PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1258Screw,machine

Telemechanics Inc · NSN 5305-00-639-8609 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-639-8609 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-639-8609. Primary manufacturer part number: 1258.
Features
  • Screw,machine — FSC 5305
  • Screw Surface Treatment: NICKEL
  • Internal Drive Style: SLOT
  • Thread Class: 3A A
  • Thread Quantity Per Inch: 32
  • Nominal Thread Diameter: 0.190 INCHES IN
  • Fastener Length: 1.375 INCHES NOMINAL IN
  • Head Style: FILLISTER
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-639-8609, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-639-8609
Primary Part Number1258
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerTelemechanics Inc
StatusCANCELLED
Screw Surface TreatmentNICKEL
Internal Drive StyleSLOT
Thread Class3A A
Thread Quantity Per Inch32
Nominal Thread Diameter0.190 INCHES IN
Fastener Length1.375 INCHES NOMINAL IN
Head StyleFILLISTER
Head Diameter0.303 INCHES NOMINAL IN
Screw MaterialSTEEL
Thread Series DesignatorUNF
Head Height0.164 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Thread Length1.250 INCHES MINIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5960-00-004-195910632 INTERCHANGEABLE
Electron Tube
Olympus America Inc
5962-00-186-85152868541-1 INTERCHANGEABLE
Microcircuit,linear
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5120-00-203-48001258 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5977-00-239-4090 INTERCHANGEABLE
Brush,electrical Contact
5960-00-262-0189 INTERCHANGEABLE
Electron Tube
2940-00-497-633351258 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
2805-00-517-9909 INTERCHANGEABLE
Valve,poppet,engine
5340-00-680-8889 INTERCHANGEABLE
Handle,bow
5325-00-835-601211860 INTERCHANGEABLE
Ring,retaining
Paragon Power Inc Sub of Great Lakes Power Products Inc
5340-01-067-5089DEI-1258 INTERCHANGEABLE
Retainer,helical Compression Spr
Down East, Inc.
Cross-Reference Index
Part NumberManufacturer
1258 PRIMARY Telemechanics Inc (USA)
1258 At and T Corp (USA)
Related Parts
5960-00-004-1959INTERCHANGEABLE
ELECTRON TUBE
10632
5962-00-186-8515INTERCHANGEABLE
MICROCIRCUIT,LINEAR
2868541-1
5120-00-203-4800INTERCHANGEABLE
WRENCH,OPEN END
1258
5977-00-239-4090INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
5960-00-262-0189INTERCHANGEABLE
ELECTRON TUBE
2940-00-497-6333INTERCHANGEABLE
FILTER ELEMENT,FLUID
51258
2805-00-517-9909INTERCHANGEABLE
VALVE,POPPET,ENGINE
5340-00-680-8889INTERCHANGEABLE
HANDLE,BOW
5325-00-835-6012INTERCHANGEABLE
RING,RETAINING
11860
5340-01-067-5089INTERCHANGEABLE
RETAINER,HELICAL COMPRESSION SPR
DEI-1258
5965-01-072-8567INTERCHANGEABLE
HEADSET,ELECTRICAL
1468-7058
6625-01-110-5813INTERCHANGEABLE
HOLDER
125-8

Frequently Asked Questions

What is NSN 5305-00-639-8609?

NSN 5305-00-639-8609 is a Screw,machine, manufactured by Telemechanics Inc, classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-00-639-8609?

NSN 5305-00-639-8609 has 2 cross-referenced part numbers: 1258 (Telemechanics Inc), 1258 (At and T Corp).

What NSN replaces 5305-00-639-8609?

There are 12 known substitutes for 5305-00-639-8609: 5960-00-004-1959, 5962-00-186-8515, 5120-00-203-4800 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1258?

Key specifications for 1258: Screw Surface Treatment: NICKEL; Internal Drive Style: SLOT; Thread Class: 3A A; Thread Quantity Per Inch: 32. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-639-8609 still in active supply?

NSN 5305-00-639-8609 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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