PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B-400-61Nipple,tube

Swagelok Co · NSN 4730-00-061-6912 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-061-6912 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-061-6912. Primary manufacturer part number: B-400-61.
Features
  • Nipple,tube — FSC 4730
  • Thread Series Designator: UNF ALL ENDS
  • Material: COPPER ALLOY OVERALL
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES ALL ENDS IN
  • Nominal Overall Length: 2.270 INCHES IN
  • Seat Angle: 20.0 DEGREES ALL ENDS
  • Nominal Thread Size: 0.438 INCHES ALL ENDS IN
  • Furnished Items and Quantity: 4 FERRULE SLEEVE AND 2 TUBE COUPLING NUT AND 1 LOCKNUT
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Nipple,tube, cataloged under National Stock Number 4730-00-061-6912, 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 Swagelok Co. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-061-6912
Primary Part NumberB-400-61
Item NameNipple,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerSwagelok Co
StatusCANCELLED
Thread Series DesignatorUNF ALL ENDS
MaterialCOPPER ALLOY OVERALL
Nominal Outside Diameter Tube Accommodated0.250 INCHES ALL ENDS IN
Nominal Overall Length2.270 INCHES IN
Seat Angle20.0 DEGREES ALL ENDS
Nominal Thread Size0.438 INCHES ALL ENDS IN
Furnished Items and Quantity4 FERRULE SLEEVE AND 2 TUBE COUPLING NUT AND 1 LOCKNUT
Style DesignatorFLARELESS W/ OFFSET WRENCHING FACILITY
Nominal Thread Size0.438 INCHES CENTER BULKHEAD IN
Connection StyleFLARELESS (TUBE) ALL ENDS
Thread Class2A CENTER BULKHEAD A
Thread Series DesignatorUNF CENTER BULKHEAD
Thread Class2A ALL ENDS A
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-157-0610AA-3614 INTERCHANGEABLE
Bearing,roller,needle
Rbc Aircraft Products, Inc.
3455-00-505-02381747-0187 INTERCHANGEABLE
Cutter,milling,end
New York Twist Drill Inc
4730-00-507-7297 INTERCHANGEABLE
Reducer,tube
4820-00-849-1220 INTERCHANGEABLE
Cock,drain
5305-00-901-3109 INTERCHANGEABLE
Screw,wood
2520-00-912-458840061 INTERCHANGEABLE
Differential,driving Axle
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
7025-01-029-01784006-1 INTERCHANGEABLE
Display Unit
Tektronix, Inc.
4810-01-086-5757100116-003 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Woodward, Inc. Div Fuel Systems and Controls
3020-01-122-649740061 INTERCHANGEABLE
Pulley,groove
Sabre Engines Ltd
5330-01-304-243040061-1 INTERCHANGEABLE
Retainer,packing
Ameridrives International Llc Dba Ameridrives International Llc
Cross-Reference Index
Part NumberManufacturer
4-4 WBZ-B Parker-Hannifin Corporation Div Instrumentation Products Division (USA)
100116-003 North Wind Test Llc (USA)
4BU Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA)
R BC 4 Parker-Hannifin Corporation Div Instrumentation Products Division (USA)
B-400-61 PRIMARY Swagelok Co (USA)
400-61 PRIMARY Swagelok Co (USA)
4BU J R Douglass Company (USA)
Related Parts
3110-00-157-0610INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
AA-3614
3455-00-505-0238INTERCHANGEABLE
CUTTER,MILLING,END
1747-0187
4730-00-507-7297INTERCHANGEABLE
REDUCER,TUBE
4820-00-849-1220INTERCHANGEABLE
COCK,DRAIN
5305-00-901-3109INTERCHANGEABLE
SCREW,WOOD
2520-00-912-4588INTERCHANGEABLE
DIFFERENTIAL,DRIVING AXLE
40061
7025-01-029-0178INTERCHANGEABLE
DISPLAY UNIT
4006-1
4810-01-086-5757INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
100116-003
3020-01-122-6497INTERCHANGEABLE
PULLEY,GROOVE
40061
5330-01-304-2430INTERCHANGEABLE
RETAINER,PACKING
40061-1
4940-01-336-5017INTERCHANGEABLE
NOZZLE,HEATER,GUN TYPE,ELECTRICA
40061
4730-01-347-4689INTERCHANGEABLE
TAILPIECE,UNION

Frequently Asked Questions

What is NSN 4730-00-061-6912?

NSN 4730-00-061-6912 is a Nipple,tube, manufactured by Swagelok Co, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-061-6912?

NSN 4730-00-061-6912 has 7 cross-referenced part numbers: 4-4 WBZ-B (Parker-Hannifin Corporation Div Instrumentation Products Division), 100116-003 (North Wind Test Llc), 4BU (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), R BC 4 (Parker-Hannifin Corporation Div Instrumentation Products Division), B-400-61 (Swagelok Co) and 2 more.

What NSN replaces 4730-00-061-6912?

There are 12 known substitutes for 4730-00-061-6912: 3110-00-157-0610, 3455-00-505-0238, 4730-00-507-7297 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B-400-61?

Key specifications for B-400-61: Thread Series Designator: UNF ALL ENDS; Material: COPPER ALLOY OVERALL; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES ALL ENDS IN; Nominal Overall Length: 2.270 INCHES IN. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-061-6912 still in active supply?

NSN 4730-00-061-6912 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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