PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2-56X1-8Screw,machine

Alinabal Holdings Corporation Div Engineered Products Group · NSN 5305-00-591-3311 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-591-3311 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-591-3311. Primary manufacturer part number: 2-56X1-8.
Features
  • Screw,machine — FSC 5305
  • Head Style: FILLISTER
  • Screw Material Document and Classification: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE
  • Minimum Tensile Strength: 55000 POUNDS PER SQUARE INCH LBS
  • Thread Direction: RIGHT-HAND
  • Thread Class: 2A A
  • Fastener Length: 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
  • Head Diameter: 0.124 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-591-3311, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Alinabal Holdings Corporation Div Engineered Products Group. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-591-3311
Primary Part Number2-56X1-8
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerAlinabal Holdings Corporation Div Engineered Products Group
StatusACTIVE
Head StyleFILLISTER
Screw Material Document and ClassificationQQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE
Minimum Tensile Strength55000 POUNDS PER SQUARE INCH LBS
Thread DirectionRIGHT-HAND
Thread Class2A A
Fastener Length0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
Head Diameter0.124 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
Screw Surface TreatmentNICKEL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Head Height0.053 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
Nondefinitive Spec/std Data1 TYPE AND 4S STYLE
Internal Drive StyleCROSS RECESS TYPE 1
Thread Length0.089 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
Nominal Thread Diameter0.086 INCHES IN
Thread Quantity Per Inch56
Screw MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5305-00-151-3555BYRF517 INTERCHANGEABLE
Screw,machine
Ge Aviation Systems Llc Dba Ge Aviation Systems Llc
5305-01-103-39852-56X1-8 INTERCHANGEABLE
Screw,machine
All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners
Cross-Reference Index
Part NumberManufacturer
2-56X1-8 PRIMARY Alinabal Holdings Corporation Div Engineered Products Group (USA)
Related Parts
5305-00-151-3555INTERCHANGEABLE
SCREW,MACHINE
BYRF517
5305-01-103-3985INTERCHANGEABLE
SCREW,MACHINE
2-56X1-8

Frequently Asked Questions

What is NSN 5305-00-591-3311?

NSN 5305-00-591-3311 is a Screw,machine, manufactured by Alinabal Holdings Corporation Div Engineered Products Group, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-591-3311?

NSN 5305-00-591-3311 has 1 cross-referenced part number: 2-56X1-8 (Alinabal Holdings Corporation Div Engineered Products Group).

What NSN replaces 5305-00-591-3311?

There are 2 known substitutes for 5305-00-591-3311: 5305-00-151-3555, 5305-01-103-3985. Verify interchangeability with system specifications before substitution.

What are the specifications of 2-56X1-8?

Key specifications for 2-56X1-8: Head Style: FILLISTER; Screw Material Document and Classification: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE; Minimum Tensile Strength: 55000 POUNDS PER SQUARE INCH LBS; Thread Direction: RIGHT-HAND. 16 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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