PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

23MS35337-44Washer,lock

L3harris Cincinnati Electronics Corporation · NSN 5310-00-820-6655 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-820-6655 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-820-6655. Primary manufacturer part number: 23MS35337-44.
Features
  • Washer,lock — FSC 5310
  • Hole Diameter: 0.255 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Departure From Cited Designator: AS MODIFIED BY MATERIAL
  • Material Document and Classification: -FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
  • Surface Treatment: CADMIUM AND CHROMATE OVERALL
  • Material Thickness: 0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-820-6655, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is L3harris Cincinnati Electronics Corporation. 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: Active.

Technical Specifications
ParameterValue
NSN5310-00-820-6655
Primary Part Number23MS35337-44
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerL3harris Cincinnati Electronics Corporation
StatusACTIVE
Hole Diameter0.255 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
Style DesignatorSPLIT HELICAL-RIGHT HAND
Departure From Cited DesignatorAS MODIFIED BY MATERIAL
Material Document and Classification-FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Material Thickness0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
Outside Diameter0.489 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-00-167-0667 INTERCHANGEABLE
Washer,lock
5310-00-582-5965196 INTERCHANGEABLE
Washer,lock
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
Cross-Reference Index
Part NumberManufacturer
23MS35337-44 PRIMARY L3harris Cincinnati Electronics Corporation (USA)
MS35337-44 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-167-0667INTERCHANGEABLE
WASHER,LOCK
5310-00-582-5965INTERCHANGEABLE
WASHER,LOCK
196

Frequently Asked Questions

What is NSN 5310-00-820-6655?

NSN 5310-00-820-6655 is a Washer,lock, manufactured by L3harris Cincinnati Electronics Corporation, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-820-6655?

NSN 5310-00-820-6655 has 2 cross-referenced part numbers: 23MS35337-44 (L3harris Cincinnati Electronics Corporation), MS35337-44 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-820-6655?

There are 2 known substitutes for 5310-00-820-6655: 5310-00-167-0667, 5310-00-582-5965. Verify interchangeability with system specifications before substitution.

What are the specifications of 23MS35337-44?

Key specifications for 23MS35337-44: Hole Diameter: 0.255 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN; Style Designator: SPLIT HELICAL-RIGHT HAND; Departure From Cited Designator: AS MODIFIED BY MATERIAL; Material Document and Classification: -FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL. 9 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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