PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-1222,TYIII,GR4,STYANut,plain,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-01-045-1608 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-045-1608 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-045-1608. Primary manufacturer part number: MIL-DTL-1222,TYIII,GR4,STYA.
Features
  • Nut,plain,hexagon — FSC 5310
  • Departure From Cited Document: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
  • Criticality Code Justification: ZZZW
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Thread Quantity Per Inch: 8
  • Nominal Thread Size: 1.250 INCHES IN
  • Thread Class: 2B
  • Material: STEEL OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-045-1608, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-045-1608
Primary Part NumberMIL-DTL-1222,TYIII,GR4,STYA
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 DocumentQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
Criticality Code JustificationZZZW
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Thread Quantity Per Inch8
Nominal Thread Size1.250 INCHES IN
Thread Class2B
MaterialSTEEL OVERALL
Nut StyleHEXAGON
Width Across Flats1.334 INCHES NOMINAL IN
Nut Height1.062 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-145-200222600N PIECE 38 INTERCHANGEABLE
Nut,plain,hexagon
Leslie Controls, Inc. Dba Leslie Controls Inc
5310-00-458-0465 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-041-2866 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-143-1552 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-383-3376 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-1222,TYIII,GR4,STYA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILS1222TYIIIGR4 11/4 8UN Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222,TYIII,GR4,STYAL1 Naval Inventory Control Point Mechanicsburg (USA)
TY III,GR 4,STYA1 1/4-8UNC-2BL1 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
MIL-DTL-1222L1 Naval Inventory Control Point Mechanicsburg (USA)
MILS1222TYIIIGR4 11/4 8UNL1 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
5310-00-145-2002INTERCHANGEABLE
NUT,PLAIN,HEXAGON
22600N PIECE 38
5310-00-458-0465INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-041-2866INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-143-1552INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-383-3376INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-01-045-1608?

NSN 5310-01-045-1608 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 5310-01-045-1608?

NSN 5310-01-045-1608 has 7 cross-referenced part numbers: MIL-DTL-1222,TYIII,GR4,STYA (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILS1222TYIIIGR4 11/4 8UN (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-1222,TYIII,GR4,STYAL1 (Naval Inventory Control Point Mechanicsburg), TY III,GR 4,STYA1 1/4-8UNC-2BL1 (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 2 more.

What NSN replaces 5310-01-045-1608?

There are 5 known substitutes for 5310-01-045-1608: 5310-00-145-2002, 5310-00-458-0465, 5310-01-041-2866 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-1222,TYIII,GR4,STYA?

Key specifications for MIL-DTL-1222,TYIII,GR4,STYA: Departure From Cited Document: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS; Criticality Code Justification: ZZZW; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Quantity Per Inch: 8. 11 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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