PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

139385Screw,machine

Telemechanics Inc · NSN 5305-00-903-5523 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-903-5523 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-903-5523. Primary manufacturer part number: 139385.
Features
  • Screw,machine — FSC 5305
  • Nominal Thread Diameter: 0.099 INCHES IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Screw Material: STEEL CORROSION RESISTING
  • Thread Class: 2A A
  • Internal Drive Style: SLOT
  • Thread Direction: RIGHT-HAND
  • Head Style: FLAT COUNTERSUNK
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-903-5523, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Telemechanics Inc. Government technical data includes 13 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-903-5523
Primary Part Number139385
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerTelemechanics Inc
StatusACTIVE
Nominal Thread Diameter0.099 INCHES IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Screw MaterialSTEEL CORROSION RESISTING
Thread Class2A A
Internal Drive StyleSLOT
Thread DirectionRIGHT-HAND
Head StyleFLAT COUNTERSUNK
Screw Surface TreatmentPASSIVATE
Countersink Angle82.0 DEGREES NOMINAL
Thread Quantity Per Inch48
Thread Length0.250 INCHES MINIMUM IN
Fastener Length0.822 INCHES NOMINAL IN
Head Diameter0.186 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6685-00-840-6191139385 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
Cross-Reference Index
Part NumberManufacturer
139385 PRIMARY Telemechanics Inc (USA)
139385 American Telephone and Telegraph Co (USA)
Related Parts
6685-00-840-6191INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
139385

Frequently Asked Questions

What is NSN 5305-00-903-5523?

NSN 5305-00-903-5523 is a Screw,machine, manufactured by Telemechanics Inc, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-903-5523?

NSN 5305-00-903-5523 has 2 cross-referenced part numbers: 139385 (Telemechanics Inc), 139385 (American Telephone and Telegraph Co).

What NSN replaces 5305-00-903-5523?

There is 1 known substitute for 5305-00-903-5523: 6685-00-840-6191. Verify interchangeability with system specifications before substitution.

What are the specifications of 139385?

Key specifications for 139385: Nominal Thread Diameter: 0.099 INCHES IN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Screw Material: STEEL CORROSION RESISTING; Thread Class: 2A A. 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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