PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

312-117ASeal Ring Assembly,labyrinth

Steward Machine Co Inc · NSN 2825-00-769-7377 · FSC 2825 · No Item Name Available
Verified by PartsTable
NSN 2825-00-769-7377 — this item is cataloged by the U.S. Government under National Stock Number 2825-00-769-7377. Primary manufacturer part number: 312-117A.
Features
  • Seal Ring Assembly,labyrinth — FSC 2825
  • Material: COPPER ALLOY OVERALL
  • Outside Diameter: 4.375 INCHES NOMINAL4.375 INCHES NOMINAL IN
  • Height: 1.468 INCHES NOMINAL1.468 INCHES NOMINAL IN
  • Inside Diameter: 3.546 INCHES NOMINAL3.546 INCHES NOMINAL IN
  • 14 verified cross-references
  • Primary manufacturer: Steward Machine Co Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Copper Alloy Overall construction
General Description

The Seal Ring Assembly,labyrinth, cataloged under National Stock Number 2825-00-769-7377, is classified within Federal Supply Class 2825 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Steward Machine Co Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 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: Cancelled.

Technical Specifications
ParameterValue
NSN2825-00-769-7377
Primary Part Number312-117A
Item NameSeal Ring Assembly,labyrinth
FSC / FSG2825 / 28 — No Item Name Available
ManufacturerSteward Machine Co Inc
StatusCANCELLED
MaterialCOPPER ALLOY OVERALL
Outside Diameter4.375 INCHES NOMINAL4.375 INCHES NOMINAL IN
Height1.468 INCHES NOMINAL1.468 INCHES NOMINAL IN
Inside Diameter3.546 INCHES NOMINAL3.546 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
2825-00-317-432950-107 INTERCHANGEABLE
Labyrinth,packing
Steward Machine Co Inc
3110-00-734-8768A6294 INTERCHANGEABLE
Ball,bearing
Am General Llc
5999-00-824-76841250-0771 INTERCHANGEABLE
Contact,electrical
Keysight Technologies Inc
5950-01-127-8676312-117 INTERCHANGEABLE
Transformer,power
B.c. Systems Inc. Dba Bc Systems Inc
2825-01-196-3940577A1 INTERCHANGEABLE
Casing,labyrinth
Steward Machine Co Inc
5330-01-229-7170N0552 2-360 INTERCHANGEABLE
Packing,preformed
Parker-Hannifin Corp Div O-Ring Division
5310-01-257-898460577 INTERCHANGEABLE
Nut
Tld Ace Corp Div Tld Ace
2805-01-277-371760577 INTERCHANGEABLE
Mount Silencer Brac
Brunswick Corp Dba Mercury Marine Div Mercury Marine
Cross-Reference Index
Part NumberManufacturer
L-2159 Rps-Fl, Inc. Dba Rps Inc (USA)
60-577 Hardie-Tynes Co., Inc. (USA)
312-117A Hardie-Tynes Co., Inc. (USA)
60-521PC117 Hardie-Tynes Co., Inc. (USA)
60-577PC117 Hardie-Tynes Co., Inc. (USA)
60-606PC117 Hardie-Tynes Co., Inc. (USA)
577-117 Hardie-Tynes Co., Inc. (USA)
312-117A PRIMARY Steward Machine Co Inc (USA)
60-606 Hardie-Tynes Co., Inc. (USA)
60-312PC117 Hardie-Tynes Co., Inc. (USA)
60-405PC117 Hardie-Tynes Co., Inc. (USA)
312-117 Hardie-Tynes Co., Inc. (USA)
64-306PC117 Hardie-Tynes Co., Inc. (USA)
60-401PC117 Hardie-Tynes Co., Inc. (USA)
Related Parts
2825-00-317-4329INTERCHANGEABLE
LABYRINTH,PACKING
50-107
3110-00-734-8768INTERCHANGEABLE
BALL,BEARING
A6294
5999-00-824-7684INTERCHANGEABLE
CONTACT,ELECTRICAL
1250-0771
5950-01-127-8676INTERCHANGEABLE
TRANSFORMER,POWER
312-117
2825-01-196-3940INTERCHANGEABLE
CASING,LABYRINTH
577A1
5330-01-229-7170INTERCHANGEABLE
PACKING,PREFORMED
N0552 2-360
5310-01-257-8984INTERCHANGEABLE
NUT
60577
2805-01-277-3717INTERCHANGEABLE
MOUNT SILENCER BRAC
60577

Frequently Asked Questions

What is NSN 2825-00-769-7377?

NSN 2825-00-769-7377 is a Seal Ring Assembly,labyrinth, manufactured by Steward Machine Co Inc, classified under FSC 2825 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2825-00-769-7377?

NSN 2825-00-769-7377 has 14 cross-referenced part numbers: L-2159 (Rps-Fl, Inc. Dba Rps Inc), 60-577 (Hardie-Tynes Co., Inc.), 312-117A (Hardie-Tynes Co., Inc.), 60-521PC117 (Hardie-Tynes Co., Inc.), 60-577PC117 (Hardie-Tynes Co., Inc.) and 9 more.

What NSN replaces 2825-00-769-7377?

There are 8 known substitutes for 2825-00-769-7377: 2825-00-317-4329, 3110-00-734-8768, 5999-00-824-7684 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 312-117A?

Key specifications for 312-117A: Material: COPPER ALLOY OVERALL; Outside Diameter: 4.375 INCHES NOMINAL4.375 INCHES NOMINAL IN; Height: 1.468 INCHES NOMINAL1.468 INCHES NOMINAL IN; Inside Diameter: 3.546 INCHES NOMINAL3.546 INCHES NOMINAL IN. 4 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2825-00-769-7377 still in active supply?

NSN 2825-00-769-7377 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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