PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-1222 TYI GR400Screw,cap,hexagon Head

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5305-01-658-8597 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-658-8597 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-658-8597. Primary manufacturer part number: MIL-DTL-1222 TYI GR400.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Fastener Length: 1.50 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 14
  • Head Style: HEXAGON
  • Nominal Thread Diameter: 0.438 INCHES IN
  • Thread Class: 2A A
  • Thread Direction: RIGHT-HAND
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Nickel Alloy and Copper Alloy Overall construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-658-8597, 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 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-658-8597
Primary Part NumberMIL-DTL-1222 TYI GR400
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
Fastener Length1.50 INCHES NOMINAL IN
Thread Quantity Per Inch14
Head StyleHEXAGON
Nominal Thread Diameter0.438 INCHES IN
Thread Class2A A
Thread DirectionRIGHT-HAND
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
MaterialNICKEL ALLOY AND COPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5305-01-041-2832 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-270-6169 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-336-5931 INTERCHANGEABLE
Screw,cap,hexagon Head
5310-01-658-5403709-8500410 ITEM 01-4 INTERCHANGEABLE
Nut,plain,hexagon
Naval Sea Systems Command
5310-01-677-9671 INTERCHANGEABLE
Nut,self-Locking,hexagon
5305-01-682-1665M1222RN8C240NANN INTERCHANGEABLE
Screw,cap,hexagon Head
Naval Sea Systems Command
5305-01-693-0610 INTERCHANGEABLE
Screw,cap,hexagon Head
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-1222 TYI GR400 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
0.438-14UNC-2AX1.50 NICU Naval Sea Systems Command (USA)
709-8500410 ITEM 01-5 Naval Sea Systems Command (USA)
Related Parts
5305-01-041-2832INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-270-6169INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-336-5931INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5310-01-658-5403INTERCHANGEABLE
NUT,PLAIN,HEXAGON
709-8500410 ITEM 01-4
5310-01-677-9671INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5305-01-682-1665INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
M1222RN8C240NANN
5305-01-693-0610INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5305-01-658-8597?

NSN 5305-01-658-8597 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 5305-01-658-8597?

NSN 5305-01-658-8597 has 3 cross-referenced part numbers: MIL-DTL-1222 TYI GR400 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 0.438-14UNC-2AX1.50 NICU (Naval Sea Systems Command), 709-8500410 ITEM 01-5 (Naval Sea Systems Command).

What NSN replaces 5305-01-658-8597?

There are 7 known substitutes for 5305-01-658-8597: 5305-01-041-2832, 5305-01-270-6169, 5305-01-336-5931 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-1222 TYI GR400?

Key specifications for MIL-DTL-1222 TYI GR400: Fastener Length: 1.50 INCHES NOMINAL IN; Thread Quantity Per Inch: 14; Head Style: HEXAGON; End Item Identification: HYDRAULIC SYS. 9 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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