PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9A7009Washer,split

Napco International Llc Dba Napco International Inc · NSN 5310-00-521-4481 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-521-4481 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-521-4481. Primary manufacturer part number: 9A7009.
Features
  • Washer,split — FSC 5310
  • Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Style Designator: SPLIT
  • Material: STEEL COMP 1010 OVERALL
  • Material Thickness: 0.034 INCHES NOMINAL IN
  • Hardness Rating: 70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
  • Outside Diameter: 2.906 INCHES NOMINAL IN
  • Hole Diameter: 2.281 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1010 Overall construction
General Description

The Washer,split, cataloged under National Stock Number 5310-00-521-4481, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Napco International Llc Dba Napco International Inc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-521-4481
Primary Part Number9A7009
Item NameWasher,split
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNapco International Llc Dba Napco International Inc
StatusCANCELLED
Material Document and ClassificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Style DesignatorSPLIT
MaterialSTEEL COMP 1010 OVERALL
Material Thickness0.034 INCHES NOMINAL IN
Hardness Rating70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM
Outside Diameter2.906 INCHES NOMINAL IN
Hole Diameter2.281 INCHES NOMINAL IN
Distance Across Split Opening0.062 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5325-00-285-7132T8-6-5 INTERCHANGEABLE
Ring,retaining
Borg-Warner Corp
Cross-Reference Index
Part NumberManufacturer
9A7009 PRIMARY Napco International Llc Dba Napco International Inc (USA)
K5-15-33 PRIMARY Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products (USA)
2105125 General Motors Llc Dba General Motors Llc (USA)
3LE0219 PRIMARY Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.) (USA)
BB7030 Diamond Reo Truck Co (USA)
365547 White Motor Corp (USA)
K5-15-33 PRIMARY Dana Corp Spicer Transmission Div (USA)
5159266 PRIMARY Dana Corp Spicer Transmission Div (USA)
2105125 General Motors Corp (USA)
Related Parts
5325-00-285-7132INTERCHANGEABLE
RING,RETAINING
T8-6-5

Frequently Asked Questions

What is NSN 5310-00-521-4481?

NSN 5310-00-521-4481 is a Washer,split, manufactured by Napco International Llc Dba Napco International Inc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-521-4481?

NSN 5310-00-521-4481 has 9 cross-referenced part numbers: 9A7009 (Napco International Llc Dba Napco International Inc), K5-15-33 (Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products), 2105125 (General Motors Llc Dba General Motors Llc), 3LE0219 (Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)), BB7030 (Diamond Reo Truck Co) and 4 more.

What NSN replaces 5310-00-521-4481?

There is 1 known substitute for 5310-00-521-4481: 5325-00-285-7132. Verify interchangeability with system specifications before substitution.

What are the specifications of 9A7009?

Key specifications for 9A7009: Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Style Designator: SPLIT; Material: STEEL COMP 1010 OVERALL; Material Thickness: 0.034 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-521-4481 still in active supply?

NSN 5310-00-521-4481 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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