PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFW84CLASSCSTYLE1Washer,lock

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-576-1027 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-576-1027 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-576-1027. Primary manufacturer part number: FFW84CLASSCSTYLE1.
Features
  • Washer,lock — FSC 5310
  • Outside Diameter: 0.361 INCHES MAXIMUM IN
  • Material: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 385 OR STEEL COMP 384 OVERALL
  • Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL
  • Nondefinitive Spec/std Data: C CLASS AND 1 STYLE
  • Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
  • Surface Treatment: PASSIVATE OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 or Steel Comp 302 or Steel Comp 303 or Steel Comp 303SE or Steel Comp 304 or Steel Comp 304l or Steel Comp 305 or Steel Comp 308 or Steel Comp 309 or Steel Comp 309s or Steel Comp 310 or Steel Comp 310s or Steel Comp 314 or Steel Comp 316 or Steel Comp 316l or Steel Comp 317 or Steel Comp 321 or Steel Comp 347 or Steel Comp 348 or Steel Comp 385 or Steel Comp 384 Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-576-1027, 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 11 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-576-1027
Primary Part NumberFFW84CLASSCSTYLE1
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Outside Diameter0.361 INCHES MAXIMUM IN
MaterialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 385 OR STEEL COMP 384 OVERALL
Material Document and Classification66 FED STD ALL MATERIAL RESPONSES OVERALL
Nondefinitive Spec/std DataC CLASS AND 1 STYLE
Hardness Rating35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
Surface TreatmentPASSIVATE OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Hole Diameter0.255 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
Material Thickness0.047 INCHES NOMINAL IN
Departure From Cited DesignatorAS MODIFIED BY OD AND MATERIAL THK
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5310-00-058-29489157798-54 INTERCHANGEABLE
Washer,lock
Us Army Aviation and Missile Command
5310-00-209-123512Z3018-25 INTERCHANGEABLE
Washer,lock
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-262-3576 INTERCHANGEABLE
Washer,lock
5310-00-576-1023 INTERCHANGEABLE
Washer,lock
5310-00-595-7159 INTERCHANGEABLE
Washer,lock
5310-00-596-8771 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
FFW84CLASSCSTYLE1 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-058-2948INTERCHANGEABLE
WASHER,LOCK
9157798-54
5310-00-209-1235INTERCHANGEABLE
WASHER,LOCK
12Z3018-25
5310-00-262-3576INTERCHANGEABLE
WASHER,LOCK
5310-00-576-1023INTERCHANGEABLE
WASHER,LOCK
5310-00-595-7159INTERCHANGEABLE
WASHER,LOCK
5310-00-596-8771INTERCHANGEABLE
WASHER,LOCK

Frequently Asked Questions

What is NSN 5310-00-576-1027?

NSN 5310-00-576-1027 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 5310-00-576-1027?

NSN 5310-00-576-1027 has 1 cross-referenced part number: FFW84CLASSCSTYLE1 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-576-1027?

There are 6 known substitutes for 5310-00-576-1027: 5310-00-058-2948, 5310-00-209-1235, 5310-00-262-3576 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFW84CLASSCSTYLE1?

Key specifications for FFW84CLASSCSTYLE1: Outside Diameter: 0.361 INCHES MAXIMUM IN; Material: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 385 OR STEEL COMP 384 OVERALL; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL; Nondefinitive Spec/std Data: C CLASS AND 1 STYLE. 11 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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