PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31817Screw,machine

Fastenal Company Dba Fastenal Co · NSN 5305-01-589-6026 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-589-6026 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-589-6026. Primary manufacturer part number: 31817.
Features
  • Screw,machine — FSC 5305
  • Width Between Flats: 0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
  • Screw Surface Treatment: ZINC
  • Thread Direction: RIGHT-HAND
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Extended Washer Diameter: 0.398 INCHES MINIMUM AND 0.432 INCHES MAXIMUM IN
  • Head Surface Treatment Document and Classification: ASTM F1941, FE/ZN 3 AT ASSN STD SINGLE TREATMENT RESPONSE
  • Nominal Thread Diameter: 0.216 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-01-589-6026, 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 16 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-589-6026
Primary Part Number31817
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusACTIVE
Width Between Flats0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Screw Surface TreatmentZINC
Thread DirectionRIGHT-HAND
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Extended Washer Diameter0.398 INCHES MINIMUM AND 0.432 INCHES MAXIMUM IN
Head Surface Treatment Document and ClassificationASTM F1941, FE/ZN 3 AT ASSN STD SINGLE TREATMENT RESPONSE
Nominal Thread Diameter0.216 INCHES IN
Head StyleHEXAGON EXTENDED WASHER
Extended Washer Thickness0.022 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
Thread Quantity Per Inch14
Screw Surface Treatment Document and ClassificationASTM F1941, FE/ZN 3 AT ASSN STD SINGLE TREATMENT RESPONSE
Fastener Length0.750 INCHES NOMINAL IN
Thread Length0.750 INCHES NOMINAL IN
Screw MaterialSTEEL
Head Surface TreatmentZINC
Head Height0.139 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5935-00-259-3880UG447U INTERCHANGEABLE
Connector,receptacle,electrical
Joint Electronics Type Designation System
3455-00-268-9506B842 INTERCHANGEABLE
Cutter,milling,screw Slotting
F & D Tool Co Inc
5935-00-665-6099 INTERCHANGEABLE
Connector,receptacle,electrical
4320-00-709-6108331821 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
5120-01-348-02415120013480241 INTERCHANGEABLE
Wrench Set,spanner
General Services Administration Federal Supply Service
4730-01-441-649531817 INTERCHANGEABLE
Packing Nut
Evoqua Water Technologies Llc
Cross-Reference Index
Part NumberManufacturer
31817 PRIMARY Fastenal Company Dba Fastenal Co (USA)
12759-01038 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
5935-00-259-3880INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
UG447U
3455-00-268-9506INTERCHANGEABLE
CUTTER,MILLING,SCREW SLOTTING
B842
5935-00-665-6099INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
4320-00-709-6108INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
331821
5120-01-348-0241INTERCHANGEABLE
WRENCH SET,SPANNER
5120013480241
4730-01-441-6495INTERCHANGEABLE
PACKING NUT
31817

Frequently Asked Questions

What is NSN 5305-01-589-6026?

NSN 5305-01-589-6026 is a Screw,machine, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-589-6026?

NSN 5305-01-589-6026 has 2 cross-referenced part numbers: 31817 (Fastenal Company Dba Fastenal Co), 12759-01038 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5305-01-589-6026?

There are 6 known substitutes for 5305-01-589-6026: 5935-00-259-3880, 3455-00-268-9506, 5935-00-665-6099 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31817?

Key specifications for 31817: Width Between Flats: 0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Screw Surface Treatment: ZINC; Thread Direction: RIGHT-HAND; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC). 18 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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