PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

73104Ring,piston

Kaydon Ring & Seal Inc Dba Skf Precision Technologies · NSN 3040-00-803-4691 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-00-803-4691 — this item is cataloged by the U.S. Government under National Stock Number 3040-00-803-4691. Primary manufacturer part number: 73104.
Features
  • Ring,piston — FSC 3040
  • Surface Treatment: ANODIZE OVERALL
  • Material: STEEL OVERALL
  • Radial Wall Thickness: 0.0940 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE
  • Ring Style: CONCENTRIC
  • Standard Bore Diameter: 3.375 INCHES IN
  • Joint Style: STEP JOINT
Applications
  • Applications requiring Steel Overall construction
General Description

The Ring,piston, cataloged under National Stock Number 3040-00-803-4691, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Kaydon Ring & Seal Inc Dba Skf Precision Technologies. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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
NSN3040-00-803-4691
Primary Part Number73104
Item NameRing,piston
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerKaydon Ring & Seal Inc Dba Skf Precision Technologies
StatusCANCELLED
Surface TreatmentANODIZE OVERALL
MaterialSTEEL OVERALL
Radial Wall Thickness0.0940 INCHES NOMINAL IN
Cross-Sectional Shape StylePLAIN RECTANGULAR, STRAIGHT FACE
Ring StyleCONCENTRIC
Standard Bore Diameter3.375 INCHES IN
Joint StyleSTEP JOINT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5962-00-251-8878SMC750104 INTERCHANGEABLE
Microcircuit,digital
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
2010-00-423-46464C531 INTERCHANGEABLE
Cone,friction
Allard Nazarian Group, Inc. Dba Granite State Manufacturing
2530-00-454-50123004549 INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
Chrysler Realty Company Llc Dba Daimler Chrysler
3030-00-528-3796 INTERCHANGEABLE
Belt,v
6930-00-904-263073-104 INTERCHANGEABLE
Servo Valve
Moog Inc
5950-00-972-1312 INTERCHANGEABLE
Transformer,power
5330-00-973-82336857 INTERCHANGEABLE
Packing,preformed
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5330-00-995-0698 INTERCHANGEABLE
Gasket
4820-01-103-422773A-104-27A INTERCHANGEABLE
Valve,ball
Aalberts Integrated Piping Systems Americas, Inc.
2920-01-280-41446857 INTERCHANGEABLE
Lead Set,ignition,engine
Standard Motor Products
Cross-Reference Index
Part NumberManufacturer
73104 PRIMARY Kaydon Ring & Seal Inc Dba Skf Precision Technologies (USA)
9121-10 Aerco International, Inc. Dba Aerco International Inc (USA)
6857 Aerco International, Inc. Dba Aerco International Inc (USA)
Related Parts
5962-00-251-8878INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
SMC750104
2010-00-423-4646INTERCHANGEABLE
CONE,FRICTION
4C531
2530-00-454-5012INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
3004549
3030-00-528-3796INTERCHANGEABLE
BELT,V
6930-00-904-2630INTERCHANGEABLE
SERVO VALVE
73-104
5950-00-972-1312INTERCHANGEABLE
TRANSFORMER,POWER
5330-00-973-8233INTERCHANGEABLE
PACKING,PREFORMED
6857
5330-00-995-0698INTERCHANGEABLE
GASKET
4820-01-103-4227INTERCHANGEABLE
VALVE,BALL
73A-104-27A
2920-01-280-4144INTERCHANGEABLE
LEAD SET,IGNITION,ENGINE
6857
5963-01-282-7118INTERCHANGEABLE
REGULATOR,VOLTAGE
4820-01-419-7916INTERCHANGEABLE
CONE,VALVE
7310400

Frequently Asked Questions

What is NSN 3040-00-803-4691?

NSN 3040-00-803-4691 is a Ring,piston, manufactured by Kaydon Ring & Seal Inc Dba Skf Precision Technologies, classified under FSC 3040 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3040-00-803-4691?

NSN 3040-00-803-4691 has 3 cross-referenced part numbers: 73104 (Kaydon Ring & Seal Inc Dba Skf Precision Technologies), 9121-10 (Aerco International, Inc. Dba Aerco International Inc), 6857 (Aerco International, Inc. Dba Aerco International Inc).

What NSN replaces 3040-00-803-4691?

There are 12 known substitutes for 3040-00-803-4691: 5962-00-251-8878, 2010-00-423-4646, 2530-00-454-5012 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 73104?

Key specifications for 73104: Overall Width: 0.0920 INCHES NOMINAL IN; Surface Treatment: ANODIZE OVERALL; Material: STEEL OVERALL; Radial Wall Thickness: 0.0940 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3040-00-803-4691 still in active supply?

NSN 3040-00-803-4691 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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