,solid
Northrop Grumman Systems Corporation
5331-00-166-0980AS3209-012 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5310-00-660-3389NAS1021N04 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4730-00-794-8516190734 INTERCHANGEABLE
Plug,pipe
Woodward, Inc. Div Fuel Systems and Controls
5310-01-225-522922NM40 INTERCHANGEABLE
Nut,self-Locking,hexagon
Sps Technologies, Llc Dba PB Fasteners
5310-01-225-5230 INTERCHANGEABLE
Nut,self-Locking,hexagon
5999-01-302-07050878 INTERCHANGEABLE
Contact Assembly,electrical
Fischer George Foundry Systems Inc P O Box 1607 Seminole Ok 74818-1607
5998-01-599-012987012-1 INTERCHANGEABLE
Circuit Card Assembly
Applied Systems Engineering Inc
5999-01-728-0432190734 INTERCHANGEABLE
Contact,electrical
Angelus Corp, the Div the Angelus Corporation
Cross-Reference Index
Part NumberManufacturer
Z00.N5402337004 Daher Aerospace - Ex Socata (FRA)
MS20365-440 Zf Industrieantriebe Witten Gmbh (DEU)
69510-28 Zf Industrieantriebe Witten Gmbh (DEU)
1230122 Westinghouse Electric Corp (USA)
142200440 Elac Sonar Gmbh (DEU)
AN365-440A Zf Industrieantriebe Witten Gmbh (DEU)
AN365-440 Aeronautical Standards Group Dept of Navy and Air Force (USA)
190734 General Motors Corp (USA)
10116547 Nimikkeistokeskus Ncb Finland (FIN)
0878 Power Industries Inc (USA)
Z00.0114417 Daher Aerospace - Ex Socata (FRA)
525-628-90451 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
MS20470B3-3 Zf Industrieantriebe Witten Gmbh (DEU)
7024420P1 Zf Industrieantriebe Witten Gmbh (DEU)
5310PL0145345 Jednolity Indeks Materialowy - Uniform Material Index (POL)
422294-8 Honeywell International Inc. Dba Honeywell International Div Aerospace-Minneapolis (USA)
870121 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament (USA)
NASM25027 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
272 532 739 Vincorion Advanced Systems Gmbh Div Jenoptik Defense and Civil Systems (DEU)
5310PL1826710 Jednolity Indeks Materialowy - Uniform Material Index (POL)
Related Parts
5320-00-165-8810INTERCHANGEABLE
RIVET,SOLID
278-002-3032
5331-00-166-0980INTERCHANGEABLE
O-RING
AS3209-012
5310-00-660-3389INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
NAS1021N04
4730-00-794-8516INTERCHANGEABLE
PLUG,PIPE
190734
5310-01-225-5229INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
22NM40
5310-01-225-5230INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5999-01-302-0705INTERCHANGEABLE
CONTACT ASSEMBLY,ELECTRICAL
0878
5998-01-599-0129INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
87012-1
5999-01-728-0432INTERCHANGEABLE
CONTACT,ELECTRICAL
190734

Frequently Asked Questions

What is NSN 5310-00-088-0551?

NSN 5310-00-088-0551 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 5310-00-088-0551?

NSN 5310-00-088-0551 has 40 cross-referenced part numbers: Z00.N5402337004 (Daher Aerospace - Ex Socata), MS20365-440 (Zf Industrieantriebe Witten Gmbh), 69510-28 (Zf Industrieantriebe Witten Gmbh), 1230122 (Westinghouse Electric Corp), 142200440 (Elac Sonar Gmbh) and 35 more.

What NSN replaces 5310-00-088-0551?

There are 9 known substitutes for 5310-00-088-0551: 5320-00-165-8810, 5331-00-166-0980, 5310-00-660-3389 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21044N04?

Key specifications for MS21044N04: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE NUT; Material: STEEL NUT; Bearing Surface Finish: 125.0 MICROINCHES; Thread Series: UNIFIED NATIONAL COARSE (UNC). 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-088-0551 still in active supply?

NSN 5310-00-088-0551 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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