PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50148Washer,flat

Kleinschmidt Inc · NSN 5310-00-523-2003 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-523-2003 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-523-2003. Primary manufacturer part number: 50148.
Features
  • Washer,flat — FSC 5310
  • Surface Treatment: PHOSPHATE OVERALL
  • Surface Treatment Document and Classification: MIL-F-14072 FINISH E211 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
  • Surface Finish: 32.0 MICROINCHES BOTTOM
  • Material: STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
  • Surface Finish: 32.0 MICROINCHES TOP
  • Hole Diameter: 0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1006 or Steel Comp 1008 or Steel Comp 1010 or Steel Comp 1011 or Steel Comp 1012 or Steel Comp 1013 or Steel Comp 1015 or Steel Comp 1016 or Steel Comp 1017 or Steel Comp 1018 or Steel Comp 1019 or Steel Comp 1020 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-523-2003, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Kleinschmidt Inc. Government technical data includes 12 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-523-2003
Primary Part Number50148
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerKleinschmidt Inc
StatusACTIVE
Surface TreatmentPHOSPHATE OVERALL
Surface Treatment Document and ClassificationMIL-F-14072 FINISH E211 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Surface Finish32.0 MICROINCHES BOTTOM
MaterialSTEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
Surface Finish32.0 MICROINCHES TOP
Hole Diameter0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
Center Hole Shape StyleROUND
Overall Diameter0.437 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
Thickness0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
Peripheral Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4320-00-006-614945M155A1C20 INTERCHANGEABLE
Motor,hydraulic
Eaton Aerospace, Llc Dba Jackson South
5331-00-594-551750148 INTERCHANGEABLE
O-Ring
Waterous Company
5330-00-641-2171 INTERCHANGEABLE
Seal,plain Encased
5930-00-945-0085269-2356-000 INTERCHANGEABLE
Switch Section,rotary
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
6920-01-045-0563PS201 INTERCHANGEABLE
Pressure Measuring System
Validyne Engineering Corp Dba Validyne Engineering Corp
4820-01-271-015550148-08 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
5930-01-339-8733 INTERCHANGEABLE
Switch,toggle
5340-01-708-122850148 INTERCHANGEABLE
Plunger,detent
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
Cross-Reference Index
Part NumberManufacturer
50148 Kleinschmidt Inc (USA)
SCB69389-3 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
Related Parts
4320-00-006-6149INTERCHANGEABLE
MOTOR,HYDRAULIC
45M155A1C20
5331-00-594-5517INTERCHANGEABLE
O-RING
50148
5330-00-641-2171INTERCHANGEABLE
SEAL,PLAIN ENCASED
5930-00-945-0085INTERCHANGEABLE
SWITCH SECTION,ROTARY
269-2356-000
6920-01-045-0563INTERCHANGEABLE
PRESSURE MEASURING SYSTEM
PS201
4820-01-271-0155INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
50148-08
5930-01-339-8733INTERCHANGEABLE
SWITCH,TOGGLE
5340-01-708-1228INTERCHANGEABLE
PLUNGER,DETENT
50148

Frequently Asked Questions

What is NSN 5310-00-523-2003?

NSN 5310-00-523-2003 is a Washer,flat, manufactured by Kleinschmidt Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-523-2003?

NSN 5310-00-523-2003 has 2 cross-referenced part numbers: 50148 (Kleinschmidt Inc), SCB69389-3 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir).

What NSN replaces 5310-00-523-2003?

There are 8 known substitutes for 5310-00-523-2003: 4320-00-006-6149, 5331-00-594-5517, 5330-00-641-2171 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50148?

Key specifications for 50148: Surface Treatment: PHOSPHATE OVERALL; Surface Treatment Document and Classification: MIL-F-14072 FINISH E211 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL; Surface Finish: 32.0 MICROINCHES BOTTOM. 12 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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