PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21040L3Nut,self-Locking,hexagon

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-809-5777 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-809-5777 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-809-5777. Primary manufacturer part number: MS21040L3.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: CADMIUM OVERALL
  • Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Nut Style: HEXAGON
  • Thread Quantity Per Inch: 32
  • Nominal Thread Size: 0.190 INCHES IN
  • Temp Rating: 500.0 FAHRENHEIT NOMINAL DEGF
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1010 Overall construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-809-5777, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 15 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-809-5777
Primary Part NumberMS21040L3
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentCADMIUM OVERALL
Material Document and ClassificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nut StyleHEXAGON
Thread Quantity Per Inch32
Nominal Thread Size0.190 INCHES IN
Temp Rating500.0 FAHRENHEIT NOMINAL DEGF
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Thread DirectionRIGHT-HAND
MaterialSTEEL COMP 1010 OVERALL
LubricationDRY FILM LUBRICANT
Width Across Flats0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN
Thread Class3B
Thread SeriesUNF
Nut Height0.147 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-005-68419602 INTERCHANGEABLE
Transformer,power
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
6140-00-184-34151F5544 INTERCHANGEABLE
Battery,storage
Caterpillar Inc Div Caterpillar Defense
5310-00-275-1292 INTERCHANGEABLE
Washer,flat
5962-00-397-6092 INTERCHANGEABLE
Microcircuit,linear
5930-00-630-9847 INTERCHANGEABLE
Switch,thermostatic
5310-00-807-1474MS21042L3 INTERCHANGEABLE
Nut,self-Locking,extended Washer
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5962-01-042-5385 INTERCHANGEABLE
Microcircuit,digital
5962-01-096-7872581R500L62 INTERCHANGEABLE
Microcircuit,digital
Northrop Grumman Support Services Corp
5962-01-155-2459 INTERCHANGEABLE
Microcircuit,digital
5962-01-251-4559 INTERCHANGEABLE
Microcircuit,digital
Cross-Reference Index
Part NumberManufacturer
MS21040L3 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
96&02 Sps Technologies, Llc Dba Aerospace Fasteners Group Div Aerospace - Santa Ana (USA)
Related Parts
5950-00-005-6841INTERCHANGEABLE
TRANSFORMER,POWER
9602
6140-00-184-3415INTERCHANGEABLE
BATTERY,STORAGE
1F5544
5310-00-275-1292INTERCHANGEABLE
WASHER,FLAT
5962-00-397-6092INTERCHANGEABLE
MICROCIRCUIT,LINEAR
5930-00-630-9847INTERCHANGEABLE
SWITCH,THERMOSTATIC
5310-00-807-1474INTERCHANGEABLE
NUT,SELF-LOCKING,EXTENDED WASHER
MS21042L3
5962-01-042-5385INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5962-01-096-7872INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
581R500L62
5962-01-155-2459INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5962-01-251-4559INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
6515-01-271-1619INTERCHANGEABLE
CLIPPER,HAIR
7100213034
6350-01-333-9538INTERCHANGEABLE
HORN,SIGNAL

Frequently Asked Questions

What is NSN 5310-00-809-5777?

NSN 5310-00-809-5777 is a Nut,self-Locking,hexagon, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-809-5777?

NSN 5310-00-809-5777 has 2 cross-referenced part numbers: MS21040L3 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 96&02 (Sps Technologies, Llc Dba Aerospace Fasteners Group Div Aerospace - Santa Ana).

What NSN replaces 5310-00-809-5777?

There are 12 known substitutes for 5310-00-809-5777: 5950-00-005-6841, 6140-00-184-3415, 5310-00-275-1292 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21040L3?

Key specifications for MS21040L3: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Surface Treatment: CADMIUM OVERALL; Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nut Style: HEXAGON. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-809-5777 still in active supply?

NSN 5310-00-809-5777 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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