PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

240497Bolt,externally Relieved Body

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5306-00-638-4965 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-638-4965 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-638-4965. Primary manufacturer part number: 240497.
Features
  • Bolt,externally Relieved Body — FSC 5306
  • Thread Length: 0.990 INCHES MINIMUM IN
  • Distance From Largest Bearing Surface of Head to End of Second Diameter: 0.300 INCHES NOMINAL IN
  • Head Height: 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
  • Nonstandard Thread Pitch Diameter: +0.2800 TO 0.2824 INCHES IN
  • Material Document and Classification: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: IRON ALLOY 660 OVERALL
  • Distance From Centerline to Flat: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Iron Alloy 660 Overall construction
General Description

The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-638-4965, 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 21 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5306-00-638-4965
Primary Part Number240497
Item NameBolt,externally Relieved Body
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusCANCELLED
Thread Length0.990 INCHES MINIMUM IN
Distance From Largest Bearing Surface of Head to End of Second Diameter0.300 INCHES NOMINAL IN
Head Height0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
Nonstandard Thread Pitch Diameter+0.2800 TO 0.2824 INCHES IN
Material Document and ClassificationAMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialIRON ALLOY 660 OVERALL
Distance From Centerline to Flat0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
Minimum Tensile Strength130000 POUNDS PER SQUARE INCH LBS
Externally Relieved Body Diameter Quantity3
First Diameter From Head0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Thread Series DesignatorUNF
Distance From Largest Bearing Surface of Head to End of First Diameter0.220 INCHES NOMINAL IN
Third Diameter From Head0.310 INCHES NOMINAL IN
Head Diameter0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
Thread Quantity Per Inch24
Distance From Largest Bearing Surface of Head to End of Third Diameter0.510 INCHES NOMINAL IN
Head StyleDEE CHAMFER
Second Diameter From Head0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
Fastener Length1.500 INCHES NOMINAL IN
Nominal Thread Diameter0.312 INCHES IN
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
No Item Name Available
5325-01-497-0030 INTERCHANGEABLE
Ring,retaining
Cross-Reference Index
Part NumberManufacturer
240497 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5306-00-303-9146SUCCESSOR
NO ITEM NAME AVAILABLE
5325-01-497-0030INTERCHANGEABLE
RING,RETAINING

Frequently Asked Questions

What is NSN 5306-00-638-4965?

NSN 5306-00-638-4965 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-638-4965?

NSN 5306-00-638-4965 has 1 cross-referenced part number: 240497 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 5306-00-638-4965?

There are 2 known substitutes for 5306-00-638-4965: 5306-00-303-9146, 5325-01-497-0030. Verify interchangeability with system specifications before substitution.

What are the specifications of 240497?

Key specifications for 240497: Thread Length: 0.990 INCHES MINIMUM IN; Distance From Largest Bearing Surface of Head to End of Second Diameter: 0.300 INCHES NOMINAL IN; Head Height: 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN; Nonstandard Thread Pitch Diameter: +0.2800 TO 0.2824 INCHES IN. 21 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-638-4965 still in active supply?

NSN 5306-00-638-4965 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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