PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8240-3Nut,plain,hexagon

Cummins Inc. · NSN 5310-00-220-6704 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-220-6704 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-220-6704. Primary manufacturer part number: 8240-3.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Quantity Per Inch: 12
  • Features Provided: CASEHARDENED
  • Thread Series: UNF
  • Bearing Surface Type: WASHER FACED
  • Thread Direction: RIGHT-HAND
  • Nut Style: HEXAGON
  • Width Across Flats: 1.812 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1040 Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-220-6704, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Cummins Inc.. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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
NSN5310-00-220-6704
Primary Part Number8240-3
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCummins Inc.
StatusACTIVE
Thread Quantity Per Inch12
Features ProvidedCASEHARDENED
Thread SeriesUNF
Bearing Surface TypeWASHER FACED
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
Width Across Flats1.812 INCHES NOMINAL IN
Nut Height1.750 INCHES NOMINAL IN
Thread Class2B
Nominal Thread Size1.250 INCHES IN
MaterialSTEEL COMP 1040 OVERALL
Material Document and ClassificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5945-00-013-956682403 INTERCHANGEABLE
Relay,electromagnetic
Foster Bros Mfg Co
4820-00-822-2450 INTERCHANGEABLE
Stem,diaphragm Assembly
5945-01-279-7975 INTERCHANGEABLE
Relay,electromagnetic
5120-01-696-3819 INTERCHANGEABLE
Screwdriver Set,flat Tip
Cross-Reference Index
Part NumberManufacturer
8240-3 PRIMARY Cummins Inc. (USA)
Related Parts
5945-00-013-9566INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
82403
4820-00-822-2450INTERCHANGEABLE
STEM,DIAPHRAGM ASSEMBLY
5945-01-279-7975INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5120-01-696-3819INTERCHANGEABLE
SCREWDRIVER SET,FLAT TIP

Frequently Asked Questions

What is NSN 5310-00-220-6704?

NSN 5310-00-220-6704 is a Nut,plain,hexagon, manufactured by Cummins Inc., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-220-6704?

NSN 5310-00-220-6704 has 1 cross-referenced part number: 8240-3 (Cummins Inc.).

What NSN replaces 5310-00-220-6704?

There are 4 known substitutes for 5310-00-220-6704: 5945-00-013-9566, 4820-00-822-2450, 5945-01-279-7975 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8240-3?

Key specifications for 8240-3: Thread Quantity Per Inch: 12; Features Provided: CASEHARDENED; Thread Series: UNF; Bearing Surface Type: WASHER FACED. 13 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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