PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

26N753PC34Washer,key

Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco · NSN 5310-00-186-0975 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-186-0975 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-186-0975. Primary manufacturer part number: 26N753PC34.
Features
  • Washer,key — FSC 5310
  • Internal Prebent Key Width: 0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
  • External Key Quantity: 19
  • Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Overall Distance Including Keys: 4.375 INCHES MAXIMUM IN
  • Hole Diameter: 3.177 INCHES MINIMUM AND 3.207 INCHES MAXIMUM IN
  • Style Designator: KEY
  • External Prebent Key Width: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1010 or Steel Comp 1012 or Steel Comp 1015 or Steel Comp 1016 or Steel Comp 1017 or Steel Comp 1018 or Steel Comp 1019 Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-186-0975, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 28 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-186-0975
Primary Part Number26N753PC34
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerColtec Industries Inc Dba Fairbanks Morse Engine Fm/alco
StatusCANCELLED
Internal Prebent Key Width0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
External Key Quantity19
Material Document and ClassificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
Overall Distance Including Keys4.375 INCHES MAXIMUM IN
Hole Diameter3.177 INCHES MINIMUM AND 3.207 INCHES MAXIMUM IN
Style DesignatorKEY
External Prebent Key Width0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Internal Prebent Key Length0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Hardness Rating50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
MaterialSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
Material Thickness0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
Outside Diameter3.844 INCHES MINIMUM AND 3.874 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4730-00-166-4160 INTERCHANGEABLE
Tee,pipe
5310-00-186-1032 INTERCHANGEABLE
Washer,key
9150-00-211-6057W16 INTERCHANGEABLE
Hydraulic Fluid,petroleum Base
Martin-Decker Totco, Inc Dba M/d Totco
5950-00-226-3877M-434 INTERCHANGEABLE
Transformer,power
Magnespec Inc
6250-00-253-6074M-434 INTERCHANGEABLE
Lampholder
Cole Hersee Company
4730-00-278-3836127887 INTERCHANGEABLE
Elbow,pipe to Tube
Navistar Intl Corp Truck Br Ohio Plant
2010-00-362-6831 INTERCHANGEABLE
Camshaft
5950-00-459-4239 INTERCHANGEABLE
Transformer,radio Frequency
4820-00-496-5899 INTERCHANGEABLE
Valve,check
5330-00-498-751640955 INTERCHANGEABLE
Gasket
L3 Technologies, Inc. Div Communication Systems-East
Cross-Reference Index
Part NumberManufacturer
26N753PC34 Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco (USA)
MA4-803DISSUE2PC123 Jered Brown Bros Inc Liberty Works the (USA)
MB1105APC10 Mkt Geotechnical Systems (USA)
26N611PC34 Fairbanks Morse, Llc (USA)
Y330 Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
V304PC128 Besser Company Dba Besser (USA)
N19309PC5 Timken Gears & Services Inc. Dba Philadelphia Gear Div Western Regional Service Center (USA)
C91080ALPC577 New York Naval Shipyard Naval Base (USA)
322044PC13 Capitol Gears Inc
60884ALT1PC127 Patterson Pump Co Div Patterson Pump Company (USA)
W16 Westinghouse Electric Corp (USA)
15531 Bomag Usa Sub of United Dominion Industries Ltd (USA)
29112PC8 Louis Allis Co the This Company Has Gone Bankrupt and Has Been Purchased by 3 Companies (USA)
32640GPC25 Stone Safety Corp (USA)
40955 Hyster-Yale Group, Inc. (USA)
W16 Skf Usa Inc. (USA)
DC69147WXPC52 Patterson Pump Co Div Patterson Pump Company (USA)
800922PC34 Rexnord Industries Llc (USA)
DC66670TGPC31 Boston Naval Shipyard (USA)
331320SH1ITEM42 Hercules Engine Co Inc (USA)
Related Parts
4730-00-166-4160INTERCHANGEABLE
TEE,PIPE
5310-00-186-1032INTERCHANGEABLE
WASHER,KEY
9150-00-211-6057INTERCHANGEABLE
HYDRAULIC FLUID,PETROLEUM BASE
W16
5950-00-226-3877INTERCHANGEABLE
TRANSFORMER,POWER
M-434
6250-00-253-6074INTERCHANGEABLE
LAMPHOLDER
M-434
4730-00-278-3836INTERCHANGEABLE
ELBOW,PIPE TO TUBE
127887
2010-00-362-6831INTERCHANGEABLE
CAMSHAFT
5950-00-459-4239INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
4820-00-496-5899INTERCHANGEABLE
VALVE,CHECK
5330-00-498-7516INTERCHANGEABLE
GASKET
40955
5999-00-499-7440INTERCHANGEABLE
HEATER,THERMAL RELEASE
W16
3120-00-516-7157INTERCHANGEABLE
BEARING,WASHER,THRUST

Frequently Asked Questions

What is NSN 5310-00-186-0975?

NSN 5310-00-186-0975 is a Washer,key, manufactured by Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-186-0975?

NSN 5310-00-186-0975 has 50 cross-referenced part numbers: 26N753PC34 (Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco), MA4-803DISSUE2PC123 (Jered Brown Bros Inc Liberty Works the), MB1105APC10 (Mkt Geotechnical Systems), 26N611PC34 (Fairbanks Morse, Llc), Y330 (Brinkley Technology Group Llc Dba Hercules Manufacturing) and 45 more.

What NSN replaces 5310-00-186-0975?

There are 12 known substitutes for 5310-00-186-0975: 4730-00-166-4160, 5310-00-186-1032, 9150-00-211-6057 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 26N753PC34?

Key specifications for 26N753PC34: Internal Prebent Key Width: 0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN; External Key Quantity: 19; Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL; Overall Distance Including Keys: 4.375 INCHES MAXIMUM IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-186-0975 still in active supply?

NSN 5310-00-186-0975 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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