PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

43-770Washer,flat

Amphenol Corp Div Amphenol Aerospace Operations · NSN 5310-00-612-6063 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-612-6063 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-612-6063. Primary manufacturer part number: 43-770.
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
  • Material Document and Classification: QQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
  • Material: STEEL COMP 304 OR STEEL COMP 347 OVERALL
  • Surface Treatment Document and Classification: 660,FSCM 29587 MFR REF SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 304 or Steel Comp 347 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-612-6063, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Amphenol Corp Div Amphenol Aerospace Operations. 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-612-6063
Primary Part Number43-770
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerAmphenol Corp Div Amphenol Aerospace Operations
StatusACTIVE
Overall Diameter0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
Material Document and ClassificationQQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
MaterialSTEEL COMP 304 OR STEEL COMP 347 OVERALL
Surface Treatment Document and Classification660,FSCM 29587 MFR REF SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Center Hole Shape StyleROUND
Thickness0.029 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
Hole Diameter0.151 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5315-00-021-8217218217 INTERCHANGEABLE
Key,woodruff
General Motors Corp
2930-01-350-998743770 INTERCHANGEABLE
Impeller,fan,axial
Cummins Inc.
Cross-Reference Index
Part NumberManufacturer
43-770 PRIMARY Amphenol Corp Div Amphenol Aerospace Operations (USA)
43-770 Amphenol Corp Spectra-Strip/itd (USA)
Related Parts
5315-00-021-8217INTERCHANGEABLE
KEY,WOODRUFF
218217
2930-01-350-9987INTERCHANGEABLE
IMPELLER,FAN,AXIAL
43770

Frequently Asked Questions

What is NSN 5310-00-612-6063?

NSN 5310-00-612-6063 is a Washer,flat, manufactured by Amphenol Corp Div Amphenol Aerospace Operations, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-612-6063?

NSN 5310-00-612-6063 has 2 cross-referenced part numbers: 43-770 (Amphenol Corp Div Amphenol Aerospace Operations), 43-770 (Amphenol Corp Spectra-Strip/itd).

What NSN replaces 5310-00-612-6063?

There are 2 known substitutes for 5310-00-612-6063: 5315-00-021-8217, 2930-01-350-9987. Verify interchangeability with system specifications before substitution.

What are the specifications of 43-770?

Key specifications for 43-770: Overall Diameter: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL; Material: STEEL COMP 304 OR STEEL COMP 347 OVERALL; Surface Treatment Document and Classification: 660,FSCM 29587 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 10 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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