PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASME B18.21.1-A2 SIZE 5/16INWasher,flat

American National Standards Institute Incorporated Dba American National Standards Institute · NSN 5310-01-714-3663 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-714-3663 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-714-3663. Primary manufacturer part number: ASME B18.21.1-A2 SIZE 5/16IN.
Features
  • Washer,flat — FSC 5310
  • Center Hole Shape Style: ROUND
  • Cross-Sectional Shape Style: BLANK RECTANGULAR
  • Overall Diameter: 0.750 INCHES NOMINAL IN
  • Peripheral Shape Style: RECTANGULAR
  • Hole Diameter: 0.343 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: American National Standards Institute Incorporated Dba American National Standards Institute
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-714-3663, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is American National Standards Institute Incorporated Dba American National Standards Institute. Government technical data includes 5 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-714-3663
Primary Part NumberASME B18.21.1-A2 SIZE 5/16IN
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerAmerican National Standards Institute Incorporated Dba American National Standards Institute
StatusACTIVE
Center Hole Shape StyleROUND
Cross-Sectional Shape StyleBLANK RECTANGULAR
Overall Diameter0.750 INCHES NOMINAL IN
Peripheral Shape StyleRECTANGULAR
Hole Diameter0.343 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5360-00-312-5138 INTERCHANGEABLE
Spring,helical,compression
3040-00-356-3327SC-C-69585 INTERCHANGEABLE
Extension Shaft
Defense Logistics Agency Dba Defense Supply Center Philadelphia
4820-01-163-7546N382830058 INTERCHANGEABLE
Retainer,seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4520-01-331-658350456 INTERCHANGEABLE
Heating Element,electrical,nonim
Indeeco Llc Dba Indeeco
5930-01-553-031250456 INTERCHANGEABLE
Switch,rotary
Conductix Inc Div Conductix Wampfler
5950-01-667-922150456 INTERCHANGEABLE
Coil Transformer
Power Paragon, Inc. Dba Power Magnetics Div Power Magnetics
Cross-Reference Index
Part NumberManufacturer
ASME B18.21.1-A2 SIZE 5/16IN PRIMARY American National Standards Institute Incorporated Dba American National Standards Institute (USA)
50456 Eka Limited (GBR)
Related Parts
5360-00-312-5138INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
3040-00-356-3327INTERCHANGEABLE
EXTENSION SHAFT
SC-C-69585
4820-01-163-7546INTERCHANGEABLE
RETAINER,SEAT,VALVE
N382830058
4520-01-331-6583INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
50456
5930-01-553-0312INTERCHANGEABLE
SWITCH,ROTARY
50456
5950-01-667-9221INTERCHANGEABLE
COIL TRANSFORMER
50456

Frequently Asked Questions

What is NSN 5310-01-714-3663?

NSN 5310-01-714-3663 is a Washer,flat, manufactured by American National Standards Institute Incorporated Dba American National Standards Institute, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-714-3663?

NSN 5310-01-714-3663 has 2 cross-referenced part numbers: ASME B18.21.1-A2 SIZE 5/16IN (American National Standards Institute Incorporated Dba American National Standards Institute), 50456 (Eka Limited).

What NSN replaces 5310-01-714-3663?

There are 6 known substitutes for 5310-01-714-3663: 5360-00-312-5138, 3040-00-356-3327, 4820-01-163-7546 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ASME B18.21.1-A2 SIZE 5/16IN?

Key specifications for ASME B18.21.1-A2 SIZE 5/16IN: Center Hole Shape Style: ROUND; Cross-Sectional Shape Style: BLANK RECTANGULAR; Part Name Assigned by Controlling Agency: FLAT WASHER; Overall Diameter: 0.750 INCHES NOMINAL IN. 7 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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