PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NASM21045Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-01-473-1810 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-473-1810 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-473-1810. Primary manufacturer part number: NASM21045.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Thread Direction: RIGHT-HAND
  • Nominal Thread Size: 0.250 INCHES IN
  • Bearing Surface Finish: 125.0 MICROINCHES
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Surface Treatment Document and Classification: QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: CADMIUM OVERALL
  • Material: STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1030 OR STEEL COMP 1035 OR STEEL COMP 1045 OR STEEL COMP 1110 OR STEEL COMP 1117 OR STEEL COMP 1118 OR STEEL COMP 1137 OR STEEL COMP 1213 OR STEEL COMP 8740 OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1008 or Steel Comp 1010 or Steel Comp 1015 or Steel Comp 1018 or Steel Comp 1021 or Steel Comp 1022 or Steel Comp 1030 or Steel Comp 1035 or Steel Comp 1045 or Steel Comp 1110 or Steel Comp 1117 or Steel Comp 1118 or Steel Comp 1137 or Steel Comp 1213 or Steel Comp 8740 Overall construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-473-1810, 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 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-473-1810
Primary Part NumberNASM21045
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
StatusACTIVE
Thread DirectionRIGHT-HAND
Nominal Thread Size0.250 INCHES IN
Bearing Surface Finish125.0 MICROINCHES
Bearing Surface TypeCHAMFERED OR WASHER FACED
Surface Treatment Document and ClassificationQQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentCADMIUM OVERALL
MaterialSTEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1030 OR STEEL COMP 1035 OR STEEL COMP 1045 OR STEEL COMP 1110 OR STEEL COMP 1117 OR STEEL COMP 1118 OR STEEL COMP 1137 OR STEEL COMP 1213 OR STEEL COMP 8740 OVERALL
Material Document and ClassificationASTM A29 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5050 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5060 ASSN STD 3RD MATERIAL RESPONSE OR AMS 5069 ASSN STD 4TH MATERIAL RESPONSE OR AMS 5070 ASSN STD 5TH MATERIAL RESPONSE OR AMS 5080 ASSN STD 5TH MATERIAL RESPONSE OR AMS 5022 ASSN STD 7TH MATERIAL RESPONSE OR AMS 5024 ASSN STD 8TH MATERIAL RESPONSE OR AMS 5020 ASSN STD 9TH MATERIAL RESPONSE OR AMS 6322 ASSN STD 10TH MATERIAL RESPONSE OVERALL
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Thread Class3B
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Width Across Flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
Thread Quantity Per Inch28
Temp Rating450.0 FAHRENHEIT NOMINAL DEGF
Nut Height0.240 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
LubricationSOLUBLE LUBRICANT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-00-982-5000MS21045C04 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
NASM21045 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
MS21045-4S Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-982-5000INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21045C04

Frequently Asked Questions

What is NSN 5310-01-473-1810?

NSN 5310-01-473-1810 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: active.

What are the part numbers for NSN 5310-01-473-1810?

NSN 5310-01-473-1810 has 2 cross-referenced part numbers: NASM21045 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), MS21045-4S (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-01-473-1810?

There is 1 known substitute for 5310-01-473-1810: 5310-00-982-5000. Verify interchangeability with system specifications before substitution.

What are the specifications of NASM21045?

Key specifications for NASM21045: Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES IN; Bearing Surface Finish: 125.0 MICROINCHES; Bearing Surface Type: CHAMFERED OR WASHER FACED. 17 total characteristics are documented in the Federal Logistics Information System.

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