PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C309-3Sleeve,seal,coupler

Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company · NSN 5330-00-440-1520 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-440-1520 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-440-1520. Primary manufacturer part number: C309-3.
Features
  • Sleeve,seal,coupler — FSC 5330
  • Material: RUBBER SILICONE CLASS Q OVERALL
  • Cross-Sectional Shape Style: SPHERICAL
  • Cross Section Inside Diameter: 1.030 INCHES NOMINAL IN
  • Cross Section Outside Diameter: 1.167 INCHES NOMINAL IN
  • Cross-Sectional Length: 0.870 INCHES NOMINAL IN
  • 6 verified cross-references
  • Primary manufacturer: Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Silicone Class Q Overall construction
General Description

The Sleeve,seal,coupler, cataloged under National Stock Number 5330-00-440-1520, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-00-440-1520
Primary Part NumberC309-3
Item NameSleeve,seal,coupler
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Lockheed Martin Aeronautics Company
StatusACTIVE
MaterialRUBBER SILICONE CLASS Q OVERALL
Cross-Sectional Shape StyleSPHERICAL
Cross Section Inside Diameter1.030 INCHES NOMINAL IN
Cross Section Outside Diameter1.167 INCHES NOMINAL IN
Cross-Sectional Length0.870 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4320-01-197-201712268-2 INTERCHANGEABLE
Ring,wearing
Air & Liquid Systems Corporation Dba Buffalo Pumps
Cross-Reference Index
Part NumberManufacturer
12268-2 American Safety Flight Systems Inc (USA)
5330PL1668864 Jednolity Indeks Materialowy - Uniform Material Index (POL)
12268-2 Conax Florida Corporation (USA)
5330PL0549697 Jednolity Indeks Materialowy - Uniform Material Index (POL)
C309-3 PRIMARY Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
REDARC10715-2 R.e. Darling Co., Inc. (USA)
Related Parts
4320-01-197-2017INTERCHANGEABLE
RING,WEARING
12268-2

Frequently Asked Questions

What is NSN 5330-00-440-1520?

NSN 5330-00-440-1520 is a Sleeve,seal,coupler, manufactured by Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-440-1520?

NSN 5330-00-440-1520 has 6 cross-referenced part numbers: 12268-2 (American Safety Flight Systems Inc), 5330PL1668864 (Jednolity Indeks Materialowy - Uniform Material Index), 12268-2 (Conax Florida Corporation), 5330PL0549697 (Jednolity Indeks Materialowy - Uniform Material Index), C309-3 (Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company) and 1 more.

What NSN replaces 5330-00-440-1520?

There is 1 known substitute for 5330-00-440-1520: 4320-01-197-2017. Verify interchangeability with system specifications before substitution.

What are the specifications of C309-3?

Key specifications for C309-3: Material: RUBBER SILICONE CLASS Q OVERALL; Cross-Sectional Shape Style: SPHERICAL; Cross Section Inside Diameter: 1.030 INCHES NOMINAL IN; Cross Section Outside Diameter: 1.167 INCHES NOMINAL IN. 5 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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