PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

490190Bolt,machine

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5306-00-941-0121 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-941-0121 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-941-0121. Primary manufacturer part number: 490190.
Features
  • Bolt,machine — FSC 5306
  • Head Style: DOUBLE HEXAGON W/HOLE
  • Thread Class: 3A A
  • Fastener Length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
  • Features Provided: FINISHED HEAD
  • Extended Washer Thickness: 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
  • Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF)
  • Nominal Thread Diameter: 0.250 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-941-0121, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 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
NSN5306-00-941-0121
Primary Part Number490190
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Head StyleDOUBLE HEXAGON W/HOLE
Thread Class3A A
Fastener Length0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
Features ProvidedFINISHED HEAD
Extended Washer Thickness0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF)
Nominal Thread Diameter0.250 INCHES IN
Thread DirectionRIGHT-HAND
Head Height0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN
Surface Finish63.0 MICROINCHES BEARING SURFACE OF HEAD
Thread Quantity Per Inch28
MaterialSTEEL CORROSION RESISTING OVERALL
Surface Finish32.0 MICROINCHES THREADS
Width Between Flats0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
Extended Washer Diameter0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
Hardness Rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
Material Document and ClassificationAMS5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread Length0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-287-0706SAE J530 4-2 130138B INTERCHANGEABLE
Reducer,pipe
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
490190 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
490190 Howmet Global Fastening Systems Inc Div Torrance Operations (USA)
490190 Turbo Power & Marine System Inc Sub of United Technologies Corp (USA)
490190 Valco Co Government Sales Office (USA)
490190 Textron Fastening Systems Dba Decorah Operations Tfs (USA)
Related Parts
4730-00-287-0706INTERCHANGEABLE
REDUCER,PIPE
SAE J530 4-2 130138B

Frequently Asked Questions

What is NSN 5306-00-941-0121?

NSN 5306-00-941-0121 is a Bolt,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-941-0121?

NSN 5306-00-941-0121 has 5 cross-referenced part numbers: 490190 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 490190 (Howmet Global Fastening Systems Inc Div Torrance Operations), 490190 (Turbo Power & Marine System Inc Sub of United Technologies Corp), 490190 (Valco Co Government Sales Office), 490190 (Textron Fastening Systems Dba Decorah Operations Tfs).

What NSN replaces 5306-00-941-0121?

There is 1 known substitute for 5306-00-941-0121: 4730-00-287-0706. Verify interchangeability with system specifications before substitution.

What are the specifications of 490190?

Key specifications for 490190: Head Style: DOUBLE HEXAGON W/HOLE; Thread Class: 3A A; Fastener Length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN; Features Provided: FINISHED HEAD. 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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