PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

911289Washer,flat

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5310-00-236-6561 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-236-6561 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-236-6561. Primary manufacturer part number: 911289.
Features
  • Washer,flat — FSC 5310
  • Peripheral Shape Style: ROUND
  • Center Hole Shape Style: ROUND
  • Overall Diameter: 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
  • Hole Diameter: 0.164 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL
  • Material: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 or Steel Comp 302 or Steel Comp 316 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-236-6561, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 10 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-236-6561
Primary Part Number911289
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Peripheral Shape StyleROUND
Center Hole Shape StyleROUND
Overall Diameter0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
Hole Diameter0.164 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Material Document and Classification66 FED STD ALL MATERIAL RESPONSES OVERALL
MaterialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
Surface TreatmentPASSIVATE OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Thickness0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5961-00-272-8293 INTERCHANGEABLE
Transistor
5310-00-685-3744 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
911289 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5961-00-272-8293INTERCHANGEABLE
TRANSISTOR
5310-00-685-3744INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 5310-00-236-6561?

NSN 5310-00-236-6561 is a Washer,flat, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-236-6561?

NSN 5310-00-236-6561 has 1 cross-referenced part number: 911289 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 5310-00-236-6561?

There are 2 known substitutes for 5310-00-236-6561: 5961-00-272-8293, 5310-00-685-3744. Verify interchangeability with system specifications before substitution.

What are the specifications of 911289?

Key specifications for 911289: Peripheral Shape Style: ROUND; Center Hole Shape Style: ROUND; Overall Diameter: 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN; Hole Diameter: 0.164 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN. 10 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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