PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFW84CLASSASTYLE4Washer,lock

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-209-5122 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-5122 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-5122. Primary manufacturer part number: FFW84CLASSASTYLE4.
Features
  • Washer,lock — FSC 5310
  • Material: STEEL OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
  • Hole Diameter: 0.088 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
  • Material Thickness: 0.027 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: A CLASS AND 4 STYLE
  • Material Document and Classification: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD SINGLE MATERIAL RESPONSE OVERALL
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 5310-00-209-5122, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 8 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-209-5122
Primary Part NumberFFW84CLASSASTYLE4
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
MaterialSTEEL OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
Hole Diameter0.088 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
Material Thickness0.027 INCHES NOMINAL IN
Nondefinitive Spec/std DataA CLASS AND 4 STYLE
Material Document and ClassificationFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter0.211 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-050-2331 INTERCHANGEABLE
Washer,lock
5310-00-050-2342 INTERCHANGEABLE
Washer,lock
5310-00-262-3522 INTERCHANGEABLE
Washer,lock
5310-00-262-3531 INTERCHANGEABLE
Washer,lock
5310-00-721-7809 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
FFW84CLASSASTYLE4 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-050-2331INTERCHANGEABLE
WASHER,LOCK
5310-00-050-2342INTERCHANGEABLE
WASHER,LOCK
5310-00-262-3522INTERCHANGEABLE
WASHER,LOCK
5310-00-262-3531INTERCHANGEABLE
WASHER,LOCK
5310-00-721-7809INTERCHANGEABLE
WASHER,LOCK

Frequently Asked Questions

What is NSN 5310-00-209-5122?

NSN 5310-00-209-5122 is a Washer,lock, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-209-5122?

NSN 5310-00-209-5122 has 1 cross-referenced part number: FFW84CLASSASTYLE4 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-209-5122?

There are 5 known substitutes for 5310-00-209-5122: 5310-00-050-2331, 5310-00-050-2342, 5310-00-262-3522 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFW84CLASSASTYLE4?

Key specifications for FFW84CLASSASTYLE4: Material: STEEL OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Hole Diameter: 0.088 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN. 8 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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