PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30521Washer,concave

United Technologies Corp Hamilton Sundstrand Corp · NSN 5310-00-385-5463 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-385-5463 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-385-5463. Primary manufacturer part number: 30521.
Features
  • Washer,concave — FSC 5310
  • Material: STEEL COMP 302 OVERALL
  • Style Designator: CONCAVE
  • Surface Treatment: PASSIVATE OVERALL
  • Radius: 0.141 INCHES NOMINAL IN
  • Material Thickness: 0.054 INCHES NOMINAL IN
  • Hole Diameter: 0.109 INCHES NOMINAL IN
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Washer,concave, cataloged under National Stock Number 5310-00-385-5463, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is United Technologies Corp Hamilton Sundstrand Corp. Government technical data includes 10 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-385-5463
Primary Part Number30521
Item NameWasher,concave
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerUnited Technologies Corp Hamilton Sundstrand Corp
StatusACTIVE
MaterialSTEEL COMP 302 OVERALL
Style DesignatorCONCAVE
Surface TreatmentPASSIVATE OVERALL
Radius0.141 INCHES NOMINAL IN
Material Thickness0.054 INCHES NOMINAL IN
Hole Diameter0.109 INCHES NOMINAL IN
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Material Document and ClassificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter0.248 INCHES NOMINAL IN
Recess Diameter0.230 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5310-00-013-771800192481 INTERCHANGEABLE
Nut,self-Locking,hexagon
Rolls-Royce Solutions America Inc
5360-00-292-11293182991 PC 68 INTERCHANGEABLE
Spring,helical,compression
Naval Sea Systems Command
6150-00-426-1969 INTERCHANGEABLE
Lead,electrical
5998-01-118-3624 INTERCHANGEABLE
Circuit Card Assembly
5940-01-374-836312419928-003 INTERCHANGEABLE
Terminal,quick Disconnect
Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc
5331-01-412-973230521 INTERCHANGEABLE
O-Ring
Blissfield Manufacturing Company
5305-01-599-260630521 INTERCHANGEABLE
Screw,cap,hexagon Head
Eagle Components, Inc
Cross-Reference Index
Part NumberManufacturer
30521 Hamilton Sundstrand Corporation Dba Collins Aerospace (USA)
30521 PRIMARY United Technologies Corp Hamilton Sundstrand Corp (USA)
Related Parts
5310-00-013-7718INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
00192481
5360-00-292-1129INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
3182991 PC 68
6150-00-426-1969INTERCHANGEABLE
LEAD,ELECTRICAL
5998-01-118-3624INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5940-01-374-8363INTERCHANGEABLE
TERMINAL,QUICK DISCONNECT
12419928-003
5331-01-412-9732INTERCHANGEABLE
O-RING
30521
5305-01-599-2606INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
30521

Frequently Asked Questions

What is NSN 5310-00-385-5463?

NSN 5310-00-385-5463 is a Washer,concave, manufactured by United Technologies Corp Hamilton Sundstrand Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-385-5463?

NSN 5310-00-385-5463 has 2 cross-referenced part numbers: 30521 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 30521 (United Technologies Corp Hamilton Sundstrand Corp).

What NSN replaces 5310-00-385-5463?

There are 7 known substitutes for 5310-00-385-5463: 5310-00-013-7718, 5360-00-292-1129, 6150-00-426-1969 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30521?

Key specifications for 30521: Material: STEEL COMP 302 OVERALL; Style Designator: CONCAVE; Surface Treatment: PASSIVATE OVERALL; Radius: 0.141 INCHES NOMINAL IN. 11 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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