PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

10321Nut,self-Locking,hexagon

Harvard Industries Inc · NSN 5310-00-959-7600 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-959-7600 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-959-7600. Primary manufacturer part number: 10321.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT
  • Thread Quantity Per Inch: 28
  • Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF
  • Width Across Flats: 0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
  • Thread Series: UNF
  • Bearing Surface Finish: 125.0 MICROINCHES
  • Nominal Thread Size: 0.250 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Plastic Polyamide Nylon Locking Insert construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-959-7600, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Harvard Industries Inc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, 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
NSN5310-00-959-7600
Primary Part Number10321
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHarvard Industries Inc
StatusACTIVE
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Thread Quantity Per Inch28
Temp Rating250.0 FAHRENHEIT NOMINAL DEGF
Width Across Flats0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
Thread SeriesUNF
Bearing Surface Finish125.0 MICROINCHES
Nominal Thread Size0.250 INCHES IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
MaterialPLASTIC POLYAMIDE NYLON LOCKING INSERT
Surface Treatment Document and ClassificationQQ-P-416, TY 2, CL 2 OR 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
MaterialSTEEL NUT
Thread Class2B
Nut StyleHEXAGON
LubricationDRY FILM LUBRICANT
Surface TreatmentCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
Thread DirectionRIGHT-HAND
Material Document and ClassificationSAE J995 GR 5 ASSN STD SINGLE MATERIAL RESPONSE NUT
Nut Height0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-081-1691 INTERCHANGEABLE
Seal,plain Encased
3110-00-155-6661 INTERCHANGEABLE
Bearing,ball,annular
5305-00-208-1862 INTERCHANGEABLE
Screw,machine
5930-00-259-8957 INTERCHANGEABLE
Switch,rotary
5945-00-275-055162A100D3017 INTERCHANGEABLE
Relay,electromagnetic
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5999-00-417-8175 INTERCHANGEABLE
Mounting Pad,electrical-Electron
3040-00-521-1388SM-B-157188 INTERCHANGEABLE
Lever,manual Control
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-00-832-158210321 INTERCHANGEABLE
Spring,helical,compression
Setra Systems, Inc. Dba Gems Sensors
5965-00-864-804460D4302-2 INTERCHANGEABLE
Shell,earphone
Air Force Lifecycle Management Center Electronic Components (aflcmc/ezss)
5310-00-877-5796MS21044N4 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
10321 Harvard Industries Inc (USA)
0320655 Daf Trucks N.v. (NLD)
MS51922-5 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
5310009597600 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
MIL-DTL-45913/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
320655 Daf Trucks N.v. (NLD)
M45913/1-4FG5C Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5330-00-081-1691INTERCHANGEABLE
SEAL,PLAIN ENCASED
3110-00-155-6661INTERCHANGEABLE
BEARING,BALL,ANNULAR
5305-00-208-1862INTERCHANGEABLE
SCREW,MACHINE
5930-00-259-8957INTERCHANGEABLE
SWITCH,ROTARY
5945-00-275-0551INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
62A100D3017
5999-00-417-8175INTERCHANGEABLE
MOUNTING PAD,ELECTRICAL-ELECTRON
3040-00-521-1388INTERCHANGEABLE
LEVER,MANUAL CONTROL
SM-B-157188
5360-00-832-1582INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
10321
5965-00-864-8044INTERCHANGEABLE
SHELL,EARPHONE
60D4302-2
5310-00-877-5796INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21044N4
5935-00-879-1272INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5133-00-988-5708INTERCHANGEABLE
DRILL,TWIST
18677 OLE PRO

Frequently Asked Questions

What is NSN 5310-00-959-7600?

NSN 5310-00-959-7600 is a Nut,self-Locking,hexagon, manufactured by Harvard Industries Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-959-7600?

NSN 5310-00-959-7600 has 7 cross-referenced part numbers: 10321 (Harvard Industries Inc), 0320655 (Daf Trucks N.v.), MS51922-5 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 5310009597600 (E.c.a Etablissement Centrald'approvisionnement Des Forces Armee), MIL-DTL-45913/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 2 more.

What NSN replaces 5310-00-959-7600?

There are 12 known substitutes for 5310-00-959-7600: 5330-00-081-1691, 3110-00-155-6661, 5305-00-208-1862 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 10321?

Key specifications for 10321: Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT; Thread Quantity Per Inch: 28; Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF; End Item Identification: MRAP RG-31 & ROUTE CLEARANCE VEHICLE; MEDIUM MINE PROTECTED VEHICLE - MMPV. 19 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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