PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9621-21Nut,self-Locking,hexagon

Microwave Engineering Corporation · NSN 5310-00-061-8867 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-061-8867 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-061-8867. Primary manufacturer part number: 9621-21.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Thread Direction: RIGHT-HAND
  • Material: STEEL CORROSION RESISTING OVERALL
  • Nut Height: 0.178 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 32
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Nominal Thread Size: 0.138 INCHES IN
  • Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-061-8867, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Microwave Engineering Corporation. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-061-8867
Primary Part Number9621-21
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMicrowave Engineering Corporation
StatusCANCELLED
Thread DirectionRIGHT-HAND
MaterialSTEEL CORROSION RESISTING OVERALL
Nut Height0.178 INCHES NOMINAL IN
Thread Quantity Per Inch32
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.138 INCHES IN
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Width Across Flats0.314 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
Thread Class3B
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5310-00-169-609579NM-62 INTERCHANGEABLE
Nut,self-Locking,hexagon
Esna, Llc
5310-00-982-6813MS21044C06 INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-01-540-1146 INTERCHANGEABLE
Nut,self-Locking,hexagon
Cross-Reference Index
Part NumberManufacturer
75NM62 Harvard Industries Inc (USA)
298538P2 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
9621-21 PRIMARY Microwave Engineering Corporation (USA)
9621-21 Sierra Networks Inc Sierracom Div (USA)
79NM62 Harvard Industries Inc (USA)
79NM62 PRIMARY Esna, Llc (USA)
Related Parts
5310-00-169-6095INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
79NM-62
5310-00-982-6813INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS21044C06
5310-01-540-1146INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-061-8867?

NSN 5310-00-061-8867 is a Nut,self-Locking,hexagon, manufactured by Microwave Engineering Corporation, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-061-8867?

NSN 5310-00-061-8867 has 6 cross-referenced part numbers: 75NM62 (Harvard Industries Inc), 298538P2 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 9621-21 (Microwave Engineering Corporation), 9621-21 (Sierra Networks Inc Sierracom Div), 79NM62 (Harvard Industries Inc) and 1 more.

What NSN replaces 5310-00-061-8867?

There are 3 known substitutes for 5310-00-061-8867: 5310-00-169-6095, 5310-00-982-6813, 5310-01-540-1146. Verify interchangeability with system specifications before substitution.

What are the specifications of 9621-21?

Key specifications for 9621-21: Thread Direction: RIGHT-HAND; Material: STEEL CORROSION RESISTING OVERALL; Nut Height: 0.178 INCHES NOMINAL IN; Thread Quantity Per Inch: 32. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-061-8867 still in active supply?

NSN 5310-00-061-8867 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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