PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4321-01Adapter,straight,tube to Boss

Naval Ship Engineering Center Philadelphia Div · NSN 4730-01-086-9953 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-086-9953 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-086-9953. Primary manufacturer part number: 4321-01.
Features
  • Adapter,straight,tube to Boss — FSC 4730
  • Thread Quantity Per Inch: 16 SECOND END
  • Connection Type: THREADED INTERNAL TUBE FIRST END
  • Nominal Thread Size: 1.312 INCHES SECOND END IN
  • Thread Quantity Per Inch: 12 FIRST END
  • Thread Class: 2A SECOND END A
  • Connection Style: FLARED (TUBE) FIRST END
  • Nominal Overall Length: 3.625 INCHES IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Overall construction
General Description

The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-086-9953, 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 Naval Ship Engineering Center Philadelphia Div. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, 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
NSN4730-01-086-9953
Primary Part Number4321-01
Item NameAdapter,straight,tube to Boss
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerNaval Ship Engineering Center Philadelphia Div
StatusACTIVE
Thread Quantity Per Inch16 SECOND END
Connection TypeTHREADED INTERNAL TUBE FIRST END
Nominal Thread Size1.312 INCHES SECOND END IN
Thread Quantity Per Inch12 FIRST END
Thread Class2A SECOND END A
Connection StyleFLARED (TUBE) FIRST END
Nominal Overall Length3.625 INCHES IN
Nominal Outside Diameter Tube Accommodated1.062 INCHES FIRST END IN
Nominal Thread Size1.750 INCHES FIRST END IN
Thread Class2B FIRST END
Connection TypeTHREADED EXTERNAL BOSS SECOND END
Thread Series DesignatorUN ALL ENDS
Connection StyleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
MaterialSTEEL OVERALL
Material Document and ClassificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5940-00-215-5962 INTERCHANGEABLE
Terminal Box
5133-00-253-54584321-0046 INTERCHANGEABLE
Drill,twist
New York Twist Drill Inc
6685-00-530-0339607112020 INTERCHANGEABLE
Pyrometer,indicating
Alnor Instrument Company
5905-00-549-972138773 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5305-00-638-8666A4321 INTERCHANGEABLE
Screw,machine
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5133-00-841-870331004 INTERCHANGEABLE
Drill,twist
Precision Twist Drill Co
5305-00-952-11934321 INTERCHANGEABLE
Screw,shoulder
Roller Bearing Co of America, Inc Div Pic Design
5910-01-118-0305P09ZNR601-805K INTERCHANGEABLE
Capacitor,fixed,metallized,paper
Kyocera Avx Components Corporation
1730-01-126-17524312 INTERCHANGEABLE
Winch,dragchute Stand
Thern Inc
6515-01-168-00054321 INTERCHANGEABLE
Bag,ostomy
C. R. Bard, Inc.
Cross-Reference Index
Part NumberManufacturer
4321-01 Naval Ship Engineering Center Philadelphia Div (USA)
4382PC14 Naval Ship Engineering Center Philadelphia Div (USA)
4321 Naval Ship Engineering Center Philadelphia Div (USA)
Related Parts
5940-00-215-5962INTERCHANGEABLE
TERMINAL BOX
5133-00-253-5458INTERCHANGEABLE
DRILL,TWIST
4321-0046
6685-00-530-0339INTERCHANGEABLE
PYROMETER,INDICATING
607112020
5905-00-549-9721INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
38773
5305-00-638-8666INTERCHANGEABLE
SCREW,MACHINE
A4321
5133-00-841-8703INTERCHANGEABLE
DRILL,TWIST
31004
5305-00-952-1193INTERCHANGEABLE
SCREW,SHOULDER
4321
5910-01-118-0305INTERCHANGEABLE
CAPACITOR,FIXED,METALLIZED,PAPER
P09ZNR601-805K
1730-01-126-1752INTERCHANGEABLE
WINCH,DRAGCHUTE STAND
4312
6515-01-168-0005INTERCHANGEABLE
BAG,OSTOMY
4321
5305-01-200-9706INTERCHANGEABLE
SCREW,SHOULDER
4321
5330-01-695-1201INTERCHANGEABLE
GASKET SET
4321

Frequently Asked Questions

What is NSN 4730-01-086-9953?

NSN 4730-01-086-9953 is a Adapter,straight,tube to Boss, manufactured by Naval Ship Engineering Center Philadelphia Div, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-086-9953?

NSN 4730-01-086-9953 has 3 cross-referenced part numbers: 4321-01 (Naval Ship Engineering Center Philadelphia Div), 4382PC14 (Naval Ship Engineering Center Philadelphia Div), 4321 (Naval Ship Engineering Center Philadelphia Div).

What NSN replaces 4730-01-086-9953?

There are 12 known substitutes for 4730-01-086-9953: 5940-00-215-5962, 5133-00-253-5458, 6685-00-530-0339 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4321-01?

Key specifications for 4321-01: Thread Quantity Per Inch: 16 SECOND END; Connection Type: THREADED INTERNAL TUBE FIRST END; Nominal Thread Size: 1.312 INCHES SECOND END IN; Thread Quantity Per Inch: 12 FIRST END. 15 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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