PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21258-23Washer,key

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5310-00-222-0715 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-222-0715 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-222-0715. Primary manufacturer part number: MS21258-23.
Features
  • Washer,key — FSC 5310
  • Internal Straight Key Width: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
  • Material Document and Classification: ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Material: STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL
  • Style Designator: KEY
  • Outside Diameter: 1.875 INCHES MINIMUM IN
  • Material Thickness: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
  • Distance From Centerline to Top of Internal Key: 0.630 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1018 or Steel Comp 1020 or Steel Comp 1025 Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-222-0715, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-222-0715
Primary Part NumberMS21258-23
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Internal Straight Key Width0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
Material Document and ClassificationASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
MaterialSTEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL
Style DesignatorKEY
Outside Diameter1.875 INCHES MINIMUM IN
Material Thickness0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
Distance From Centerline to Top of Internal Key0.630 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
Hole Diameter1.440 INCHES MINIMUM AND 1.450 INCHES MAXIMUM IN
Internal Key Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3110-00-156-4719 INTERCHANGEABLE
Bearing,ball,annular
3030-00-169-5692A35-4 INTERCHANGEABLE
Belts,v,matched Set
Contitech Usa, Inc Dba Veyance Technologies
3455-00-187-2570 INTERCHANGEABLE
File,rotary
5940-00-231-1603 INTERCHANGEABLE
Terminal,lug
5305-00-245-147733115 INTERCHANGEABLE
Thumbscrew
Kinedyne Llc
3120-00-830-02465196793 INTERCHANGEABLE
Bearing,sleeve
Rolls-Royce Solutions America Inc
4920-01-022-2842 INTERCHANGEABLE
Blanket,cover,heater
5310-01-065-259633115 INTERCHANGEABLE
Washer,flat
Fastenal Company Dba Fastenal Co
4330-01-226-388733115 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
5962-01-323-0595CMA82000-636 INTERCHANGEABLE
Microcircuit,digital
Data Device Corp Dba Beta Transformer Technology
Cross-Reference Index
Part NumberManufacturer
33115 General Motors Corp (USA)
A35-4 United Industrial Corp (USA)
AC3209-1 Safety for Visual Education (USA)
33115 General Motors Llc Dba General Motors Llc (USA)
MS21258-23 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS21258-23 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
AN7503-23 Aeronautical Standards Group Dept of Navy and Air Force (USA)
Related Parts
3110-00-156-4719INTERCHANGEABLE
BEARING,BALL,ANNULAR
3030-00-169-5692INTERCHANGEABLE
BELTS,V,MATCHED SET
A35-4
3455-00-187-2570INTERCHANGEABLE
FILE,ROTARY
5940-00-231-1603INTERCHANGEABLE
TERMINAL,LUG
5305-00-245-1477INTERCHANGEABLE
THUMBSCREW
33115
3120-00-830-0246INTERCHANGEABLE
BEARING,SLEEVE
5196793
4920-01-022-2842INTERCHANGEABLE
BLANKET,COVER,HEATER
5310-01-065-2596INTERCHANGEABLE
WASHER,FLAT
33115
4330-01-226-3887INTERCHANGEABLE
FILTER ELEMENT,FLUID
33115
5962-01-323-0595INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
CMA82000-636
2815-01-396-0616INTERCHANGEABLE
OIL PUMP ASSEMBLY,ENGINE
33115

Frequently Asked Questions

What is NSN 5310-00-222-0715?

NSN 5310-00-222-0715 is a Washer,key, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-222-0715?

NSN 5310-00-222-0715 has 7 cross-referenced part numbers: 33115 (General Motors Corp), A35-4 (United Industrial Corp), AC3209-1 (Safety for Visual Education), 33115 (General Motors Llc Dba General Motors Llc), MS21258-23 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 2 more.

What NSN replaces 5310-00-222-0715?

There are 11 known substitutes for 5310-00-222-0715: 3110-00-156-4719, 3030-00-169-5692, 3455-00-187-2570 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21258-23?

Key specifications for MS21258-23: Internal Straight Key Width: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Material Document and Classification: ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL; Material: STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL; Style Designator: KEY. 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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