PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A997CPC30AWasher,key

Waterous Company · NSN 5310-00-186-0971 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-186-0971 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-186-0971. Primary manufacturer part number: A997CPC30A.
Features
  • Washer,key — FSC 5310
  • Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
  • External Prebent Key Width: 0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
  • Material: 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
  • Outside Diameter: 2.844 INCHES MINIMUM AND 2.874 INCHES MAXIMUM IN
  • Internal Prebent Key Length: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
  • Hardness Rating: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
  • Internal Prebent Key Width: 0.250 INCHES MINIMUM AND 0.290 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 5310-00-186-0971, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Waterous Company. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 22 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
NSN5310-00-186-0971
Primary Part NumberA997CPC30A
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerWaterous Company
StatusCANCELLED
Material Document and ClassificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
External Prebent Key Width0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
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
Outside Diameter2.844 INCHES MINIMUM AND 2.874 INCHES MAXIMUM IN
Internal Prebent Key Length0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
Hardness Rating50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
Internal Prebent Key Width0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
Style DesignatorKEY
External Key Quantity17
Hole Diameter2.400 INCHES MINIMUM AND 2.425 INCHES MAXIMUM IN
Material Thickness0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
Overall Distance Including Keys3.344 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-010-626511X105 INTERCHANGEABLE
Washer,flat
Pdi Ground Support Systems, Inc.
5330-00-069-564516387 INTERCHANGEABLE
Gasket
Mine Safety Appliances Company
5331-00-071-8000L3006-22 INTERCHANGEABLE
O-Ring
Parker Hannifin Corporation Div Cylinder Division
6625-00-089-6701 INTERCHANGEABLE
Meter,null
4030-00-089-7012 INTERCHANGEABLE
Anchor,guy
1610-00-119-663150416 INTERCHANGEABLE
Piston,hydromatic P
Hamilton Sundstrand Corporation Dba Collins Aerospace
4820-00-136-4544 INTERCHANGEABLE
Seat,valve
9150-00-149-1592 INTERCHANGEABLE
Grease,ball and Roller Bearing
6625-00-165-2116841-15788 INTERCHANGEABLE
Ammeter
Phaostron Instrument and Electronic Company
5310-00-185-6345 INTERCHANGEABLE
Nut,plain,round
Cross-Reference Index
Part NumberManufacturer
A997CPC30A Waterous Company (USA)
35518PC14 Stone Safety Corp (USA)
D6991REVBPC33 Ilg Industries Inc (USA)
309447 Kenosha Automotive Plant Sub of American Motors Corp (USA)
29276KPC14 Stone Safety Corp (USA)
41-222-631PC99 Patterson Pump Co Div Patterson Pump Company (USA)
D8296REVAPC36 Ilg Industries Inc (USA)
124-4322603 PC 83 Naval Sea Systems Command (USA)
W12 Fag Bearings Corporation (USA)
D8159PC33 Ilg Industries Inc (USA)
D7897REVBPC36 Ilg Industries Inc (USA)
31864PC9 Louis Allis Co the This Company Has Gone Bankrupt and Has Been Purchased by 3 Companies (USA)
D7743REVAPC33 Ilg Industries Inc (USA)
24277PC6 Stone Safety Corp (USA)
G378831PC51 Elliott Company Div Jeannette (USA)
C84399BNPC410 New York Naval Shipyard Naval Base (USA)
E2884PC156 Terry Corp of Connecticut Sub of Ingersoll-Rand Co (USA)
72-6971-362 Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco (USA)
30854PC35 Stone Safety Corp (USA)
10258 Phoenix Steel Corp (USA)
Related Parts
5310-00-010-6265INTERCHANGEABLE
WASHER,FLAT
11X105
5330-00-069-5645INTERCHANGEABLE
GASKET
16387
5331-00-071-8000INTERCHANGEABLE
O-RING
L3006-22
6625-00-089-6701INTERCHANGEABLE
METER,NULL
4030-00-089-7012INTERCHANGEABLE
ANCHOR,GUY
1610-00-119-6631INTERCHANGEABLE
PISTON,HYDROMATIC P
50416
4820-00-136-4544INTERCHANGEABLE
SEAT,VALVE
9150-00-149-1592INTERCHANGEABLE
GREASE,BALL AND ROLLER BEARING
6625-00-165-2116INTERCHANGEABLE
AMMETER
841-15788
5310-00-185-6345INTERCHANGEABLE
NUT,PLAIN,ROUND
5962-00-193-5036INTERCHANGEABLE
MICROCIRCUIT,LINEAR
643558-001
9905-00-209-4531INTERCHANGEABLE
BAND,MARKER
940100-2

Frequently Asked Questions

What is NSN 5310-00-186-0971?

NSN 5310-00-186-0971 is a Washer,key, manufactured by Waterous Company, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-186-0971?

NSN 5310-00-186-0971 has 50 cross-referenced part numbers: A997CPC30A (Waterous Company), 35518PC14 (Stone Safety Corp), D6991REVBPC33 (Ilg Industries Inc), 309447 (Kenosha Automotive Plant Sub of American Motors Corp), 29276KPC14 (Stone Safety Corp) and 45 more.

What NSN replaces 5310-00-186-0971?

There are 12 known substitutes for 5310-00-186-0971: 5310-00-010-6265, 5330-00-069-5645, 5331-00-071-8000 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A997CPC30A?

Key specifications for A997CPC30A: Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL; External Prebent Key Width: 0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN; Material: 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; Outside Diameter: 2.844 INCHES MINIMUM AND 2.874 INCHES MAXIMUM IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-186-0971 still in active supply?

NSN 5310-00-186-0971 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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