PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31129Seal,plain Encased

Skf Usa Inc. Dba Skf Aerospace Sealing Solutions · NSN 5330-00-269-4140 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-269-4140 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-269-4140. Primary manufacturer part number: 31129.
Features
  • Seal,plain Encased — FSC 5330
  • Seal Width: 0.250 INCHES NOMINAL IN
  • Housing Bore Diameter: 3.751 INCHES NOMINAL IN
  • Outside Diameter: 3.756 INCHES NOMINAL IN
  • Case Style: SQUARE
  • Material: RUBBER SYNTHETIC SEALING ELEMENT
  • Accommodated Shaft Diameter: 3.125 INCHES NOMINAL IN
  • Material: STEEL CASE
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic Sealing Element construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-269-4140, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Skf Usa Inc. Dba Skf Aerospace Sealing Solutions. Government technical data includes 10 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-269-4140
Primary Part Number31129
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerSkf Usa Inc. Dba Skf Aerospace Sealing Solutions
StatusCANCELLED
Seal Width0.250 INCHES NOMINAL IN
Housing Bore Diameter3.751 INCHES NOMINAL IN
Outside Diameter3.756 INCHES NOMINAL IN
Case StyleSQUARE
MaterialRUBBER SYNTHETIC SEALING ELEMENT
Accommodated Shaft Diameter3.125 INCHES NOMINAL IN
MaterialSTEEL CASE
Accommodated Shaft Maximum Rated Speed2000 FEET PER MINUTE FT
Sealing Element StyleANGULAR
Surface TreatmentPLASTIC CASE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
3110-00-100-3632230390 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
3455-00-476-0880 INTERCHANGEABLE
Cutter,milling,end
5133-00-841-859640737 INTERCHANGEABLE
Drill,twist
New York Twist Drill Inc
3040-00-858-050531129 INTERCHANGEABLE
Gearshaft,bevel
Integral Aerospace, Llc Dba Pcx Aerosystems - Santa Ana Div Integral Aerospace, Llc Dba Pcx Aerosystems - Santa Ana
5365-00-927-018410-306391-12 INTERCHANGEABLE
Ring,externally Threaded
Amphenol Corp Div Amphenol Aerospace Operations
6105-01-563-187531-129 INTERCHANGEABLE
Motor,alternating Current
Natural Gas Solutions North America Llc Div Industrial Products Group
6105-01-575-399931-129 INTERCHANGEABLE
Motor,alternating Current
Natural Gas Solutions North America Llc Div Industrial Products Group
Cross-Reference Index
Part NumberManufacturer
00044 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
31129 PRIMARY Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
375HD34 Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
Related Parts
3110-00-100-3632INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
230390
3455-00-476-0880INTERCHANGEABLE
CUTTER,MILLING,END
5133-00-841-8596INTERCHANGEABLE
DRILL,TWIST
40737
3040-00-858-0505INTERCHANGEABLE
GEARSHAFT,BEVEL
31129
5365-00-927-0184INTERCHANGEABLE
RING,EXTERNALLY THREADED
10-306391-12
6105-01-563-1875INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
31-129
6105-01-575-3999INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
31-129

Frequently Asked Questions

What is NSN 5330-00-269-4140?

NSN 5330-00-269-4140 is a Seal,plain Encased, manufactured by Skf Usa Inc. Dba Skf Aerospace Sealing Solutions, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-269-4140?

NSN 5330-00-269-4140 has 3 cross-referenced part numbers: 00044 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), 31129 (Skf Usa Inc. Dba Skf Aerospace Sealing Solutions), 375HD34 (Skf Usa Inc. Dba Skf Aerospace Sealing Solutions).

What NSN replaces 5330-00-269-4140?

There are 7 known substitutes for 5330-00-269-4140: 3110-00-100-3632, 3455-00-476-0880, 5133-00-841-8596 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31129?

Key specifications for 31129: Seal Width: 0.250 INCHES NOMINAL IN; Housing Bore Diameter: 3.751 INCHES NOMINAL IN; Outside Diameter: 3.756 INCHES NOMINAL IN; Case Style: SQUARE. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-269-4140 still in active supply?

NSN 5330-00-269-4140 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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