PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21083C08Nut,self-Locking,hexagon

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-939-0850 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-939-0850 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-939-0850. Primary manufacturer part number: MS21083C08.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Nut Style: HEXAGON
  • Thread Quantity Per Inch: 32
  • Lubrication: SOLUBLE LUBRICANT
  • Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT
  • Nominal Thread Size: 0.164 INCHES IN
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Nut construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-939-0850, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 29 commercial cross-references from 22 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-939-0850
Primary Part NumberMS21083C08
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Nut StyleHEXAGON
Thread Quantity Per Inch32
LubricationSOLUBLE LUBRICANT
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Nominal Thread Size0.164 INCHES IN
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
Bearing Surface TypeCHAMFERED OR WASHER FACED
MaterialSTEEL CORROSION RESISTING NUT
Width Across Flats0.336 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
Temp Rating250.0 FAHRENHEIT MAXIMUM DEGF
Bearing Surface Finish125.0 MICROINCHES
Countersink Angle88.0 DEGREES MINIMUM NUT
Thread SeriesUNJC
MaterialPLASTIC POLYAMIDE NYLON LOCKING INSERT
Nut Height0.188 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Surface TreatmentPASSIVATE NUT
Thread Class3B
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-045-116161114 INTERCHANGEABLE
Transformer,audio Frequency
Dynalec Corporation
5305-00-054-6674 INTERCHANGEABLE
Screw,machine
6695-00-138-951310501 INTERCHANGEABLE
Meter Movement
The Aeronautical Instrument and Radio Company Dba the Aeronautical Instrument and Radio Company Div the Aeronautical Instrument and
5310-00-148-8916 INTERCHANGEABLE
Washer,flat
6515-00-426-951410501 INTERCHANGEABLE
Syringe,oral
Smith and Nephew Inc Smith and Nephew Equipment Div
5940-00-642-072510034235 INTERCHANGEABLE
Terminal,stud
Us Army Aviation and Missile Command
5310-00-655-7219NAS620-416 INTERCHANGEABLE
Washer,flat
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-00-767-4814 INTERCHANGEABLE
Washer,flat
5310-00-947-1380MS21083C8 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-00-982-6814MS21044C08 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
75NTM82 Harvard Industries Inc (USA)
1V0064-00 Defense Reduction Agency (USA)
21C1599-22 General Electric Company (USA)
MS21083C8 Zf Industrieantriebe Witten Gmbh (DEU)
C15013-007 Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company (USA)
MS21083C08 Singer Co the Kearfott Div (USA)
79NTM82 Harvard Industries Inc (USA)
15013-7 Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company (USA)
MS21083C08 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
2052907-6 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
114-0576-003 The Boeing Company Div Legacy Boeing Hb1 (USA)
E1211163 CAGE A01PJ
001-00448-0A Genfoot Inchamburg Felt Div (CAN)
MS21083C08 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS51957-49 Zf Industrieantriebe Witten Gmbh (DEU)
10501 Kleinschmidt Inc (USA)
15013-007 Marathon Power Technologies Ltd (GBR)
203688C7 Viking Technologies, Ltd. (USA)
79NTM82 Dover Stamping Co Div of Parkersburg Steel Co (USA)
6259163-001 Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
5950-00-045-1161INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
61114
5305-00-054-6674INTERCHANGEABLE
SCREW,MACHINE
6695-00-138-9513INTERCHANGEABLE
METER MOVEMENT
10501
5310-00-148-8916INTERCHANGEABLE
WASHER,FLAT
6515-00-426-9514INTERCHANGEABLE
SYRINGE,ORAL
10501
5940-00-642-0725INTERCHANGEABLE
TERMINAL,STUD
10034235
5310-00-655-7219INTERCHANGEABLE
WASHER,FLAT
NAS620-416
5310-00-767-4814INTERCHANGEABLE
WASHER,FLAT
5310-00-947-1380INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21083C8
5310-00-982-6814INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21044C08
5310-01-070-2836INTERCHANGEABLE
LOCKWASHER SET,DISC
5310-01-127-2963INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-939-0850?

NSN 5310-00-939-0850 is a Nut,self-Locking,hexagon, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-939-0850?

NSN 5310-00-939-0850 has 29 cross-referenced part numbers: 75NTM82 (Harvard Industries Inc), 1V0064-00 (Defense Reduction Agency), 21C1599-22 (General Electric Company), MS21083C8 (Zf Industrieantriebe Witten Gmbh), C15013-007 (Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company) and 24 more.

What NSN replaces 5310-00-939-0850?

There are 12 known substitutes for 5310-00-939-0850: 5950-00-045-1161, 5305-00-054-6674, 6695-00-138-9513 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21083C08?

Key specifications for MS21083C08: Nut Style: HEXAGON; Thread Quantity Per Inch: 32; End Item Identification: W/S:STREAM (STD. TENSIONED REPLENISHMENT AT SEA METHOD); FIRE CONTROL SYSTEM, MISSILE MK74 (FCS); SUPPORT EQUIPMENT, B-1 AIRCRAFT; GUIDED MISSILE LAUNCHING SYSTEM, MK 26 (GMLS); AIRBORNE MOBILE DIR AIR SPT CTL (2ID), (02M JUL83)(AN/UYQ-3A); SUPPORT EQUIPMENT, B-52 AIRCRAFT; RADAR SET, AN/TPN-18; AIRCRAFT, SOF (AC-130H, MC-130H, EC-130E, HC-130); COMMUNICATIONS TERMINAL, SATELLITE AN/GSC-39(V)1; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE A; Lubrication: SOLUBLE LUBRICANT. 19 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-939-0850 still in active supply?

NSN 5310-00-939-0850 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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