PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

124-1900973 PART NO. 51Nut,plain,hexagon

Naval Sea Systems Command · NSN 5310-01-477-2318 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-477-2318 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-477-2318. Primary manufacturer part number: 124-1900973 PART NO. 51.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Class: 2B
  • Thread Quantity Per Inch: 9
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Nominal Thread Size: 0.875 INCHES IN
  • Material: COPPER ALLOY OVERALL
  • Width Across Flats: 1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-477-2318, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-477-2318
Primary Part Number124-1900973 PART NO. 51
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Thread Class2B
Thread Quantity Per Inch9
Bearing Surface TypeCHAMFERED OR WASHER FACED
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.875 INCHES IN
MaterialCOPPER ALLOY OVERALL
Width Across Flats1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
Nut StyleHEXAGON
Thread DirectionLEFT-HAND
Nut Height0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5310-01-349-408802363-7 INTERCHANGEABLE
Nut,plain,hexagon
Defense Logistics Agency Dba Defense Supply Center Philadelphia
5310-01-475-7192124-4322634 PC 31 INTERCHANGEABLE
Nut,plain,hexagon
Naval Sea Systems Command
3040-01-476-2489124-1900973 PART NO. 21 INTERCHANGEABLE
Spindle,mechanically Actuated
Naval Sea Systems Command
3040-01-479-7762124-1900973 PART N0. 26 INTERCHANGEABLE
Bracket,eye,nonrotating Shaft
Naval Sea Systems Command
Cross-Reference Index
Part NumberManufacturer
124-1900973 PART NO. 51 PRIMARY Naval Sea Systems Command (USA)
1900973 Naval Sea Systems Command (USA)
Related Parts
5310-01-349-4088INTERCHANGEABLE
NUT,PLAIN,HEXAGON
02363-7
5310-01-475-7192INTERCHANGEABLE
NUT,PLAIN,HEXAGON
124-4322634 PC 31
3040-01-476-2489INTERCHANGEABLE
SPINDLE,MECHANICALLY ACTUATED
124-1900973 PART NO. 21
3040-01-479-7762INTERCHANGEABLE
BRACKET,EYE,NONROTATING SHAFT
124-1900973 PART N0. 26

Frequently Asked Questions

What is NSN 5310-01-477-2318?

NSN 5310-01-477-2318 is a Nut,plain,hexagon, manufactured by Naval Sea Systems Command, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-477-2318?

NSN 5310-01-477-2318 has 2 cross-referenced part numbers: 124-1900973 PART NO. 51 (Naval Sea Systems Command), 1900973 (Naval Sea Systems Command).

What NSN replaces 5310-01-477-2318?

There are 4 known substitutes for 5310-01-477-2318: 5310-01-349-4088, 5310-01-475-7192, 3040-01-476-2489 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 124-1900973 PART NO. 51?

Key specifications for 124-1900973 PART NO. 51: Thread Class: 2B; Thread Quantity Per Inch: 9; Bearing Surface Type: CHAMFERED OR WASHER FACED; Thread Series: UNIFIED NATIONAL COARSE (UNC). 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com