PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-S-1222Nut,plain,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-321-2418 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-321-2418 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-321-2418. Primary manufacturer part number: MIL-S-1222.
Features
  • Nut,plain,hexagon — FSC 5310
  • Departure From Cited Designator: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • Criticality Code Justification: ZZZX
  • 3 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-321-2418, 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 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-321-2418
Primary Part NumberMIL-S-1222
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Departure From Cited DesignatorMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Criticality Code JustificationZZZX
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5310-01-038-0376 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-112-0299 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-113-8266 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-147-3725 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-147-3727 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-153-0801 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-202-3427 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-6547 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
MIL-S-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
000.750-10UNC-2B Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-01-038-0376INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-112-0299INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-113-8266INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-147-3725INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-147-3727INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-153-0801INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-202-3427INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-6547INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-321-2418?

NSN 5310-00-321-2418 is a Nut,plain,hexagon, 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 5310-00-321-2418?

NSN 5310-00-321-2418 has 3 cross-referenced part numbers: MIL-S-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 000.750-10UNC-2B (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-321-2418?

There are 8 known substitutes for 5310-00-321-2418: 5310-01-038-0376, 5310-01-112-0299, 5310-01-113-8266 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-S-1222?

Key specifications for MIL-S-1222: Departure From Cited Designator: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.; Criticality Code Justification: ZZZX. 2 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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