PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21044N6Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-950-0039 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-950-0039 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-950-0039. Primary manufacturer part number: MS21044N6.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Nut Height: 0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
  • Bearing Surface Finish: 125.0 MICROINCHES
  • Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF
  • Width Across Flats: 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
  • Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)
  • Thread Quantity Per Inch: 24
  • Nominal Thread Size: 0.375 INCHES IN
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 5310-00-950-0039, 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 (FLIS). This item has 30 commercial cross-references from 20 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
NSN5310-00-950-0039
Primary Part NumberMS21044N6
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 Height0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
Bearing Surface Finish125.0 MICROINCHES
Temp Rating250.0 FAHRENHEIT NOMINAL DEGF
Width Across Flats0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Thread Quantity Per Inch24
Nominal Thread Size0.375 INCHES IN
Countersink Angle88.0 DEGREES NOMINAL NUT
Thread Class3B
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
Bearing Surface TypeCHAMFERED OR WASHER FACED
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
LubricationSOLUBLE LUBRICANT
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
Surface TreatmentCADMIUM OVERALL EXCEPT INSERT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
5310-00-262-83052F8616 INTERCHANGEABLE
Nut,self-Locking,hexagon
Caterpillar Inc Div Caterpillar Defense
5310-00-275-2087 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-275-2090 INTERCHANGEABLE
Nut,self-Locking,hexagon
5305-00-725-2317AES01C375A50AW9A91 INTERCHANGEABLE
Screw,cap,hexagon Head
The American Society of Mechanical Engineers
5310-00-982-4908MS21045-6 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5325-01-100-5673 INTERCHANGEABLE
Ring,retaining
2805-01-226-80630392591 INTERCHANGEABLE
Connecting Rod,piston
Brp Us Inc
5310-01-339-1433387-831AP INTERCHANGEABLE
Nut,plain,round
Acme Products & Engineering Inc
4130-01-516-0912905153 INTERCHANGEABLE
Filter Element,air Conditioning
Airsan Corporation Dba Airsan Corp
Cross-Reference Index
Part NumberManufacturer
5310PL0530873 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MS21044N6 Leonardo Spa Helicopters Division - Production Site (ITA)
5310PL2091896 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MS20365-624A Zf Industrieantriebe Witten Gmbh (DEU)
AN365624 Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group
5310PL0826967 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MS21044-N6 Pioneer Aerospace Corp (USA)
5310PL2066694 Jednolity Indeks Materialowy - Uniform Material Index (POL)
387-831 Zf Industrieantriebe Witten Gmbh (DEU)
525-628-90457 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
0.375UNF European Industrial Services Ltd T/a Nettlefolds (GBR)
AN365-624 Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group
MS21044N6 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
A125J European Industrial Services Ltd T/a Nettlefolds (GBR)
800996 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament (USA)
5310009500039 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
905153 Scandinavian Manufacturing Scama Ab (SWE)
MS21044N6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
NEE3410-064 Esna, Llc (USA)
NUT654 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
Related Parts
5310-00-262-8305INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
2F8616
5310-00-275-2087INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-275-2090INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5305-00-725-2317INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
AES01C375A50AW9A91
5310-00-982-4908INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21045-6
5325-01-100-5673INTERCHANGEABLE
RING,RETAINING
2805-01-226-8063INTERCHANGEABLE
CONNECTING ROD,PISTON
0392591
5310-01-339-1433INTERCHANGEABLE
NUT,PLAIN,ROUND
387-831AP
4130-01-516-0912INTERCHANGEABLE
FILTER ELEMENT,AIR CONDITIONING
905153

Frequently Asked Questions

What is NSN 5310-00-950-0039?

NSN 5310-00-950-0039 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 5310-00-950-0039?

NSN 5310-00-950-0039 has 30 cross-referenced part numbers: 5310PL0530873 (Jednolity Indeks Materialowy - Uniform Material Index), MS21044N6 (Leonardo Spa Helicopters Division - Production Site), 5310PL2091896 (Jednolity Indeks Materialowy - Uniform Material Index), MS20365-624A (Zf Industrieantriebe Witten Gmbh), AN365624 (Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group) and 25 more.

What NSN replaces 5310-00-950-0039?

There are 9 known substitutes for 5310-00-950-0039: 5310-00-262-8305, 5310-00-275-2087, 5310-00-275-2090 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21044N6?

Key specifications for MS21044N6: Nut Height: 0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES; Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF; Width Across Flats: 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-950-0039 still in active supply?

NSN 5310-00-950-0039 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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