PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

38523Screw,cap,hexagon Head

Fastenal Company Dba Fastenal Co · NSN 5305-01-588-9299 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-588-9299 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-588-9299. Primary manufacturer part number: 38523.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Head Style: HEXAGON
  • Head Height: 2.7 MILLIMETERS MINIMUM AND 2.9 MILLIMETERS MAXIMUM MM
  • Thread Series Designator: M
  • Surface Treatment: ZINC OVERALL
  • External Thread Tolerance Class: 6G G
  • Nominal Thread Diameter: 4.0 MILLIMETERS MM
  • Thread Pitch in Millimeters: 0.7
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Property Class 8.8 Overall construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-588-9299, 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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, 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
NSN5305-01-588-9299
Primary Part Number38523
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusACTIVE
Head StyleHEXAGON
Head Height2.7 MILLIMETERS MINIMUM AND 2.9 MILLIMETERS MAXIMUM MM
Thread Series DesignatorM
Surface TreatmentZINC OVERALL
External Thread Tolerance Class6G G
Nominal Thread Diameter4.0 MILLIMETERS MM
Thread Pitch in Millimeters0.7
MaterialSTEEL PROPERTY CLASS 8.8 OVERALL
Width Between Flats6.8 MILLIMETERS MINIMUM AND 7.0 MILLIMETERS MAXIMUM MM
Thread Length11.7 MILLIMETERS MINIMUM AND 12.4 MILLIMETERS MAXIMUM MM
Thread DirectionRIGHT-HAND
Fastener Length11.7 MILLIMETERS MINIMUM AND 12.4 MILLIMETERS MAXIMUM MM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5306-00-937-015038523 INTERCHANGEABLE
Bolt,pump
Eaton Aerospace, Llc Dba Jackson South
4710-01-119-482799138523 INTERCHANGEABLE
Tube,metallic
Alfa Laval Inc
5950-01-161-8198 INTERCHANGEABLE
Coil,radio Frequency
5307-01-373-045538523 INTERCHANGEABLE
Stud,plain
Jergens Inc Div Tooling Components Division
6625-01-373-5898 INTERCHANGEABLE
Test Set,electronic Systems
4320-01-533-30043011004 INTERCHANGEABLE
Impeller,pump,centrifugal
Sims Pump Valve Co, Inc
Cross-Reference Index
Part NumberManufacturer
3011004 General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (USA)
38523 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
5306-00-937-0150INTERCHANGEABLE
BOLT,PUMP
38523
4710-01-119-4827INTERCHANGEABLE
TUBE,METALLIC
99138523
5950-01-161-8198INTERCHANGEABLE
COIL,RADIO FREQUENCY
5307-01-373-0455INTERCHANGEABLE
STUD,PLAIN
38523
6625-01-373-5898INTERCHANGEABLE
TEST SET,ELECTRONIC SYSTEMS
4320-01-533-3004INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
3011004

Frequently Asked Questions

What is NSN 5305-01-588-9299?

NSN 5305-01-588-9299 is a Screw,cap,hexagon Head, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-588-9299?

NSN 5305-01-588-9299 has 2 cross-referenced part numbers: 3011004 (General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp), 38523 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5305-01-588-9299?

There are 6 known substitutes for 5305-01-588-9299: 5306-00-937-0150, 4710-01-119-4827, 5950-01-161-8198 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 38523?

Key specifications for 38523: Head Style: HEXAGON; Head Height: 2.7 MILLIMETERS MINIMUM AND 2.9 MILLIMETERS MAXIMUM MM; Thread Series Designator: M; Surface Treatment: ZINC OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com