PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

843721Washer,flat

Honeywell International, Inc Div Aerospace-Tucson · NSN 5310-00-297-9361 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-297-9361 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-297-9361. Primary manufacturer part number: 843721.
Features
  • Washer,flat — FSC 5310
  • Peripheral Shape Style: ROUND
  • Material Document and Classification: MIL-I-2706 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Environmental Attribute Code: ASBESTOS ALTERNATIVE PRODUCTS
  • Thickness: 0.031 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
  • Hole Diameter: 0.171 INCHES NOMINAL IN
  • Overall Diameter: 0.375 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Asbestos Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-297-9361, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Honeywell International, Inc Div Aerospace-Tucson. Government technical data includes 9 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: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-297-9361
Primary Part Number843721
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHoneywell International, Inc Div Aerospace-Tucson
StatusCANCELLED
Peripheral Shape StyleROUND
Material Document and ClassificationMIL-I-2706 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Environmental Attribute CodeASBESTOS ALTERNATIVE PRODUCTS
Thickness0.031 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Hole Diameter0.171 INCHES NOMINAL IN
Overall Diameter0.375 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
MaterialASBESTOS OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5935-00-588-08572876174 INTERCHANGEABLE
Connector,plug,electrical
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5998-01-259-1573843721 INTERCHANGEABLE
Circuit Card Assembly
Cae Usa Inc.
Cross-Reference Index
Part NumberManufacturer
843721 PRIMARY Honeywell International, Inc Div Aerospace-Tucson (USA)
843721 Allied Signal Inc Aerospace Equipment Systems Eatontown Site (USA)
Related Parts
5935-00-588-0857INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2876174
5998-01-259-1573INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
843721

Frequently Asked Questions

What is NSN 5310-00-297-9361?

NSN 5310-00-297-9361 is a Washer,flat, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-297-9361?

NSN 5310-00-297-9361 has 2 cross-referenced part numbers: 843721 (Honeywell International, Inc Div Aerospace-Tucson), 843721 (Allied Signal Inc Aerospace Equipment Systems Eatontown Site).

What NSN replaces 5310-00-297-9361?

There are 2 known substitutes for 5310-00-297-9361: 5935-00-588-0857, 5998-01-259-1573. Verify interchangeability with system specifications before substitution.

What are the specifications of 843721?

Key specifications for 843721: Peripheral Shape Style: ROUND; Material Document and Classification: MIL-I-2706 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Environmental Attribute Code: ASBESTOS ALTERNATIVE PRODUCTS; Thickness: 0.031 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-297-9361 still in active supply?

NSN 5310-00-297-9361 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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