PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS620C6Washer,flat

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-01-300-6397 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-300-6397 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-300-6397. Primary manufacturer part number: NAS620C6.
Features
  • Washer,flat — FSC 5310
  • Hole Diameter: 0.143 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
  • Overall Diameter: 0.262 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN
  • Thickness: 0.063 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Center Hole Shape Style: ROUND
  • Surface Treatment: PASSIVATE OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 or Steel Comp 302 or Steel Comp 304 or Steel Comp 304l or Steel Comp 305 or Steel Comp 309 or Steel Comp 310 or Steel Comp 316 or Steel Comp 316l or Steel Comp 321 or Steel Comp 323 or Steel Comp 347 or Steel Comp 348 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-300-6397, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 11 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-300-6397
Primary Part NumberNAS620C6
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Hole Diameter0.143 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
Overall Diameter0.262 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN
Thickness0.063 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Center Hole Shape StyleROUND
Surface TreatmentPASSIVATE OVERALL
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Material Document and ClassificationQQ-S-766,CONDITION A FED SPEC ALL MATERIAL RESPONSES OVERALL
Specification/standard Data80205-NAS620 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 321 OR STEEL COMP 323 OR STEEL COMP 347 OR STEEL COMP 348 OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5305-00-054-6653 INTERCHANGEABLE
Screw,machine
5310-00-773-7624NAS620C6 INTERCHANGEABLE
Washer,flat
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-01-497-3997NAS620C6 INTERCHANGEABLE
Washer,flat
Rolls Royce Corp
5310-01-663-9024NAS620C6 INTERCHANGEABLE
Washer,flat
L3 Technologies, Inc. Dba Communication Systems-West Div Communication Systems-West
5310-01-720-0563 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
NAS620C6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
5310PL0848158 Jednolity Indeks Materialowy - Uniform Material Index (POL)
Related Parts
5305-00-054-6653INTERCHANGEABLE
SCREW,MACHINE
5310-00-773-7624INTERCHANGEABLE
WASHER,FLAT
NAS620C6
5310-01-497-3997INTERCHANGEABLE
WASHER,FLAT
NAS620C6
5310-01-663-9024INTERCHANGEABLE
WASHER,FLAT
NAS620C6
5310-01-720-0563INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 5310-01-300-6397?

NSN 5310-01-300-6397 is a Washer,flat, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-300-6397?

NSN 5310-01-300-6397 has 2 cross-referenced part numbers: NAS620C6 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 5310PL0848158 (Jednolity Indeks Materialowy - Uniform Material Index).

What NSN replaces 5310-01-300-6397?

There are 5 known substitutes for 5310-01-300-6397: 5305-00-054-6653, 5310-00-773-7624, 5310-01-497-3997 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS620C6?

Key specifications for NAS620C6: Hole Diameter: 0.143 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN; Overall Diameter: 0.262 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN; Thickness: 0.063 INCHES NOMINAL IN; Peripheral Shape Style: ROUND. 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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