PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K91508Washer,key

The Timken Corporation · NSN 5310-00-882-8320 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-882-8320 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-882-8320. Primary manufacturer part number: K91508.
Features
  • Washer,key — FSC 5310
  • Internal Straight Key Width: 0.290 INCHES NOMINAL IN
  • Style Designator: KEY
  • Material: STEEL OVERALL
  • Outside Diameter: 2.750 INCHES NOMINAL IN
  • Internal Key Quantity: 1
  • Material Thickness: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
  • Hole Diameter: 1.583 INCHES MINIMUM AND 1.603 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 5310-00-882-8320, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is The Timken Corporation. Government technical data includes 8 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-882-8320
Primary Part NumberK91508
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerThe Timken Corporation
StatusCANCELLED
Internal Straight Key Width0.290 INCHES NOMINAL IN
Style DesignatorKEY
MaterialSTEEL OVERALL
Outside Diameter2.750 INCHES NOMINAL IN
Internal Key Quantity1
Material Thickness0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
Hole Diameter1.583 INCHES MINIMUM AND 1.603 INCHES MAXIMUM IN
Distance From Centerline to Top of Internal Key0.669 INCHES MINIMUM AND 0.684 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
5330-00-086-2206 INTERCHANGEABLE
Seal,plain Encased
5133-00-228-1334 INTERCHANGEABLE
Drill,twist
5905-00-264-7078 INTERCHANGEABLE
Resistor,fixed,wire Wound
4820-00-624-337320047 INTERCHANGEABLE
Valve,butterfly
Emerson Automation Solutions Final Control Us Lp
5950-00-815-7306 INTERCHANGEABLE
Coil,radio Frequency
5305-00-853-384920047 INTERCHANGEABLE
Screw,machine
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
3040-01-096-11342004-7 INTERCHANGEABLE
Connecting Link,rigid
Tyee Aircraft Inc Div Tyee Aircraft
5975-01-099-10360020040730 INTERCHANGEABLE
Rack,cable,interior
Newton Instrument Company Dba Newton Instrument Co
4820-01-112-364920047 INTERCHANGEABLE
Valve,safety Relief
Electro Impulse Laboratory Inc Dba Electro Impulse Inc
4920-01-297-970920047 INTERCHANGEABLE
Test Program Set
Textron Systems Corporation Dba Textron Systems Corp
Cross-Reference Index
Part NumberManufacturer
00901-0559 Harsco Corp Bmy-Combat Systems Div (USA)
901-0559 Harsco Corp Bmy-Combat Systems Div (USA)
K91508 PRIMARY The Timken Corporation (USA)
20047 Western Mfg Co (USA)
00901-0559 Asrc Federal Facilities Logistics, Llc (USA)
Related Parts
5330-00-086-2206INTERCHANGEABLE
SEAL,PLAIN ENCASED
5133-00-228-1334INTERCHANGEABLE
DRILL,TWIST
5905-00-264-7078INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
4820-00-624-3373INTERCHANGEABLE
VALVE,BUTTERFLY
20047
5950-00-815-7306INTERCHANGEABLE
COIL,RADIO FREQUENCY
5305-00-853-3849INTERCHANGEABLE
SCREW,MACHINE
20047
3040-01-096-1134INTERCHANGEABLE
CONNECTING LINK,RIGID
2004-7
5975-01-099-1036INTERCHANGEABLE
RACK,CABLE,INTERIOR
0020040730
4820-01-112-3649INTERCHANGEABLE
VALVE,SAFETY RELIEF
20047
4920-01-297-9709INTERCHANGEABLE
TEST PROGRAM SET
20047
5950-01-303-7508INTERCHANGEABLE
TRANSFORMER,POWER
20047

Frequently Asked Questions

What is NSN 5310-00-882-8320?

NSN 5310-00-882-8320 is a Washer,key, manufactured by The Timken Corporation, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-882-8320?

NSN 5310-00-882-8320 has 5 cross-referenced part numbers: 00901-0559 (Harsco Corp Bmy-Combat Systems Div), 901-0559 (Harsco Corp Bmy-Combat Systems Div), K91508 (The Timken Corporation), 20047 (Western Mfg Co), 00901-0559 (Asrc Federal Facilities Logistics, Llc).

What NSN replaces 5310-00-882-8320?

There are 11 known substitutes for 5310-00-882-8320: 5330-00-086-2206, 5133-00-228-1334, 5905-00-264-7078 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of K91508?

Key specifications for K91508: Internal Straight Key Width: 0.290 INCHES NOMINAL IN; Style Designator: KEY; Material: STEEL OVERALL; Outside Diameter: 2.750 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-882-8320 still in active supply?

NSN 5310-00-882-8320 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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