PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-S-1222G TY1Nut,plain,hexagon

Naval Inventory Control Point Mechanicsburg · NSN 5310-01-244-6550 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-244-6550 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-244-6550. Primary manufacturer part number: MIL-S-1222G TY1.
Features
  • Nut,plain,hexagon — FSC 5310
  • Nut Style: HEXAGON
  • Bearing Surface Type: FLAT OR WASHER FACED
  • Nominal Thread Size: 0.375 INCHES IN
  • Criticality Code Justification: ZZZY
  • Thread Quantity Per Inch: 16
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Thread Class: 3A A
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 5310-01-244-6550, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN5310-01-244-6550
Primary Part NumberMIL-S-1222G TY1
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNaval Inventory Control Point Mechanicsburg
StatusACTIVE
Nut StyleHEXAGON
Bearing Surface TypeFLAT OR WASHER FACED
Nominal Thread Size0.375 INCHES IN
Criticality Code JustificationZZZY
Thread Quantity Per Inch16
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Thread Class3A A
Thread DirectionRIGHT-HAND
Material Document and Classification66 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL OVERALL
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS.
Nut Height0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
Surface TreatmentZINC OVERALL
Width Across Flats0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationASTM A 153 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-701-5786MS17828-6C INTERCHANGEABLE
Nut,self-Locking,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-01-064-2366 INTERCHANGEABLE
Nut,self-Locking,hexagon
5305-01-244-6543 INTERCHANGEABLE
Screw,cap,hexagon Head
5310-01-244-6546 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-6547 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-6548 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-6549 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-7565 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-7567 INTERCHANGEABLE
Nut,plain,hexagon
5310-01-244-7568 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
MIL-S-1222G TY1 Naval Inventory Control Point Mechanicsburg (USA)
3/8-16UNC-2B Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
5310-00-701-5786INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
MS17828-6C
5310-01-064-2366INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5305-01-244-6543INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5310-01-244-6546INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-6547INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-6548INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-6549INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-7565INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-7567INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-01-244-7568INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5305-01-244-8888INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5310-01-245-2590INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-01-244-6550?

NSN 5310-01-244-6550 is a Nut,plain,hexagon, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-244-6550?

NSN 5310-01-244-6550 has 2 cross-referenced part numbers: MIL-S-1222G TY1 (Naval Inventory Control Point Mechanicsburg), 3/8-16UNC-2B (Naval Inventory Control Point Mechanicsburg).

What NSN replaces 5310-01-244-6550?

There are 12 known substitutes for 5310-01-244-6550: 5310-00-701-5786, 5310-01-064-2366, 5305-01-244-6543 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-S-1222G TY1?

Key specifications for MIL-S-1222G TY1: Nut Style: HEXAGON; Bearing Surface Type: FLAT OR WASHER FACED; Nominal Thread Size: 0.375 INCHES IN; Criticality Code Justification: ZZZY. 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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