PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21083C8Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-947-1380 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-947-1380 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-947-1380. Primary manufacturer part number: MS21083C8.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT
  • Surface Treatment: PASSIVATE OVERALL EXCEPT INSERT
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
  • Temp Rating: 250.0 FAHRENHEIT MAXIMUM DEGF
  • Nominal Thread Size: 0.500 INCHES IN
  • Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)
  • Thread Quantity Per Inch: 20
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Plastic Polyamide Nylon Locking Insert construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-947-1380, 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 12 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-947-1380
Primary Part NumberMS21083C8
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
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Surface TreatmentPASSIVATE OVERALL EXCEPT INSERT
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
Temp Rating250.0 FAHRENHEIT MAXIMUM DEGF
Nominal Thread Size0.500 INCHES IN
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Thread Quantity Per Inch20
Width Across Flats0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
Countersink Angle88.0 DEGREES MINIMUM NUT
MaterialPLASTIC POLYAMIDE NYLON LOCKING INSERT
Bearing Surface Finish125.0 MICROINCHES
Bearing Surface TypeCHAMFERED OR WASHER FACED
Thread DirectionRIGHT-HAND
Nut Height0.328 INCHES MAXIMUM IN
LubricationSOLUBLE LUBRICANT
MaterialSTEEL CORROSION RESISTING NUT
Nut StyleHEXAGON
Thread Class3B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-00-939-0850MS21083C08 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-01-677-3193 INTERCHANGEABLE
Nut,self-Locking,hexagon
Cross-Reference Index
Part NumberManufacturer
MS21083C8 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
10121867 Nimikkeistokeskus Ncb Finland (FIN)
803-5001003-X4X X-10 Zf Industrieantriebe Witten Gmbh (DEU)
L79NTE-820 Harvard Industries Inc (USA)
21333 FIND 46 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
5310PL0848150 Jednolity Indeks Materialowy - Uniform Material Index (POL)
5310009471380 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
MS21083C8 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
5310PL0958704 Jednolity Indeks Materialowy - Uniform Material Index (POL)
NASM25027 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
4158071-18 Zf Industrieantriebe Witten Gmbh (DEU)
803-5959306-3XX-025 Naval Sea Systems Command (USA)
Related Parts
5310-00-939-0850INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21083C08
5310-01-677-3193INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-947-1380?

NSN 5310-00-947-1380 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 5310-00-947-1380?

NSN 5310-00-947-1380 has 12 cross-referenced part numbers: MS21083C8 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 10121867 (Nimikkeistokeskus Ncb Finland), 803-5001003-X4X X-10 (Zf Industrieantriebe Witten Gmbh), L79NTE-820 (Harvard Industries Inc), 21333 FIND 46 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace) and 7 more.

What NSN replaces 5310-00-947-1380?

There are 2 known substitutes for 5310-00-947-1380: 5310-00-939-0850, 5310-01-677-3193. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21083C8?

Key specifications for MS21083C8: Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT; Surface Treatment: PASSIVATE OVERALL EXCEPT INSERT; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT; Temp Rating: 250.0 FAHRENHEIT MAXIMUM DEGF. 19 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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