PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

26188Screw,shoulder

Fastenal Company Dba Fastenal Co · NSN 5305-01-598-6459 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-598-6459 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-598-6459. Primary manufacturer part number: 26188.
Features
  • Screw,shoulder — FSC 5305
  • Thread Direction: RIGHT-HAND
  • Head Style: FLAT FILLISTER
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Internal Drive Style: HEXAGON
  • Thread Quantity Per Inch: 20
  • Shoulder Length: 0.3125 INCHES NOMINAL OVERALL IN
  • Nominal Thread Diameter: 0.250 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,shoulder, cataloged under National Stock Number 5305-01-598-6459, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 10 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-598-6459
Primary Part Number26188
Item NameScrew,shoulder
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusACTIVE
Thread DirectionRIGHT-HAND
Head StyleFLAT FILLISTER
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Internal Drive StyleHEXAGON
Thread Quantity Per Inch20
Shoulder Length0.3125 INCHES NOMINAL OVERALL IN
Nominal Thread Diameter0.250 INCHES IN
MaterialSTEEL OVERALL
Shoulder ShapeROUND OVERALL
Width Across Flats0.1562 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5985-00-145-34792-6188 INTERCHANGEABLE
Mixer,crystal,coaxial
Spectrum Microwave, Inc.
5985-01-223-898211442257-2 INTERCHANGEABLE
Coupler,directional
Us Army Aviation and Missile Command
5120-01-440-6982TL-685 INTERCHANGEABLE
Inserter and Remover,pneumatic T
Myers Tire Supply Distribution Inc Div Akron Branch
1240-01-542-708826188 INTERCHANGEABLE
Shroud Wrap,coupler
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
26188 PRIMARY Fastenal Company Dba Fastenal Co (USA)
12759-01259 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
5985-00-145-3479INTERCHANGEABLE
MIXER,CRYSTAL,COAXIAL
2-6188
5985-01-223-8982INTERCHANGEABLE
COUPLER,DIRECTIONAL
11442257-2
5120-01-440-6982INTERCHANGEABLE
INSERTER AND REMOVER,PNEUMATIC T
TL-685
1240-01-542-7088INTERCHANGEABLE
SHROUD WRAP,COUPLER
26188

Frequently Asked Questions

What is NSN 5305-01-598-6459?

NSN 5305-01-598-6459 is a Screw,shoulder, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-598-6459?

NSN 5305-01-598-6459 has 2 cross-referenced part numbers: 26188 (Fastenal Company Dba Fastenal Co), 12759-01259 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5305-01-598-6459?

There are 4 known substitutes for 5305-01-598-6459: 5985-00-145-3479, 5985-01-223-8982, 5120-01-440-6982 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 26188?

Key specifications for 26188: Thread Direction: RIGHT-HAND; Head Style: FLAT FILLISTER; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Internal Drive Style: HEXAGON. 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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