PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21045C6Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-059-9264 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-059-9264 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-059-9264. Primary manufacturer part number: MS21045C6.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Width Across Flats: 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
  • Nominal Thread Size: 0.375 INCHES IN
  • Locking Feature: PREVAILING TORQUE ALL METAL DESIGN
  • Thread Direction: RIGHT-HAND
  • Nut Height: 0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Countersink Angle: 88.0 DEGREES NOMINAL NUT
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 5310-00-059-9264, 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 17 commercial cross-references from 15 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-059-9264
Primary Part NumberMS21045C6
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
Width Across Flats0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
Nominal Thread Size0.375 INCHES IN
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Thread DirectionRIGHT-HAND
Nut Height0.318 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Countersink Angle88.0 DEGREES NOMINAL NUT
Bearing Surface Finish125.0 MICROINCHES
LubricationDRY FILM LUBRICANT
Surface TreatmentPASSIVATE OVERALL
Temp Rating450.0 FAHRENHEIT NOMINAL DEGF
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nut StyleHEXAGON
Thread Quantity Per Inch24
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
MaterialSTEEL CORROSION RESISTING OVERALL
Thread Class3B
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5310-00-067-4903 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-275-2069 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-515-8905 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-982-5003MS21045C06 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
KR2318-29 R G Rollin Co (USA)
SM1813-064 Harvard Industries Inc (USA)
MS21045C06 Zf Industrieantriebe Witten Gmbh (DEU)
58FH-624 Sps Technologies, Llc Dba PB Fasteners (USA)
H57-6 Howmet Global Fastening Systems Inc (USA)
AN363C624 Raytheon Company Dba Raytheon (USA)
13207E3409FN49 Cecom Lr Center (USA)
KR780700 PIECE 29 R G Rollin Co (USA)
H57-6 Satair A/s (DNK)
MS51922-22 Zf Industrieantriebe Witten Gmbh (DEU)
H57-6 Howmet Global Fastening Systems Inc. Div Microdot Products (USA)
MS21045C6 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
63D06 Vme Americas Inc Sub of Vme Group N V (USA)
YE3222 Lamson and Sessions Co the (USA)
MS21045C6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
9328593 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA)
MS21045C6 B-N Group Ltd (GBR)
Related Parts
5310-00-067-4903INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-275-2069INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-515-8905INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-982-5003INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21045C06

Frequently Asked Questions

What is NSN 5310-00-059-9264?

NSN 5310-00-059-9264 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 5310-00-059-9264?

NSN 5310-00-059-9264 has 17 cross-referenced part numbers: KR2318-29 (R G Rollin Co), SM1813-064 (Harvard Industries Inc), MS21045C06 (Zf Industrieantriebe Witten Gmbh), 58FH-624 (Sps Technologies, Llc Dba PB Fasteners), H57-6 (Howmet Global Fastening Systems Inc) and 12 more.

What NSN replaces 5310-00-059-9264?

There are 4 known substitutes for 5310-00-059-9264: 5310-00-067-4903, 5310-00-275-2069, 5310-00-515-8905 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21045C6?

Key specifications for MS21045C6: Width Across Flats: 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN; Nominal Thread Size: 0.375 INCHES IN; Locking Feature: PREVAILING TORQUE ALL METAL DESIGN; Thread Direction: RIGHT-HAND. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-059-9264 still in active supply?

NSN 5310-00-059-9264 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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