PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

709-8540939 ITEM 021-2Nut,self-Locking,hexagon

Naval Sea Systems Command · NSN 5310-01-677-9671 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-677-9671 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-677-9671. Primary manufacturer part number: 709-8540939 ITEM 021-2.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • 6 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-677-9671, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameNut,self-Locking,hexagon
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersNaval Sea Systems Command (CAGE 53711); Naval Inventory Control Point Mechanicsburg (CAGE 03950); Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M (CAGE 81349)
Technical Specifications
ParameterValue
NSN5310-01-677-9671
Primary Part Number709-8540939 ITEM 021-2
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5305-01-041-2832 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-270-6169 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-336-5931 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-658-8597 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-682-1665M1222RN8C240NANN INTERCHANGEABLE
Screw,cap,hexagon Head
Naval Sea Systems Command
5305-01-693-0610 INTERCHANGEABLE
Screw,cap,hexagon Head
Cross-Reference Index
Part NumberManufacturer
709-8540939 ITEM 021-2 Naval Sea Systems Command (USA)
0.750-10UNC-2B NICUD4 Naval Inventory Control Point Mechanicsburg (USA)
0.750-10UNC-2B NICU Naval Sea Systems Command (USA)
709-8540939 ITEM 021-2D4 Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222 TYI GR400 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222 TYI GR400D4 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
5305-01-041-2832INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-270-6169INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-336-5931INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-658-8597INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-682-1665INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
M1222RN8C240NANN
5305-01-693-0610INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5310-01-677-9671?

NSN 5310-01-677-9671 is a Nut,self-Locking,hexagon, manufactured by Naval Sea Systems Command, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-677-9671?

NSN 5310-01-677-9671 has 6 cross-referenced part numbers: 709-8540939 ITEM 021-2 (Naval Sea Systems Command), 0.750-10UNC-2B NICUD4 (Naval Inventory Control Point Mechanicsburg), 0.750-10UNC-2B NICU (Naval Sea Systems Command), 709-8540939 ITEM 021-2D4 (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222 TYI GR400 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 5310-01-677-9671?

There are 6 known substitutes for 5310-01-677-9671: 5305-01-041-2832, 5305-01-270-6169, 5305-01-336-5931 and 3 more. Verify interchangeability with system specifications before substitution.

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