PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21042-04Nut,self-Locking,extended Washer

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-811-6419 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-811-6419 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-811-6419. Primary manufacturer part number: MS21042-04.
Features
  • Nut,self-Locking,extended Washer — FSC 5310
  • Washer Thickness: 0.010 INCHES MINIMUM IN
  • Nut Style: HEXAGON
  • Washer Outside Diameter: 0.206 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: CADMIUM OVERALL
  • Nominal Thread Size: 0.112 INCHES IN
  • Width Across Flats: 0.150 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-811-6419, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 32 commercial cross-references from 28 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
NSN5310-00-811-6419
Primary Part NumberMS21042-04
Item NameNut,self-Locking,extended Washer
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Washer Thickness0.010 INCHES MINIMUM IN
Nut StyleHEXAGON
Washer Outside Diameter0.206 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentCADMIUM OVERALL
Nominal Thread Size0.112 INCHES IN
Width Across Flats0.150 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
Thread Class3B
Thread Quantity Per Inch40
Thread SeriesUNJC
Thread DirectionRIGHT-HAND
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Temp Rating450.0 FAHRENHEIT NOMINAL DEGF
Hardness Rating49.0 ROCKWELL C MAXIMUM
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5365-00-028-3431648195 INTERCHANGEABLE
Shim Set
Am General Llc
5330-00-534-154380552 INTERCHANGEABLE
Gasket Assembly
Honeywell International Inc. Div Aerospace - Torrance
5930-00-543-8824 INTERCHANGEABLE
Switch,rotary
6850-01-057-6427 INTERCHANGEABLE
Inhibitor,icing,fuel System
Cross-Reference Index
Part NumberManufacturer
MS21042-04 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS 21042-04 Rosomak S.a (POL)
H14L04CW Satair A/s (DNK)
938.07.68.501 Pilatus Aircraft Ltd (CHE)
FN12-40 Sps Technologies, Llc Dba PB Fasteners (USA)
MS21042-04C Zf Industrieantriebe Witten Gmbh (DEU)
F52LH3324-40 Harvard Industries Inc (USA)
22MM40 Amerace Ltd (CAN)
38FM440 Sps Technologies, Llc Dba PB Fasteners (USA)
H14L04CW Tecnotec Sarl (FRA)
FN12A-40 Sps Technologies, Llc Dba PB Fasteners (USA)
MS21042-04 Rbsl Washington (GBR)
723009731500 Leonardo Spa Divisione Sistemi Di Difesa (ITA)
80552 Unison Industries, Llc Dba Unison Industries Inc (USA)
5310008116419 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
T98S440CPC Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace (USA)
2 0040-323 Bae Systems Hagglunds Aktiebolag (SWE)
4138-0021 Bae Systems Information & Electronic Systems Integration Inc. (USA)
MS21042C04 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
38-0021 Merillat Road Supply Co (USA)
Related Parts
5365-00-028-3431INTERCHANGEABLE
SHIM SET
648195
5330-00-534-1543INTERCHANGEABLE
GASKET ASSEMBLY
80552
5930-00-543-8824INTERCHANGEABLE
SWITCH,ROTARY
6850-01-057-6427INTERCHANGEABLE
INHIBITOR,ICING,FUEL SYSTEM

Frequently Asked Questions

What is NSN 5310-00-811-6419?

NSN 5310-00-811-6419 is a Nut,self-Locking,extended Washer, 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 5310-00-811-6419?

NSN 5310-00-811-6419 has 32 cross-referenced part numbers: MS21042-04 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MS 21042-04 (Rosomak S.a), H14L04CW (Satair A/s), 938.07.68.501 (Pilatus Aircraft Ltd), FN12-40 (Sps Technologies, Llc Dba PB Fasteners) and 27 more.

What NSN replaces 5310-00-811-6419?

There are 4 known substitutes for 5310-00-811-6419: 5365-00-028-3431, 5330-00-534-1543, 5930-00-543-8824 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21042-04?

Key specifications for MS21042-04: Washer Thickness: 0.010 INCHES MINIMUM IN; Nut Style: HEXAGON; Washer Outside Diameter: 0.206 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-811-6419 still in active supply?

NSN 5310-00-811-6419 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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