PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AP50C-4Washer,flat

Hydraulics International, Inc. Dba Hydraulics International Inc · NSN 5310-01-568-9028 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-568-9028 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-568-9028. Primary manufacturer part number: AP50C-4.
Features
  • Washer,flat — FSC 5310
  • Material: COPPER OVERALL
  • 1 verified cross-reference
  • Primary manufacturer: Hydraulics International, Inc. Dba Hydraulics International Inc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-568-9028, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hydraulics International, Inc. Dba Hydraulics International Inc. Government technical data includes 1 verified specification, 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
NSN5310-01-568-9028
Primary Part NumberAP50C-4
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHydraulics International, Inc. Dba Hydraulics International Inc
StatusACTIVE
MaterialCOPPER OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-998-737210231502 INTERCHANGEABLE
Seal,conical,flared Tube Fitting
Us Army Aviation and Missile Command
Cross-Reference Index
Part NumberManufacturer
AP50C-4 PRIMARY Hydraulics International, Inc. Dba Hydraulics International Inc (USA)
Related Parts
4730-00-998-7372INTERCHANGEABLE
SEAL,CONICAL,FLARED TUBE FITTING
10231502

Frequently Asked Questions

What is NSN 5310-01-568-9028?

NSN 5310-01-568-9028 is a Washer,flat, manufactured by Hydraulics International, Inc. Dba Hydraulics International Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-568-9028?

NSN 5310-01-568-9028 has 1 cross-referenced part number: AP50C-4 (Hydraulics International, Inc. Dba Hydraulics International Inc).

What NSN replaces 5310-01-568-9028?

There is 1 known substitute for 5310-01-568-9028: 4730-00-998-7372. Verify interchangeability with system specifications before substitution.

What are the specifications of AP50C-4?

Key specifications for AP50C-4: Material: COPPER OVERALL; End Item Identification: HYBRID OTPS NO.3; Part Name Assigned by Controlling Agency: COPPER WASHER. 3 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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