PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1008991Piston Assembly

Ontic Engineering & Manufacturing, Inc Dba Ontic Us · NSN 4320-00-073-7716 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-073-7716 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-073-7716. Primary manufacturer part number: 1008991.
Features
  • Piston Assembly — FSC 4320
  • 4 verified cross-references
  • Primary manufacturer: Ontic Engineering & Manufacturing, Inc Dba Ontic Us
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Piston Assembly, cataloged under National Stock Number 4320-00-073-7716, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-073-7716
Primary Part Number1008991
Item NamePiston Assembly
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerOntic Engineering & Manufacturing, Inc Dba Ontic Us
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5305-00-010-0869100869 INTERCHANGEABLE
Screw,machine
Chrysler Realty Company Llc Dba Daimler Chrysler
6605-00-074-2431100899 INTERCHANGEABLE
Support,bearing,short
Astronautics Corporation of America
3040-00-360-52789131 INTERCHANGEABLE
Shaft,straight
Clayton Manufacturing Company
1680-00-773-6602100899 INTERCHANGEABLE
Rod End Assembly
Tactair Fluid Controls Inc Western Hydraulics Div
1005-00-934-1829100899 INTERCHANGEABLE
Knob,gearbox,turret
Cadillac Gage Textron Inc.
4820-01-467-5550100899 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Dh Instruments Inc.
4320-01-522-7246100899 INTERCHANGEABLE
Pump,reciprocating
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
6110-01-558-1017100899 INTERCHANGEABLE
Panel,control,electrical-Electro
Doubleday Acquisitions, Llc Dba Double Day Acquisitions Llc
Cross-Reference Index
Part NumberManufacturer
1008991 PRIMARY Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
1008991 Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA)
1008991 Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div (USA)
100899 Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA)
Related Parts
5305-00-010-0869INTERCHANGEABLE
SCREW,MACHINE
100869
6605-00-074-2431INTERCHANGEABLE
SUPPORT,BEARING,SHORT
100899
3040-00-360-5278INTERCHANGEABLE
SHAFT,STRAIGHT
9131
1680-00-773-6602INTERCHANGEABLE
ROD END ASSEMBLY
100899
1005-00-934-1829INTERCHANGEABLE
KNOB,GEARBOX,TURRET
100899
4820-01-467-5550INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
100899
4320-01-522-7246INTERCHANGEABLE
PUMP,RECIPROCATING
100899
6110-01-558-1017INTERCHANGEABLE
PANEL,CONTROL,ELECTRICAL-ELECTRO
100899

Frequently Asked Questions

What is NSN 4320-00-073-7716?

NSN 4320-00-073-7716 is a Piston Assembly, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-073-7716?

NSN 4320-00-073-7716 has 4 cross-referenced part numbers: 1008991 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 1008991 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)), 1008991 (Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div), 100899 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).

What NSN replaces 4320-00-073-7716?

There are 8 known substitutes for 4320-00-073-7716: 5305-00-010-0869, 6605-00-074-2431, 3040-00-360-5278 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1008991?

Key specifications for 1008991: End Item Identification: MOORED TRAINING SHIP; Special Features: USED ON A RECIPROCATING PUMP FOR THE MTS TRAINING BOAT. 2 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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