PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N25027Nut,self-Locking,spline

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-208-4875 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-208-4875 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-208-4875. Primary manufacturer part number: N25027.
Features
  • Nut,self-Locking,spline — FSC 5310
  • Pilot Diameter: 0.222 INCHES NOMINAL IN
  • Nominal Thread Size: 0.138 INCHES IN
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Thread Quantity Per Inch: 32
  • Pilot Length: 0.063 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
  • Surface Treatment: CADMIUM NUT
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Fiber Locking Insert construction
General Description

The Nut,self-Locking,spline, cataloged under National Stock Number 5310-00-208-4875, 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 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-208-4875
Primary Part NumberN25027
Item NameNut,self-Locking,spline
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Pilot Diameter0.222 INCHES NOMINAL IN
Nominal Thread Size0.138 INCHES IN
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Thread Quantity Per Inch32
Pilot Length0.063 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Surface TreatmentCADMIUM NUT
Thread Class3B
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
MaterialFIBER LOCKING INSERT
MaterialSTEEL NUT
Nut Height0.251 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-208-263152ZE074 INTERCHANGEABLE
Nut,self-Locking,hexagon
Esna, Llc
5310-00-208-4880 INTERCHANGEABLE
Nut,self-Locking,spline
5310-00-208-492442ND36-070 INTERCHANGEABLE
Nut,self-Locking,spline
Esna, Llc
5310-00-274-886710-78363 INTERCHANGEABLE
Nut,self-Locking,hexagon
Unison Industries Llc
5310-00-275-43111106S1032 INTERCHANGEABLE
Nut,self-Locking,plate
Cal-Van Tools Div of Chemi-Trol Chemical Co
5310-00-285-5562 INTERCHANGEABLE
Nut,plain,plate
5325-00-514-27713591-3CN380 INTERCHANGEABLE
Insert,screw Thread
Stanley Engineered Fastening Llc
5310-00-515-8905 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-808-260242ND8-428 INTERCHANGEABLE
Nut,self-Locking,spline
Greer Stop Nut, Inc.
Cross-Reference Index
Part NumberManufacturer
N25027 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-208-2631INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
52ZE074
5310-00-208-4880INTERCHANGEABLE
NUT,SELF-LOCKING,SPLINE
5310-00-208-4924INTERCHANGEABLE
NUT,SELF-LOCKING,SPLINE
42ND36-070
5310-00-274-8867INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
10-78363
5310-00-275-4311INTERCHANGEABLE
NUT,SELF-LOCKING,PLATE
1106S1032
5310-00-285-5562INTERCHANGEABLE
NUT,PLAIN,PLATE
5325-00-514-2771INTERCHANGEABLE
INSERT,SCREW THREAD
3591-3CN380
5310-00-515-8905INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-808-2602INTERCHANGEABLE
NUT,SELF-LOCKING,SPLINE
42ND8-428

Frequently Asked Questions

What is NSN 5310-00-208-4875?

NSN 5310-00-208-4875 is a Nut,self-Locking,spline, 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 5310-00-208-4875?

NSN 5310-00-208-4875 has 1 cross-referenced part number: N25027 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-208-4875?

There are 9 known substitutes for 5310-00-208-4875: 5310-00-208-2631, 5310-00-208-4880, 5310-00-208-4924 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N25027?

Key specifications for N25027: Pilot Diameter: 0.222 INCHES NOMINAL IN; Nominal Thread Size: 0.138 INCHES IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Quantity Per Inch: 32. 12 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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