PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1655798-11Adapter,straight,pipe to Tube

Lenz Inc Dba the Lenz Company · NSN 4730-00-709-8681 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-709-8681 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-709-8681. Primary manufacturer part number: 1655798-11.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Thread Series Designator: UNF FIRST END
  • Material: STEEL COMP 1118 OVERALL
  • Nominal Thread Size: 0.250 INCHES SECOND END IN
  • Connection Style: GASKET SEAL, COMPRESSION (TUBE) FIRST END
  • Nominal Thread Size: 0.875 INCHES FIRST END IN
  • Furnished Items and Quantity: 1 SHORT COUPLING NUT AND 1 FLAT WASHER AND 1 SPLIT COLLET SLEEVE
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 1118 Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-709-8681, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Lenz Inc Dba the Lenz Company. Government technical data includes 18 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: Active.

Technical Specifications
ParameterValue
NSN4730-00-709-8681
Primary Part Number1655798-11
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerLenz Inc Dba the Lenz Company
StatusACTIVE
Thread Series DesignatorUNF FIRST END
MaterialSTEEL COMP 1118 OVERALL
Nominal Thread Size0.250 INCHES SECOND END IN
Connection StyleGASKET SEAL, COMPRESSION (TUBE) FIRST END
Nominal Thread Size0.875 INCHES FIRST END IN
Furnished Items and Quantity1 SHORT COUPLING NUT AND 1 FLAT WASHER AND 1 SPLIT COLLET SLEEVE
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Nominal Overall Length1.875 INCHES IN
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Maximum Operating Temp135.0 FAHRENHEIT SINGLE RESPONSE DEGF
Thread Series DesignatorNPTF SECOND END
Nominal Outside Diameter Tube Accommodated0.500 INCHES FIRST END IN
Thread Class2A FIRST END A
Connection StylePLAIN (PIPE) SECOND END
Surface Treatment Document and ClassificationMIL-C-16232,TY Z,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPHOSPHATE OVERALL
Operating Pressure2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-149-00632B3202 INTERCHANGEABLE
Gasket
Caterpillar Inc Div Caterpillar Defense
5120-00-180-078610084 INTERCHANGEABLE
Extractor,tap
Walton Co the
5305-00-208-0076125330 INTERCHANGEABLE
Screw,machine
Telemechanics Inc
5133-00-228-1369 INTERCHANGEABLE
Drill,twist
9540-00-580-6245 INTERCHANGEABLE
Angle,structural
5905-00-644-555425953-3-1 INTERCHANGEABLE
Resistor,adjustable
Ward Leonard Ct Llc
5910-00-788-03480831000X5F0 101K INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Murata Erie North America Inc Headquarters and Georgia Opns
4935-00-978-978210084 INTERCHANGEABLE
Holder Assembly
Drs C3 & Aviation Company Dba Drs Data & Imaging Systems
5330-01-039-4111 INTERCHANGEABLE
Gasket
1377-01-046-77831008-4 INTERCHANGEABLE
Initiator,cartridge Actuated
Rockwell Collins Inc
Cross-Reference Index
Part NumberManufacturer
1655798-11 PRIMARY Lenz Inc Dba the Lenz Company (USA)
100-8-4 Lenz Inc Dba the Lenz Company (USA)
1655798-11 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
5330-00-149-0063INTERCHANGEABLE
GASKET
2B3202
5120-00-180-0786INTERCHANGEABLE
EXTRACTOR,TAP
10084
5305-00-208-0076INTERCHANGEABLE
SCREW,MACHINE
125330
5133-00-228-1369INTERCHANGEABLE
DRILL,TWIST
9540-00-580-6245INTERCHANGEABLE
ANGLE,STRUCTURAL
5905-00-644-5554INTERCHANGEABLE
RESISTOR,ADJUSTABLE
25953-3-1
5910-00-788-0348INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
0831000X5F0 101K
4935-00-978-9782INTERCHANGEABLE
HOLDER ASSEMBLY
10084
5330-01-039-4111INTERCHANGEABLE
GASKET
1377-01-046-7783INTERCHANGEABLE
INITIATOR,CARTRIDGE ACTUATED
1008-4
5962-01-093-5702INTERCHANGEABLE
MICROCIRCUIT,DIGITAL-LINEAR
3271041-1
5950-01-207-8393INTERCHANGEABLE
COIL,RADIO FREQUENCY
6628-0517

Frequently Asked Questions

What is NSN 4730-00-709-8681?

NSN 4730-00-709-8681 is a Adapter,straight,pipe to Tube, manufactured by Lenz Inc Dba the Lenz Company, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-709-8681?

NSN 4730-00-709-8681 has 3 cross-referenced part numbers: 1655798-11 (Lenz Inc Dba the Lenz Company), 100-8-4 (Lenz Inc Dba the Lenz Company), 1655798-11 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 4730-00-709-8681?

There are 12 known substitutes for 4730-00-709-8681: 5330-00-149-0063, 5120-00-180-0786, 5305-00-208-0076 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1655798-11?

Key specifications for 1655798-11: Thread Series Designator: UNF FIRST END; Material: STEEL COMP 1118 OVERALL; Nominal Thread Size: 0.250 INCHES SECOND END IN; Connection Style: GASKET SEAL, COMPRESSION (TUBE) FIRST END. 19 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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