PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21043-4Nut,plain,extended Washer,hexago

Rolls Royce Corp · NSN 5310-01-463-8779 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-463-8779 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-463-8779. Primary manufacturer part number: MS21043-4.
Features
  • Nut,plain,extended Washer,hexago — FSC 5310
  • Width Across Flats: 0.304 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
  • Nominal Thread Size: 0.250 INCHES IN
  • Material: STEEL CORROSION RESISTING OVERALL
  • Material Document and Classification: AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Nut Style: HEXAGON
  • Thread Quantity Per Inch: 28
  • Washer Thickness: 0.019 INCHES MINIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-463-8779, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rolls Royce Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN5310-01-463-8779
Primary Part NumberMS21043-4
Item NameNut,plain,extended Washer,hexago
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerRolls Royce Corp
StatusACTIVE
Width Across Flats0.304 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
Nominal Thread Size0.250 INCHES IN
MaterialSTEEL CORROSION RESISTING OVERALL
Material Document and ClassificationAMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nut StyleHEXAGON
Thread Quantity Per Inch28
Washer Thickness0.019 INCHES MINIMUM IN
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Thread DirectionRIGHT-HAND
Washer Outside Diameter0.420 INCHES MAXIMUM IN
Temp Rating800.0 FAHRENHEIT MAXIMUM DEGF
LubricationSOLUBLE LUBRICANT
Thread Class3B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-00-719-5570T4868C428 INTERCHANGEABLE
Nut,self-Locking,extended Washer
Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems
5310-00-844-48722638719 INTERCHANGEABLE
Nut,self-Locking,extended Washer
Honeywell International Inc Div Aerospace-South Bend (bendix Dr)
Cross-Reference Index
Part NumberManufacturer
MS21043-4 PRIMARY Rolls Royce Corp (USA)
NSN SPECIFIC V-22 AE1107C ENGINE Rolls Royce Corp (USA)
Related Parts
5310-00-719-5570INTERCHANGEABLE
NUT,SELF-LOCKING,EXTENDED WASHER
T4868C428
5310-00-844-4872INTERCHANGEABLE
NUT,SELF-LOCKING,EXTENDED WASHER
2638719

Frequently Asked Questions

What is NSN 5310-01-463-8779?

NSN 5310-01-463-8779 is a Nut,plain,extended Washer,hexago, manufactured by Rolls Royce Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-463-8779?

NSN 5310-01-463-8779 has 2 cross-referenced part numbers: MS21043-4 (Rolls Royce Corp), NSN SPECIFIC V-22 AE1107C ENGINE (Rolls Royce Corp).

What NSN replaces 5310-01-463-8779?

There are 2 known substitutes for 5310-01-463-8779: 5310-00-719-5570, 5310-00-844-4872. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21043-4?

Key specifications for MS21043-4: Width Across Flats: 0.304 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN; Nominal Thread Size: 0.250 INCHES IN; Material: STEEL CORROSION RESISTING OVERALL; Material Document and Classification: AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 15 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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