PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

661BBolt,machine

Textron Lycoming Inc Williamsport Plant · NSN 5306-00-550-0702 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-550-0702 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-550-0702. Primary manufacturer part number: 661B.
Features
  • Bolt,machine — FSC 5306
  • Surface Treatment: CADMIUM OVERALL
  • Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Fastener Length: 1.030 INCHES NOMINAL IN
  • Head Height: 0.190 INCHES NOMINAL IN
  • Thread Length: 0.940 INCHES MINIMUM IN
  • Width Between Flats: 1.130 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 16
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1212 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-550-0702, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Textron Lycoming Inc Williamsport Plant. Government technical data includes 18 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
NSN5306-00-550-0702
Primary Part Number661B
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerTextron Lycoming Inc Williamsport Plant
StatusCANCELLED
Surface TreatmentCADMIUM OVERALL
Material Document and ClassificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Fastener Length1.030 INCHES NOMINAL IN
Head Height0.190 INCHES NOMINAL IN
Thread Length0.940 INCHES MINIMUM IN
Width Between Flats1.130 INCHES NOMINAL IN
Thread Quantity Per Inch16
Features ProvidedFINISHED HEAD
Head StyleHEXAGON
Thread Class3A A
Hole Diameter0.094 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Hole Configuration StyleHEXAGON LONGITUDINAL HOLE
Thread Series DesignatorUNF
MaterialSTEEL COMP 1212 OVERALL
Hole TypeDRILLED
Hole Quantity6
Nominal Thread Diameter0.750 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
6135-00-100-0453 INTERCHANGEABLE
Battery,nonrechargeable
4310-00-824-5743661B INTERCHANGEABLE
Coil,cooler
Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
Cross-Reference Index
Part NumberManufacturer
661B PRIMARY Textron Lycoming Inc Williamsport Plant (USA)
Related Parts
6135-00-100-0453INTERCHANGEABLE
BATTERY,NONRECHARGEABLE
4310-00-824-5743INTERCHANGEABLE
COIL,COOLER
661B

Frequently Asked Questions

What is NSN 5306-00-550-0702?

NSN 5306-00-550-0702 is a Bolt,machine, manufactured by Textron Lycoming Inc Williamsport Plant, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-550-0702?

NSN 5306-00-550-0702 has 1 cross-referenced part number: 661B (Textron Lycoming Inc Williamsport Plant).

What NSN replaces 5306-00-550-0702?

There are 2 known substitutes for 5306-00-550-0702: 6135-00-100-0453, 4310-00-824-5743. Verify interchangeability with system specifications before substitution.

What are the specifications of 661B?

Key specifications for 661B: Surface Treatment: CADMIUM OVERALL; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Fastener Length: 1.030 INCHES NOMINAL IN; Head Height: 0.190 INCHES NOMINAL IN. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-550-0702 still in active supply?

NSN 5306-00-550-0702 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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