PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-1222 TYPE IIScrew,cap,hexagon Head

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5305-01-426-3158 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-426-3158 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-426-3158. Primary manufacturer part number: MIL-DTL-1222 TYPE II.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Thread Class: 3A A
  • Thread Quantity Per Inch: 10
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Material: PLASTIC POLYAMIDE NYLON LOCKING FEATURE
  • Material: STEEL OVERALL
  • Width Between Flats: 1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
  • Nominal Thread Diameter: 0.750 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Plastic Polyamide Nylon Locking Feature construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-426-3158, 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 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-426-3158
Primary Part NumberMIL-DTL-1222 TYPE II
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
Thread Class3A A
Thread Quantity Per Inch10
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
MaterialPLASTIC POLYAMIDE NYLON LOCKING FEATURE
MaterialSTEEL OVERALL
Width Between Flats1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
Nominal Thread Diameter0.750 INCHES IN
Locking FeaturePATCH OR PELLET OR STRIP THREADS
Fastener Length2.000 INCHES NOMINAL IN
Thread Length1.750 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Head Height0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
Head StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5305-01-339-9560 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-406-8548 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-423-8881 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-425-7874 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-429-5654 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-544-9792 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-545-0118 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-545-0168 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-642-0502 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-657-0405 INTERCHANGEABLE
Screw,cap,hexagon Head
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-1222 TYPE II Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
0.75010UNC3A2.000T2G4340SEB American National Standards Institute Incorporated Dba American National Standards Institute (USA)
0.75010UNC3A2.0 00TIIG4340SEB Zf Industrieantriebe Witten Gmbh (DEU)
0.750-10UNC-3AX 2.00STLFSLFLKG Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
5305-01-339-9560INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-406-8548INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-423-8881INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-425-7874INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-429-5654INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-544-9792INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-545-0118INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-545-0168INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-642-0502INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-657-0405INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5305-01-426-3158?

NSN 5305-01-426-3158 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 5305-01-426-3158?

NSN 5305-01-426-3158 has 4 cross-referenced part numbers: MIL-DTL-1222 TYPE II (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 0.75010UNC3A2.000T2G4340SEB (American National Standards Institute Incorporated Dba American National Standards Institute), 0.75010UNC3A2.0 00TIIG4340SEB (Zf Industrieantriebe Witten Gmbh), 0.750-10UNC-3AX 2.00STLFSLFLKG (Zf Industrieantriebe Witten Gmbh).

What NSN replaces 5305-01-426-3158?

There are 10 known substitutes for 5305-01-426-3158: 5305-01-339-9560, 5305-01-406-8548, 5305-01-423-8881 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-1222 TYPE II?

Key specifications for MIL-DTL-1222 TYPE II: Thread Class: 3A A; Thread Quantity Per Inch: 10; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Material: PLASTIC POLYAMIDE NYLON LOCKING FEATURE. 13 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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