PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21046-C4Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-059-9265 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-059-9265 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-059-9265. Primary manufacturer part number: MS21046-C4.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Precious Material and Location: OVERALL SILVER
  • Nominal Thread Size: 0.250 INCHES IN
  • Countersink Angle: 88.0 DEGREES NOMINAL NUT
  • Precious Material: SILVER
  • Nut Style: HEXAGON
  • Width Across Flats: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
  • Surface Treatment: SILVER OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-059-9265, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 25 commercial cross-references from 22 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-059-9265
Primary Part NumberMS21046-C4
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
Precious Material and LocationOVERALL SILVER
Nominal Thread Size0.250 INCHES IN
Countersink Angle88.0 DEGREES NOMINAL NUT
Precious MaterialSILVER
Nut StyleHEXAGON
Width Across Flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
Surface TreatmentSILVER OVERALL
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nut Height0.240 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Bearing Surface Finish125.0 MICROINCHES
Thread DirectionRIGHT-HAND
Temp Rating800.0 FAHRENHEIT NOMINAL DEGF
Thread Quantity Per Inch28
Surface Treatment Document and ClassificationAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Thread Class3B
Thread SeriesUNF
MaterialSTEEL CORROSION RESISTING OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
2805-00-391-3032220415BS INTERCHANGEABLE
Tappet,engine Poppet Valve
Brinkley Technology Group Llc Dba Hercules Manufacturing
5310-00-478-4660 INTERCHANGEABLE
Nut,self-Locking,hexagon
5120-00-832-6217 INTERCHANGEABLE
Key,socket Head Screw
5310-00-851-80151803-048 INTERCHANGEABLE
Nut,self-Locking,hexagon
Esna, Llc
5950-01-135-78884038790 INTERCHANGEABLE
Reactor
Honeywell International Inc. Dba Honeywell International
6530-01-623-517352-0924 INTERCHANGEABLE
Restraint Board,full Body
Harvard Bioscience Inc Div Harvard Apparatus
Cross-Reference Index
Part NumberManufacturer
H56-4 Satair A/s (DNK)
1803-048 Harvard Industries Inc (USA)
854261-00 Defense Reduction Agency (USA)
9B2633-02-50A Safran Aerosystems Ex Safran Aerotechnics Plaisir (FRA)
59FH428 Skf Usa Inc. (USA)
R1155P4 General Electric Company Dba Ge Aerospace (USA)
H56-4 Howmet Global Fastening Systems Inc. Div Microdot Products (USA)
39A11817 Triumph Engine Control Systems Llc (USA)
H56-4 Howmet Global Fastening Systems Inc (USA)
R1155P4 International General Electric Co (USA)
803-5184193-1X-14 Naval Sea Systems Command (USA)
MS21046-C4 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
LYC506C4 Zf Industrieantriebe Witten Gmbh (DEU)
MS21046C4 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
206SS4 V I J Corp Div National Utilities Company (USA)
5310000599265 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
59FH-428 Sps Technologies, Llc Dba PB Fasteners (USA)
520924 Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines (USA)
R416P04D General Electric Company (USA)
AN363C428 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
2805-00-391-3032INTERCHANGEABLE
TAPPET,ENGINE POPPET VALVE
220415BS
5310-00-478-4660INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5120-00-832-6217INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
5310-00-851-8015INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
1803-048
5950-01-135-7888INTERCHANGEABLE
REACTOR
4038790
6530-01-623-5173INTERCHANGEABLE
RESTRAINT BOARD,FULL BODY
52-0924

Frequently Asked Questions

What is NSN 5310-00-059-9265?

NSN 5310-00-059-9265 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 5310-00-059-9265?

NSN 5310-00-059-9265 has 25 cross-referenced part numbers: H56-4 (Satair A/s), 1803-048 (Harvard Industries Inc), 854261-00 (Defense Reduction Agency), 9B2633-02-50A (Safran Aerosystems Ex Safran Aerotechnics Plaisir), 59FH428 (Skf Usa Inc.) and 20 more.

What NSN replaces 5310-00-059-9265?

There are 6 known substitutes for 5310-00-059-9265: 2805-00-391-3032, 5310-00-478-4660, 5120-00-832-6217 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21046-C4?

Key specifications for MS21046-C4: Precious Material and Location: OVERALL SILVER; Nominal Thread Size: 0.250 INCHES IN; Countersink Angle: 88.0 DEGREES NOMINAL NUT; Precious Material: SILVER. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-059-9265 still in active supply?

NSN 5310-00-059-9265 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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