PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66781Washer,shouldered

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 5310-00-915-2727 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-915-2727 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-915-2727. Primary manufacturer part number: 66781.
Features
  • Washer,shouldered — FSC 5310
  • Style Designator: SHOULDERED
  • Material: STEEL COMP 303 OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Shoulder Diameter: 1.320 INCHES NOMINAL IN
  • Heat Treatment: ANNEALED
  • Outside Diameter: 1.475 INCHES NOMINAL IN
  • Hole Diameter: 1.175 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 303 Overall construction
General Description

The Washer,shouldered, cataloged under National Stock Number 5310-00-915-2727, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Parker Hannifin Corporation Div Hydraulic Systems Division. Government technical data includes 9 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-915-2727
Primary Part Number66781
Item NameWasher,shouldered
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
Style DesignatorSHOULDERED
MaterialSTEEL COMP 303 OVERALL
Surface TreatmentPASSIVATE OVERALL
Shoulder Diameter1.320 INCHES NOMINAL IN
Heat TreatmentANNEALED
Outside Diameter1.475 INCHES NOMINAL IN
Hole Diameter1.175 INCHES NOMINAL IN
Material Thickness0.025 INCHES NOMINAL IN
Shoulder Height0.040 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2510-00-040-20187368473 INTERCHANGEABLE
Shield
U S Army Tank Automotive Command Amsta-Im-Mm
6130-01-579-366166 781 INTERCHANGEABLE
Power Supply,uninterruptible
Mge UPS Systems, Inc.
5305-01-590-980540875 INTERCHANGEABLE
Screw,cap,socket Head
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
66781 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
30-1175-1 Rexnord Industries, Llc Div Aerospace Solutions Downers Grove (USA)
Related Parts
2510-00-040-2018INTERCHANGEABLE
SHIELD
7368473
6130-01-579-3661INTERCHANGEABLE
POWER SUPPLY,UNINTERRUPTIBLE
66 781
5305-01-590-9805INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
40875

Frequently Asked Questions

What is NSN 5310-00-915-2727?

NSN 5310-00-915-2727 is a Washer,shouldered, manufactured by Parker Hannifin Corporation Div Hydraulic Systems Division, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-915-2727?

NSN 5310-00-915-2727 has 2 cross-referenced part numbers: 66781 (Parker Hannifin Corporation Div Hydraulic Systems Division), 30-1175-1 (Rexnord Industries, Llc Div Aerospace Solutions Downers Grove).

What NSN replaces 5310-00-915-2727?

There are 3 known substitutes for 5310-00-915-2727: 2510-00-040-2018, 6130-01-579-3661, 5305-01-590-9805. Verify interchangeability with system specifications before substitution.

What are the specifications of 66781?

Key specifications for 66781: Style Designator: SHOULDERED; Material: STEEL COMP 303 OVERALL; Surface Treatment: PASSIVATE OVERALL; Shoulder Diameter: 1.320 INCHES NOMINAL IN. 9 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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