PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4B2043Nut,plain,hexagon

Caterpillar Inc Div Caterpillar Defense · NSN 5310-00-208-9738 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-208-9738 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-208-9738. Primary manufacturer part number: 4B2043.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Class: 2B
  • Thread Quantity Per Inch: 32
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Nominal Thread Size: 0.164 INCHES IN
  • Bearing Surface Type: FLAT
  • Width Across Flats: 0.344 INCHES NOMINAL IN
  • Material: STEEL COMP 1050 OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1050 Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-208-9738, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 11 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-208-9738
Primary Part Number4B2043
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Thread Class2B
Thread Quantity Per Inch32
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.164 INCHES IN
Bearing Surface TypeFLAT
Width Across Flats0.344 INCHES NOMINAL IN
MaterialSTEEL COMP 1050 OVERALL
Material Document and ClassificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread DirectionRIGHT-HAND
Nut Height0.125 INCHES NOMINAL IN
Nut StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-01-045-5588M925A INTERCHANGEABLE
Nut,plain,hexagon
Gardner Denver Inc.
Cross-Reference Index
Part NumberManufacturer
4B2043 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
Related Parts
5310-01-045-5588INTERCHANGEABLE
NUT,PLAIN,HEXAGON
M925A

Frequently Asked Questions

What is NSN 5310-00-208-9738?

NSN 5310-00-208-9738 is a Nut,plain,hexagon, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-208-9738?

NSN 5310-00-208-9738 has 1 cross-referenced part number: 4B2043 (Caterpillar Inc Div Caterpillar Defense).

What NSN replaces 5310-00-208-9738?

There is 1 known substitute for 5310-00-208-9738: 5310-01-045-5588. Verify interchangeability with system specifications before substitution.

What are the specifications of 4B2043?

Key specifications for 4B2043: Thread Class: 2B; Thread Quantity Per Inch: 32; Thread Series: UNIFIED NATIONAL COARSE (UNC); Nominal Thread Size: 0.164 INCHES IN. 11 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