PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-3908-8Spar,aircraft

The Boeing Company Div Defense · NSN 1560-01-605-7129 · FSC 1560 · No Item Name Available
Verified by PartsTable
NSN 1560-01-605-7129 — this item is cataloged by the U.S. Government under National Stock Number 1560-01-605-7129. Primary manufacturer part number: 4-3908-8.
Features
  • Spar,aircraft — FSC 1560
  • Material: ALUMINUM ALLOY 7075
  • Aircraft Mission Design Series: B52
  • Material Thickness: 0.040 INCHES NOMINAL IN
  • Side for Which Designed: BOTH SIDES
  • Material Document and Classification: AMS-QQ-A-250/13 ASSN STD SINGLE MATERIAL RESPONSE
  • 1 verified cross-reference
  • Primary manufacturer: The Boeing Company Div Defense
Applications
  • Applications requiring Aluminum Alloy 7075 construction
General Description

The Spar,aircraft, cataloged under National Stock Number 1560-01-605-7129, is classified within Federal Supply Class 1560 (No Item Name Available) of the Aircraft and Airframe Components group. The primary manufacturer of record is The Boeing Company Div Defense. Government technical data includes 5 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1560-01-605-7129
Primary Part Number4-3908-8
Item NameSpar,aircraft
FSC / FSG1560 / 15 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusACTIVE
MaterialALUMINUM ALLOY 7075
Aircraft Mission Design SeriesB52
Material Thickness0.040 INCHES NOMINAL IN
Side for Which DesignedBOTH SIDES
Material Document and ClassificationAMS-QQ-A-250/13 ASSN STD SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4210-01-448-3418439088 INTERCHANGEABLE
Link,fusible,fire
Tyco Fire Products Lp
Cross-Reference Index
Part NumberManufacturer
4-3908-8 PRIMARY The Boeing Company Div Defense (USA)
Related Parts
4210-01-448-3418INTERCHANGEABLE
LINK,FUSIBLE,FIRE
439088

Frequently Asked Questions

What is NSN 1560-01-605-7129?

NSN 1560-01-605-7129 is a Spar,aircraft, manufactured by The Boeing Company Div Defense, classified under FSC 1560 (No Item Name Available). Status: active.

What are the part numbers for NSN 1560-01-605-7129?

NSN 1560-01-605-7129 has 1 cross-referenced part number: 4-3908-8 (The Boeing Company Div Defense).

What NSN replaces 1560-01-605-7129?

There is 1 known substitute for 1560-01-605-7129: 4210-01-448-3418. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-3908-8?

Key specifications for 4-3908-8: Material: ALUMINUM ALLOY 7075; End Item Identification: B-52 AIRCRAFT; Aircraft Mission Design Series: B52; Part Name Assigned by Controlling Agency: SPAR INSTALLATION AFT BOMB DOOR UPPER. 8 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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