PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K250865Washer,keyway

Hdt Expeditionary Systems Inc · NSN 5310-00-406-2594 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-406-2594 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-406-2594. Primary manufacturer part number: K250865.
Features
  • Washer,keyway — FSC 5310
  • Material Document and Classification: ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL COMP 4615 OVERALL
  • Distance From Centerline to Bottom of Internal Keyway: 0.215 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
  • Internal Keyway Width: 0.063 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
  • Material Thickness: 0.131 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
  • Hole Diameter: 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
  • Internal Keyway Quantity: 1
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4615 Overall construction
General Description

The Washer,keyway, cataloged under National Stock Number 5310-00-406-2594, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hdt Expeditionary Systems Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-406-2594
Primary Part NumberK250865
Item NameWasher,keyway
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
Material Document and ClassificationASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL COMP 4615 OVERALL
Distance From Centerline to Bottom of Internal Keyway0.215 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
Internal Keyway Width0.063 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
Material Thickness0.131 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
Hole Diameter0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Internal Keyway Quantity1
Outside Diameter0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
Heat TreatmentAS FABRICATED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
8105-00-191-3902 INTERCHANGEABLE
Bag,plastic
Cross-Reference Index
Part NumberManufacturer
K250865 Drs Environmental Systems Inc (USA)
K250865 Davey Compressor Co Div of Keco Industries Inc (USA)
K250865 PRIMARY Hdt Expeditionary Systems Inc (USA)
250865 Davey Compressor Co Div of Keco Industries Inc (USA)
250865 Kidde-Fenwal, Llc (USA)
Related Parts
8105-00-191-3902INTERCHANGEABLE
BAG,PLASTIC

Frequently Asked Questions

What is NSN 5310-00-406-2594?

NSN 5310-00-406-2594 is a Washer,keyway, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-406-2594?

NSN 5310-00-406-2594 has 5 cross-referenced part numbers: K250865 (Drs Environmental Systems Inc), K250865 (Davey Compressor Co Div of Keco Industries Inc), K250865 (Hdt Expeditionary Systems Inc), 250865 (Davey Compressor Co Div of Keco Industries Inc), 250865 (Kidde-Fenwal, Llc).

What NSN replaces 5310-00-406-2594?

There is 1 known substitute for 5310-00-406-2594: 8105-00-191-3902. Verify interchangeability with system specifications before substitution.

What are the specifications of K250865?

Key specifications for K250865: Material Document and Classification: ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL COMP 4615 OVERALL; Distance From Centerline to Bottom of Internal Keyway: 0.215 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN; Internal Keyway Width: 0.063 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN. 9 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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