PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-1222Nut,plain,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-01-038-0376 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-038-0376 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-038-0376. Primary manufacturer part number: MIL-DTL-1222.
Features
  • Nut,plain,hexagon — FSC 5310
  • Departure From Cited Document: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • Nut Style: HEXAGON
  • Thread Direction: RIGHT-HAND
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Features Provided: CASEHARDENED
  • Bearing Surface Type: WASHER FACED
  • Thread Quantity Per Inch: 10
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Nickel Alloy 400 or Nickel Alloy R-405 Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-038-0376, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-038-0376
Primary Part NumberMIL-DTL-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 DocumentMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Nut StyleHEXAGON
Thread DirectionRIGHT-HAND
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Features ProvidedCASEHARDENED
Bearing Surface TypeWASHER FACED
Thread Quantity Per Inch10
Nominal Thread Size0.750 INCHES IN
Criticality Code JustificationZZZW
Nondefinitive Spec/std DataA STYLE AND 1 TYPE
Thread Class2B
Width Across Flats1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
Nut Height0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
Material Document and ClassificationQQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
MaterialNICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-321-2418 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-037-3425 INTERCHANGEABLE
Nut,plain,hexagon
5306-01-038-0329 INTERCHANGEABLE
Bolt,machine
5310-01-038-0374 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-038-0375 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-111-5215 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-111-7113 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-112-0299 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-112-0303 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-113-8266 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
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-S-1222/QQ-N-281 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
5310-00-321-2418INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-037-3425INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5306-01-038-0329INTERCHANGEABLE
BOLT,MACHINE
5310-01-038-0374INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-038-0375INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-111-5215INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-111-7113INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-112-0299INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-112-0303INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-113-8266INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-147-3725INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-147-3726INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-01-038-0376?

NSN 5310-01-038-0376 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 5310-01-038-0376?

NSN 5310-01-038-0376 has 4 cross-referenced part numbers: MIL-DTL-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 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-S-1222/QQ-N-281 (Naval Inventory Control Point Mechanicsburg).

What NSN replaces 5310-01-038-0376?

There are 12 known substitutes for 5310-01-038-0376: 5310-00-321-2418, 5310-01-037-3425, 5306-01-038-0329 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-1222?

Key specifications for MIL-DTL-1222: Departure From Cited Document: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.; Nut Style: HEXAGON; Thread Direction: RIGHT-HAND; Thread Series: UNIFIED NATIONAL COARSE (UNC). 15 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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