PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11638Restrictor,fluid Flow

Elbitamerica, Inc. · NSN 4730-01-008-9644 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-008-9644 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-008-9644. Primary manufacturer part number: 11638.
Features
  • Restrictor,fluid Flow — FSC 4730
  • Material: COPPER ALLOY
  • Design Type: TUBULAR
  • Material Document and Classification: QQ-B-6260,1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE
  • Orifice Diameter: 0.193 INCHES NOMINAL IN
  • Thread Provision: UNTHREADED LOCATION NOT OTHERWISE SPECIFIED
  • Length: 0.547 INCHES MINIMUM AND 0.577 INCHES MAXIMUM IN
  • Outside Diameter: 1.000 INCHES NOMINAL IN
Applications
  • Applications requiring Copper Alloy construction
General Description

The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-008-9644, 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 Elbitamerica, Inc.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-008-9644
Primary Part Number11638
Item NameRestrictor,fluid Flow
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerElbitamerica, Inc.
StatusACTIVE
MaterialCOPPER ALLOY
Design TypeTUBULAR
Material Document and ClassificationQQ-B-6260,1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE
Orifice Diameter0.193 INCHES NOMINAL IN
Thread ProvisionUNTHREADED LOCATION NOT OTHERWISE SPECIFIED
Length0.547 INCHES MINIMUM AND 0.577 INCHES MAXIMUM IN
Outside Diameter1.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
9540-00-145-5815 INTERCHANGEABLE
Angle,structural
5940-00-177-79391163-3-8 INTERCHANGEABLE
Terminal,lug
Raytheon Company Dba Raytheon
2540-00-354-8752 INTERCHANGEABLE
Cushion,seat,vehicular
5945-00-430-357620-050-5 INTERCHANGEABLE
Relay,under Frequency
Te Connectivity Corporation
5136-00-528-229854761 INTERCHANGEABLE
Tap,thread Cutting
Tapco Cutting Tools Inc
5930-00-868-3022 INTERCHANGEABLE
Switch,toggle
5962-01-048-6860LM117KSTEEL/883B INTERCHANGEABLE
Microcircuit,linear
National Semiconductor Corporation
5950-01-090-5612 INTERCHANGEABLE
Transformer,pulse
3120-01-215-256211638 INTERCHANGEABLE
Bushing,sleeve
Leslie Controls, Inc. Dba Leslie Controls Inc
4140-01-305-9101 INTERCHANGEABLE
Housing,centrifugal Fan
Cross-Reference Index
Part NumberManufacturer
11638 PRIMARY Elbitamerica, Inc. (USA)
Related Parts
9540-00-145-5815INTERCHANGEABLE
ANGLE,STRUCTURAL
5940-00-177-7939INTERCHANGEABLE
TERMINAL,LUG
1163-3-8
2540-00-354-8752INTERCHANGEABLE
CUSHION,SEAT,VEHICULAR
5945-00-430-3576INTERCHANGEABLE
RELAY,UNDER FREQUENCY
20-050-5
5136-00-528-2298INTERCHANGEABLE
TAP,THREAD CUTTING
54761
5930-00-868-3022INTERCHANGEABLE
SWITCH,TOGGLE
5962-01-048-6860INTERCHANGEABLE
MICROCIRCUIT,LINEAR
LM117KSTEEL/883B
5950-01-090-5612INTERCHANGEABLE
TRANSFORMER,PULSE
3120-01-215-2562INTERCHANGEABLE
BUSHING,SLEEVE
11638
4140-01-305-9101INTERCHANGEABLE
HOUSING,CENTRIFUGAL FAN
8305-01-467-4552INTERCHANGEABLE
STYLE 116 FIBERGLAS

Frequently Asked Questions

What is NSN 4730-01-008-9644?

NSN 4730-01-008-9644 is a Restrictor,fluid Flow, manufactured by Elbitamerica, Inc., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-008-9644?

NSN 4730-01-008-9644 has 1 cross-referenced part number: 11638 (Elbitamerica, Inc.).

What NSN replaces 4730-01-008-9644?

There are 11 known substitutes for 4730-01-008-9644: 9540-00-145-5815, 5940-00-177-7939, 2540-00-354-8752 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11638?

Key specifications for 11638: Material: COPPER ALLOY; Design Type: TUBULAR; Material Document and Classification: QQ-B-6260,1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE; Orifice Diameter: 0.193 INCHES NOMINAL IN. 7 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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