PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40258Screw,cap,socket Head

Naval Inventory Control Point Mechanicsburg · NSN 5305-01-242-6303 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-242-6303 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-242-6303. Primary manufacturer part number: 40258.
Features
  • Screw,cap,socket Head — FSC 5305
  • Fastener Length: 0.250 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 40
  • Nominal Thread Diameter: 0.125 INCHES IN
  • 1 verified cross-reference
  • Primary manufacturer: Naval Inventory Control Point Mechanicsburg
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-242-6303, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 3 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-242-6303
Primary Part Number40258
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNaval Inventory Control Point Mechanicsburg
StatusACTIVE
Fastener Length0.250 INCHES NOMINAL IN
Thread Quantity Per Inch40
Nominal Thread Diameter0.125 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
2990-00-153-7271441594C1 INTERCHANGEABLE
Pipe,exhaust
Navistar Intl Corp Truck Br Ohio Plant
5325-00-200-7377 INTERCHANGEABLE
Ring,retaining
5961-00-577-30232N270 INTERCHANGEABLE
Transistor
New Jersey Semiconductor Products Inc Eagle Electronics Div
5950-01-028-6664SM-C-542756 INTERCHANGEABLE
Transformer,power
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5325-01-267-980040258 INTERCHANGEABLE
Ring,retaining
L & R Manufacturing Company
5998-01-429-892340258 INTERCHANGEABLE
Printed Wiring Board
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
4320-01-465-4963 INTERCHANGEABLE
Motor,hydraulic
5310-01-556-681540258 INTERCHANGEABLE
Washer,lock
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
40258 PRIMARY Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
2990-00-153-7271INTERCHANGEABLE
PIPE,EXHAUST
441594C1
5325-00-200-7377INTERCHANGEABLE
RING,RETAINING
5961-00-577-3023INTERCHANGEABLE
TRANSISTOR
2N270
5950-01-028-6664INTERCHANGEABLE
TRANSFORMER,POWER
SM-C-542756
5325-01-267-9800INTERCHANGEABLE
RING,RETAINING
40258
5998-01-429-8923INTERCHANGEABLE
PRINTED WIRING BOARD
40258
4320-01-465-4963INTERCHANGEABLE
MOTOR,HYDRAULIC
5310-01-556-6815INTERCHANGEABLE
WASHER,LOCK
40258

Frequently Asked Questions

What is NSN 5305-01-242-6303?

NSN 5305-01-242-6303 is a Screw,cap,socket Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-242-6303?

NSN 5305-01-242-6303 has 1 cross-referenced part number: 40258 (Naval Inventory Control Point Mechanicsburg).

What NSN replaces 5305-01-242-6303?

There are 8 known substitutes for 5305-01-242-6303: 2990-00-153-7271, 5325-00-200-7377, 5961-00-577-3023 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40258?

Key specifications for 40258: Part Name Assigned by Controlling Agency: NAVY SPECIAL PROJECT; Fastener Length: 0.250 INCHES NOMINAL IN; Thread Quantity Per Inch: 40; Nominal Thread Diameter: 0.125 INCHES IN. 4 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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