PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M1222RN10C244NANNScrew,cap,hexagon Head

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5305-01-494-6658 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-494-6658 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-494-6658. Primary manufacturer part number: M1222RN10C244NANN.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Nondefinitive Spec/std Data: 2 TYPE AND 400 GRADE
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Specification/standard Data: 81349-MIL-DTL-1222 GOVERNMENT SPECIFICATION
  • Thread Class: 2A A
  • Nominal Thread Diameter: 0.625 INCHES IN
  • Thread Direction: RIGHT-HAND
  • Thread Quantity Per Inch: 11
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-494-6658, is classified within Federal Supply Class 5305 (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 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-494-6658
Primary Part NumberM1222RN10C244NANN
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Nondefinitive Spec/std Data2 TYPE AND 400 GRADE
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Specification/standard Data81349-MIL-DTL-1222 GOVERNMENT SPECIFICATION
Thread Class2A A
Nominal Thread Diameter0.625 INCHES IN
Thread DirectionRIGHT-HAND
Thread Quantity Per Inch11
Fastener Length2.650 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5305-00-584-7947A024NICU INTERCHANGEABLE
Screw,cap,hexagon Head
Circor Naval Solutions Llc Dba Warren Pumps
5305-01-163-0413218002135 INTERCHANGEABLE
Screw,cap
Electric Boat Corporation Div General Dynamics Electric Boat
5305-01-302-5223 INTERCHANGEABLE
Screw,cap,hexagon Head
Cross-Reference Index
Part NumberManufacturer
M1222RN10C244NANN Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222 TYPE 1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
0.62511UNC2A2.750T1G400SSEA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
522C506-2131000 Northrop Grumman Systems Corporation Div Marine Systems (USA)
522C506-213 Northrop Grumman Systems Corporation Div Marine Systems (USA)
Related Parts
5305-00-584-7947INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
A024NICU
5305-01-163-0413INTERCHANGEABLE
SCREW,CAP
218002135
5305-01-302-5223INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5305-01-494-6658?

NSN 5305-01-494-6658 is a Screw,cap,hexagon Head, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-494-6658?

NSN 5305-01-494-6658 has 6 cross-referenced part numbers: M1222RN10C244NANN (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-1222 TYPE 1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 0.62511UNC2A2.750T1G400SSEA (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 522C506-2131000 (Northrop Grumman Systems Corporation Div Marine Systems) and 1 more.

What NSN replaces 5305-01-494-6658?

There are 3 known substitutes for 5305-01-494-6658: 5305-00-584-7947, 5305-01-163-0413, 5305-01-302-5223. Verify interchangeability with system specifications before substitution.

What are the specifications of M1222RN10C244NANN?

Key specifications for M1222RN10C244NANN: Nondefinitive Spec/std Data: 2 TYPE AND 400 GRADE; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Specification/standard Data: 81349-MIL-DTL-1222 GOVERNMENT SPECIFICATION; Thread Class: 2A A. 8 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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