PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

81001Cylinder Sleeve

Brinkley Technology Group Llc Dba Hercules Manufacturing · NSN 2815-00-361-2721 · FSC 2815 · No Item Name Available
Verified by PartsTable
NSN 2815-00-361-2721 — this item is cataloged by the U.S. Government under National Stock Number 2815-00-361-2721. Primary manufacturer part number: 81001.
Features
  • Cylinder Sleeve — FSC 2815
  • Flange Thickness: 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
  • Top Inside Chamfer: NOT INCLUDED
  • Metallic Hardness Rating: 90.0 NOMINAL ROCKWELL B AND 95.0 NOMINAL ROCKWELL B
  • Design Type: DRY
  • Bottom Inside Chamfer: NOT INCLUDED
  • Bore Diameter: 4.373 INCHES MINIMUM AND 4.374 INCHES MAXIMUM IN
  • Intake Hole: NOT INCLUDED
Applications
  • Applications requiring Iron Cast construction
General Description

The Cylinder Sleeve, cataloged under National Stock Number 2815-00-361-2721, is classified within Federal Supply Class 2815 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 2 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
NSN2815-00-361-2721
Primary Part Number81001
Item NameCylinder Sleeve
FSC / FSG2815 / 28 — No Item Name Available
ManufacturerBrinkley Technology Group Llc Dba Hercules Manufacturing
StatusCANCELLED
Flange Thickness0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Top Inside ChamferNOT INCLUDED
Metallic Hardness Rating90.0 NOMINAL ROCKWELL B AND 95.0 NOMINAL ROCKWELL B
Design TypeDRY
Bottom Inside ChamferNOT INCLUDED
Bore Diameter4.373 INCHES MINIMUM AND 4.374 INCHES MAXIMUM IN
Intake HoleNOT INCLUDED
Flange Outside Diameter4.687 INCHES MINIMUM AND 4.690 INCHES MAXIMUM IN
Body Outside Diameter4.629 INCHES MINIMUM AND 4.630 INCHES MAXIMUM IN
Valve RecessINCLUDED
Top Intake PortNOT INCLUDED
MaterialIRON CAST
Style DesignatorDRY, FLANGED, RELIEVED
Material Document and ClassificationASTM,A48-48 ASSN STD SINGLE MATERIAL RESPONSE
FSC Application DataCYLINDER BLOCK GROUP,DIESEL ENGINE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5340-00-153-76688-1001 INTERCHANGEABLE
Clamp,synchro
Clark Material Handling Company
3040-00-538-15958100/1 INTERCHANGEABLE
Shaft,straight
Hayward Tyler Ltd
5310-00-541-020122F1-448 INTERCHANGEABLE
Nut,self-Locking,clinch
Sps Technologies, Llc Dba PB Fasteners
5945-01-012-8186247AS-C0567-001 INTERCHANGEABLE
Chopper,electronic
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5995-01-103-002181001-28 INTERCHANGEABLE
Lead,electrical
Jenny Products, Inc
5995-01-103-892981001-25 INTERCHANGEABLE
Lead,electrical
Hdt Expeditionary Systems Inc
5950-01-121-7877 INTERCHANGEABLE
Transformer,current
4820-01-145-5907458-50004-503 INTERCHANGEABLE
Valve,check
Meggitt North Hollywood Inc
6625-01-203-5722628-19288 INTERCHANGEABLE
Voltmeter
Phaostron Instrument and Electronic Company
3040-01-278-55558101 INTERCHANGEABLE
Piston,linear Actuating Cylinder
Greno Industries, Inc. Dba Greno Industries Inc
Cross-Reference Index
Part NumberManufacturer
81001 Hercules Engine Co Inc (USA)
80004C Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
81001 PRIMARY Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
81003C Hercules Engine Co Inc (USA)
81001-C Hercules Engine Co Inc (USA)
80004C Hercules Engine Co Inc (USA)
81001-C Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
Related Parts
5340-00-153-7668INTERCHANGEABLE
CLAMP,SYNCHRO
8-1001
3040-00-538-1595INTERCHANGEABLE
SHAFT,STRAIGHT
8100/1
5310-00-541-0201INTERCHANGEABLE
NUT,SELF-LOCKING,CLINCH
22F1-448
5945-01-012-8186INTERCHANGEABLE
CHOPPER,ELECTRONIC
247AS-C0567-001
5995-01-103-0021INTERCHANGEABLE
LEAD,ELECTRICAL
81001-28
5995-01-103-8929INTERCHANGEABLE
LEAD,ELECTRICAL
81001-25
5950-01-121-7877INTERCHANGEABLE
TRANSFORMER,CURRENT
4820-01-145-5907INTERCHANGEABLE
VALVE,CHECK
458-50004-503
6625-01-203-5722INTERCHANGEABLE
VOLTMETER
628-19288
3040-01-278-5555INTERCHANGEABLE
PISTON,LINEAR ACTUATING CYLINDER
8101
1680-01-481-9293INTERCHANGEABLE
LIGHT FORMATION,AIR
8100-1
1240-01-563-7476INTERCHANGEABLE
SIGHT,BORE,OPTICAL
8-1001

Frequently Asked Questions

What is NSN 2815-00-361-2721?

NSN 2815-00-361-2721 is a Cylinder Sleeve, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 2815 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2815-00-361-2721?

NSN 2815-00-361-2721 has 7 cross-referenced part numbers: 81001 (Hercules Engine Co Inc), 80004C (Brinkley Technology Group Llc Dba Hercules Manufacturing), 81001 (Brinkley Technology Group Llc Dba Hercules Manufacturing), 81003C (Hercules Engine Co Inc), 81001-C (Hercules Engine Co Inc) and 2 more.

What NSN replaces 2815-00-361-2721?

There are 12 known substitutes for 2815-00-361-2721: 5340-00-153-7668, 3040-00-538-1595, 5310-00-541-0201 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 81001?

Key specifications for 81001: Flange Thickness: 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Top Inside Chamfer: NOT INCLUDED; Metallic Hardness Rating: 90.0 NOMINAL ROCKWELL B AND 95.0 NOMINAL ROCKWELL B; Design Type: DRY. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2815-00-361-2721 still in active supply?

NSN 2815-00-361-2721 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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