PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25643Washer,flat

Triumph Engine Control Systems Llc · NSN 5310-01-033-2688 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-033-2688 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-033-2688. Primary manufacturer part number: 25643.
Features
  • Washer,flat — FSC 5310
  • Hole Diameter: 0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
  • Material Document and Classification: MIL-S-5059 COND HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL COMP 301 OVERALL
  • Cross-Sectional Shape Style: RECTANGULAR
  • Overall Diameter: 0.240 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
  • Peripheral Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-033-2688, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-01-033-2688
Primary Part Number25643
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTriumph Engine Control Systems Llc
StatusCANCELLED
Hole Diameter0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
Material Document and ClassificationMIL-S-5059 COND HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL COMP 301 OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Overall Diameter0.240 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Peripheral Shape StyleROUND
Thickness0.014 INCHES MINIMUM AND 0.016 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
5360-00-200-698125643 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace, Llc Dba Jackson South
5133-00-236-3404 INTERCHANGEABLE
Drill,twist
5935-00-624-7309KPSE65041-263 INTERCHANGEABLE
Connector,receptacle,electrical
Itt Cannon Llc
5950-00-645-39132564-3 INTERCHANGEABLE
Coil,radio Frequency
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5331-01-267-2936 INTERCHANGEABLE
O-Ring
5820-01-556-099125643 INTERCHANGEABLE
Camera,flexible,inspection
Ridge Tool Company
Cross-Reference Index
Part NumberManufacturer
25643 Systemes De Controles Goodrich Ltee (CAN)
25643 PRIMARY Triumph Engine Control Systems Llc (USA)
Related Parts
5360-00-200-6981INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
25643
5133-00-236-3404INTERCHANGEABLE
DRILL,TWIST
5935-00-624-7309INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
KPSE65041-263
5950-00-645-3913INTERCHANGEABLE
COIL,RADIO FREQUENCY
2564-3
5331-01-267-2936INTERCHANGEABLE
O-RING
5820-01-556-0991INTERCHANGEABLE
CAMERA,FLEXIBLE,INSPECTION
25643

Frequently Asked Questions

What is NSN 5310-01-033-2688?

NSN 5310-01-033-2688 is a Washer,flat, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-01-033-2688?

NSN 5310-01-033-2688 has 2 cross-referenced part numbers: 25643 (Systemes De Controles Goodrich Ltee), 25643 (Triumph Engine Control Systems Llc).

What NSN replaces 5310-01-033-2688?

There are 6 known substitutes for 5310-01-033-2688: 5360-00-200-6981, 5133-00-236-3404, 5935-00-624-7309 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25643?

Key specifications for 25643: Hole Diameter: 0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059 COND HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL COMP 301 OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-01-033-2688 still in active supply?

NSN 5310-01-033-2688 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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