PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILB857TYPE3STYLEA0RBNut,plain,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-260-7789 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-260-7789 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-260-7789. Primary manufacturer part number: MILB857TYPE3STYLEA0RB.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Class: 2B
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Nominal Thread Size: 0.312 INCHES IN
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Thread Quantity Per Inch: 18
  • Material: COPPER ALLOY OVERALL
  • Material Document and Classification: QQ-B-626,COMP 11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
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 5310-00-260-7789, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-260-7789
Primary Part NumberMILB857TYPE3STYLEA0RB
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread Class2B
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.312 INCHES IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
Thread Quantity Per Inch18
MaterialCOPPER ALLOY OVERALL
Material Document and ClassificationQQ-B-626,COMP 11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nut Height0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
Width Across Flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-199-3144 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-199-3145 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-199-3148 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-199-3152 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-199-3153 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-199-3154 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-199-3155 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-260-7790 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-260-7794 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-260-7795 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
MILB857TYPE3STYLEA0RB Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-199-3144INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-199-3145INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-199-3148INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-199-3152INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-199-3153INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-199-3154INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-199-3155INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-260-7790INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-260-7794INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-260-7795INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-265-9585INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-265-9589INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-260-7789?

NSN 5310-00-260-7789 is a Nut,plain,hexagon, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-260-7789?

NSN 5310-00-260-7789 has 1 cross-referenced part number: MILB857TYPE3STYLEA0RB (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-260-7789?

There are 12 known substitutes for 5310-00-260-7789: 5310-00-199-3144, 5310-00-199-3145, 5310-00-199-3148 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILB857TYPE3STYLEA0RB?

Key specifications for MILB857TYPE3STYLEA0RB: Thread Class: 2B; Thread Series: UNIFIED NATIONAL COARSE (UNC); Nominal Thread Size: 0.312 INCHES IN; Bearing Surface Type: CHAMFERED OR WASHER FACED. 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