PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51104Washer,key

Meritor Heavy Vehicle Systems, Llc · NSN 5310-00-350-0139 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-350-0139 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-350-0139. Primary manufacturer part number: 51104.
Features
  • Washer,key — FSC 5310
  • Style Designator: KEY
  • Material: STEEL OVERALL
  • Internal Key Quantity: 16
  • Hole Diameter: 2.499 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN
  • Outside Diameter: 2.938 INCHES NOMINAL IN
  • Distance From Centerline to Top of Internal Key: 1.075 INCHES NOMINAL IN
  • Material Thickness: 0.048 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-350-0139, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Meritor Heavy Vehicle 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-350-0139
Primary Part Number51104
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMeritor Heavy Vehicle Systems, Llc
StatusACTIVE
Style DesignatorKEY
MaterialSTEEL OVERALL
Internal Key Quantity16
Hole Diameter2.499 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN
Outside Diameter2.938 INCHES NOMINAL IN
Distance From Centerline to Top of Internal Key1.075 INCHES NOMINAL IN
Material Thickness0.048 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
Internal Straight Key Width0.156 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5950-00-147-4303123-309 INTERCHANGEABLE
Coil,radio Frequency
Avionics Specialties, Inc.
2940-00-203-310251104 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
5133-00-236-3414 INTERCHANGEABLE
Drill,twist
1680-00-408-907251104 INTERCHANGEABLE
Universal Joint,aircraft
Dressta North America Ltd
5999-00-502-9425 INTERCHANGEABLE
Contact,electrical
3110-00-761-657719280 INTERCHANGEABLE
Bearing,ball,thrust
Skf Usa Inc.
4320-01-149-48751159SCH202-1 INTERCHANGEABLE
Pump,rotary
Northrop Grumman Systems Corporation
5120-01-518-2100RM16 INTERCHANGEABLE
Mallet,rubber
Westward Corp
Cross-Reference Index
Part NumberManufacturer
51104 Kaitlin Corp (USA)
51104 PRIMARY Meritor Heavy Vehicle Systems, Llc (USA)
Related Parts
5950-00-147-4303INTERCHANGEABLE
COIL,RADIO FREQUENCY
123-309
2940-00-203-3102INTERCHANGEABLE
FILTER ELEMENT,FLUID
51104
5133-00-236-3414INTERCHANGEABLE
DRILL,TWIST
1680-00-408-9072INTERCHANGEABLE
UNIVERSAL JOINT,AIRCRAFT
51104
5999-00-502-9425INTERCHANGEABLE
CONTACT,ELECTRICAL
3110-00-761-6577INTERCHANGEABLE
BEARING,BALL,THRUST
19280
4320-01-149-4875INTERCHANGEABLE
PUMP,ROTARY
1159SCH202-1
5120-01-518-2100INTERCHANGEABLE
MALLET,RUBBER
RM16

Frequently Asked Questions

What is NSN 5310-00-350-0139?

NSN 5310-00-350-0139 is a Washer,key, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-350-0139?

NSN 5310-00-350-0139 has 2 cross-referenced part numbers: 51104 (Kaitlin Corp), 51104 (Meritor Heavy Vehicle Systems, Llc).

What NSN replaces 5310-00-350-0139?

There are 8 known substitutes for 5310-00-350-0139: 5950-00-147-4303, 2940-00-203-3102, 5133-00-236-3414 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51104?

Key specifications for 51104: Style Designator: KEY; Material: STEEL OVERALL; Internal Key Quantity: 16; Hole Diameter: 2.499 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN. 8 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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