PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS35337-77Washer,lock

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-734-5666 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-734-5666 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-734-5666. Primary manufacturer part number: MS35337-77.
Features
  • Washer,lock — FSC 5310
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Material Thickness: 0.015 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
  • Outside Diameter: 0.165 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Hole Diameter: 0.088 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
  • Surface Treatment: PASSIVATE OVERALL
  • 1 verified cross-reference
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 5310-00-734-5666, 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 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-734-5666
Primary Part NumberMS35337-77
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Style DesignatorSPLIT HELICAL-RIGHT HAND
Material Thickness0.015 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
Outside Diameter0.165 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Hole Diameter0.088 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
Surface TreatmentPASSIVATE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5310-00-058-2950 INTERCHANGEABLE
Washer,lock
5310-00-793-8751 INTERCHANGEABLE
Washer,lock
5310-00-965-1796 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
MS35337-77 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-058-2950INTERCHANGEABLE
WASHER,LOCK
5310-00-793-8751INTERCHANGEABLE
WASHER,LOCK
5310-00-965-1796INTERCHANGEABLE
WASHER,LOCK

Frequently Asked Questions

What is NSN 5310-00-734-5666?

NSN 5310-00-734-5666 is a Washer,lock, 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 5310-00-734-5666?

NSN 5310-00-734-5666 has 1 cross-referenced part number: MS35337-77 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-734-5666?

There are 3 known substitutes for 5310-00-734-5666: 5310-00-058-2950, 5310-00-793-8751, 5310-00-965-1796. Verify interchangeability with system specifications before substitution.

What are the specifications of MS35337-77?

Key specifications for MS35337-77: Style Designator: SPLIT HELICAL-RIGHT HAND; Material Thickness: 0.015 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN; Special Features: FLEET BALLISTIC MISSILE QUALITY AS IDENTIFIED BY QUALITY CONTROL NO. P050 913284; Outside Diameter: 0.165 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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