PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILB857TYPE4STYLEA0RBNut,plain,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-189-5165 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-189-5165 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-189-5165. Primary manufacturer part number: MILB857TYPE4STYLEA0RB.
Features
  • Nut,plain,hexagon — FSC 5310
  • Nominal Thread Size: 0.500 INCHES IN
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Thread Quantity Per Inch: 13
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Surface Treatment: PASSIVATE OVERALL
  • Thread Direction: RIGHT-HAND
  • Departure From Cited Document: AS MODIFIED BY MATERIAL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 410 or Steel Comp 416 Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-189-5165, 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 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-189-5165
Primary Part NumberMILB857TYPE4STYLEA0RB
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
Nominal Thread Size0.500 INCHES IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
Thread Quantity Per Inch13
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Surface TreatmentPASSIVATE OVERALL
Thread DirectionRIGHT-HAND
Departure From Cited DocumentAS MODIFIED BY MATERIAL
MaterialSTEEL COMP 410 OR STEEL COMP 416 OVERALL
Nut Height0.296 INCHES NOMINAL IN
Material Document and ClassificationQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763,COND A FED SPEC 2ND MATERIAL RESPONSE OVERALL
Nondefinitive Spec/std Data4 TYPE AND A STYLE AND B STYLE
Thread Class2B
Width Across Flats0.788 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN
Nut StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5310-00-189-5161 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-189-5162 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-189-8471 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-189-8476 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-297-883221824 INTERCHANGEABLE
Nut,plain,hexagon
Dresser, Llc
5310-00-297-88333153766PC126 INTERCHANGEABLE
Nut,plain,hexagon
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
MILB857TYPE4STYLEA0RB Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
43N3934-10 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
5310-00-189-5161INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-189-5162INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-189-8471INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-189-8476INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-297-8832INTERCHANGEABLE
NUT,PLAIN,HEXAGON
21824
5310-00-297-8833INTERCHANGEABLE
NUT,PLAIN,HEXAGON
3153766PC126

Frequently Asked Questions

What is NSN 5310-00-189-5165?

NSN 5310-00-189-5165 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 5310-00-189-5165?

NSN 5310-00-189-5165 has 2 cross-referenced part numbers: MILB857TYPE4STYLEA0RB (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 43N3934-10 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 5310-00-189-5165?

There are 6 known substitutes for 5310-00-189-5165: 5310-00-189-5161, 5310-00-189-5162, 5310-00-189-8471 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILB857TYPE4STYLEA0RB?

Key specifications for MILB857TYPE4STYLEA0RB: Nominal Thread Size: 0.500 INCHES IN; Bearing Surface Type: CHAMFERED OR WASHER FACED; Thread Quantity Per Inch: 13; Thread Series: UNIFIED NATIONAL COARSE (UNC). 14 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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