PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7491Washer,split

Lucas Aerospace Power Equipment Corporation · NSN 5310-00-596-8861 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-596-8861 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-596-8861. Primary manufacturer part number: 7491.
Features
  • Washer,split — FSC 5310
  • Surface Treatment: CADMIUM OVERALL
  • Style Designator: SPLIT
  • Outside Diameter: 0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
  • Hole Diameter: 0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
  • Distance Across Split Opening: 0.074 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
  • Material Thickness: 0.0253 INCHES NOMINAL IN
  • Material: COPPER ALLOY OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,split, cataloged under National Stock Number 5310-00-596-8861, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lucas Aerospace Power Equipment Corporation. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-596-8861
Primary Part Number7491
Item NameWasher,split
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLucas Aerospace Power Equipment Corporation
StatusACTIVE
Surface TreatmentCADMIUM OVERALL
Style DesignatorSPLIT
Outside Diameter0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
Hole Diameter0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
Distance Across Split Opening0.074 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
Material Thickness0.0253 INCHES NOMINAL IN
MaterialCOPPER ALLOY OVERALL
Material Document and ClassificationQQ-B-746 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4820-00-161-77296464 INTERCHANGEABLE
Seat,valve
Wallace-Murray Corp Eljer Plumbingware Div Vitreous China Plant
5330-00-202-32967491 INTERCHANGEABLE
Rubber Strip
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
5999-00-241-7739 INTERCHANGEABLE
Contact,electrical
4820-00-287-561112Z6044-4 INTERCHANGEABLE
Valve,pneumatic Tank
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5360-00-373-8759749-1 INTERCHANGEABLE
Spring,helical,compression
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
4440-01-044-0890 INTERCHANGEABLE
Disk Assembly,strainer
5310-01-240-54307491 INTERCHANGEABLE
Washer,safety
Essex Industries, Inc. Dba Essex Industries
5930-01-616-9228PP11-51-10.0A-XX-V INTERCHANGEABLE
Switch,push-Pull
Sensata Technologies Maryland, Inc
Cross-Reference Index
Part NumberManufacturer
7491 Lucas Aerospace Power Equipment Corporation (USA)
7491 Safran Power Usa Llc (USA)
Related Parts
4820-00-161-7729INTERCHANGEABLE
SEAT,VALVE
6464
5330-00-202-3296INTERCHANGEABLE
RUBBER STRIP
7491
5999-00-241-7739INTERCHANGEABLE
CONTACT,ELECTRICAL
4820-00-287-5611INTERCHANGEABLE
VALVE,PNEUMATIC TANK
12Z6044-4
5360-00-373-8759INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
749-1
4440-01-044-0890INTERCHANGEABLE
DISK ASSEMBLY,STRAINER
5310-01-240-5430INTERCHANGEABLE
WASHER,SAFETY
7491
5930-01-616-9228INTERCHANGEABLE
SWITCH,PUSH-PULL
PP11-51-10.0A-XX-V

Frequently Asked Questions

What is NSN 5310-00-596-8861?

NSN 5310-00-596-8861 is a Washer,split, manufactured by Lucas Aerospace Power Equipment Corporation, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-596-8861?

NSN 5310-00-596-8861 has 2 cross-referenced part numbers: 7491 (Lucas Aerospace Power Equipment Corporation), 7491 (Safran Power Usa Llc).

What NSN replaces 5310-00-596-8861?

There are 8 known substitutes for 5310-00-596-8861: 4820-00-161-7729, 5330-00-202-3296, 5999-00-241-7739 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7491?

Key specifications for 7491: Surface Treatment: CADMIUM OVERALL; Style Designator: SPLIT; Outside Diameter: 0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN; Hole Diameter: 0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN. 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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