PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS35333-116Washer,lock

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-209-3987 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-3987 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-3987. Primary manufacturer part number: MS35333-116.
Features
  • Washer,lock — FSC 5310
  • Nondefinitive Spec/std Data: 3 COMPOSITION AND A GRADE AND 1 STYLE AND 1 TYPE
  • Material: COPPER ALLOY OVERALL
  • Style Designator: FLAT INTERNAL TEETH
  • Outside Diameter: 1.220 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN
  • Hole Diameter: 0.768 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN
  • Material Thickness: 0.047 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
  • Hardness Rating: 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-209-3987, 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 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN5310-00-209-3987
Primary Part NumberMS35333-116
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
StatusCANCELLED
Nondefinitive Spec/std Data3 COMPOSITION AND A GRADE AND 1 STYLE AND 1 TYPE
MaterialCOPPER ALLOY OVERALL
Style DesignatorFLAT INTERNAL TEETH
Outside Diameter1.220 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN
Hole Diameter0.768 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN
Material Thickness0.047 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
Hardness Rating85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5310-00-022-8847MS35333-110 INTERCHANGEABLE
Washer,lock
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-00-042-4229MS35333-113 INTERCHANGEABLE
Washer,lock
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
MS35333-116 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
FFW100 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
13230E6743-116 Cecom Lr Center (USA)
13230E6743 Cecom Lr Center (USA)
Related Parts
5310-00-022-8847INTERCHANGEABLE
WASHER,LOCK
MS35333-110
5310-00-042-4229INTERCHANGEABLE
WASHER,LOCK
MS35333-113

Frequently Asked Questions

What is NSN 5310-00-209-3987?

NSN 5310-00-209-3987 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: cancelled.

What are the part numbers for NSN 5310-00-209-3987?

NSN 5310-00-209-3987 has 4 cross-referenced part numbers: MS35333-116 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), FFW100 (Federal Specifications Promulgated by General Services Administration Washington DC), 13230E6743-116 (Cecom Lr Center), 13230E6743 (Cecom Lr Center).

What NSN replaces 5310-00-209-3987?

There are 2 known substitutes for 5310-00-209-3987: 5310-00-022-8847, 5310-00-042-4229. Verify interchangeability with system specifications before substitution.

What are the specifications of MS35333-116?

Key specifications for MS35333-116: Nondefinitive Spec/std Data: 3 COMPOSITION AND A GRADE AND 1 STYLE AND 1 TYPE; Material: COPPER ALLOY OVERALL; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 1.220 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-209-3987 still in active supply?

NSN 5310-00-209-3987 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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