PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RCSK-16885-2Reducer,tube

Am General Llc · NSN 4730-01-399-5546 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-399-5546 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-399-5546. Primary manufacturer part number: RCSK-16885-2.
Features
  • Reducer,tube — FSC 4730
  • Connection Style: PLAIN (TUBE) FIRST END
  • Material Document and Classification: MIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE GASKET
  • Material: RUBBER SYNTHETIC GASKET
  • Connection Style: GROOVED (TUBE) SECOND END
  • Nominal Outside Diameter Tube Accommodated: 0.500 INCHES FIRST END IN
  • Connection Type: UNTHREADED EXTERNAL TUBE FIRST END
  • Nominal Outside Diameter Tube Accommodated: 0.375 INCHES SECOND END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Rubber Synthetic Gasket construction
General Description

The Reducer,tube, cataloged under National Stock Number 4730-01-399-5546, 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 Am General Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 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
NSN4730-01-399-5546
Primary Part NumberRCSK-16885-2
Item NameReducer,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAm General Llc
StatusACTIVE
Connection StylePLAIN (TUBE) FIRST END
Material Document and ClassificationMIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE GASKET
MaterialRUBBER SYNTHETIC GASKET
Connection StyleGROOVED (TUBE) SECOND END
Nominal Outside Diameter Tube Accommodated0.500 INCHES FIRST END IN
Connection TypeUNTHREADED EXTERNAL TUBE FIRST END
Nominal Outside Diameter Tube Accommodated0.375 INCHES SECOND END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2910-00-104-881411086 INTERCHANGEABLE
Plunger,rotor
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5360-00-229-281411086 INTERCHANGEABLE
Spring,helical,compression
Mcculloch Corp
4730-00-263-2733SAE J530 2-2-2 130424B INTERCHANGEABLE
Tee,pipe
Sae International Dba Sae International
2915-00-413-472311-086 INTERCHANGEABLE
Thermal Element
Actronics Incorporated Dba Actronics Inc
6625-00-578-53401728750 INTERCHANGEABLE
Ammeter
Westinghouse Electric Corp
9540-00-612-6243 INTERCHANGEABLE
Beam,structural
6350-00-799-924311086 INTERCHANGEABLE
Diaphram
Leslie Controls, Inc. Dba Leslie Controls Inc
5999-01-003-2899 INTERCHANGEABLE
Shielding Gasket,electronic
5905-01-050-0377110-86 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Vishay Sprague Inc
5950-01-056-222711086 INTERCHANGEABLE
Transformer,audio Frequency
Standex Electronics, Inc.
Cross-Reference Index
Part NumberManufacturer
RCSK 16885-2 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
12448737 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
RCSK 16885 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
RCSK-16885-2 PRIMARY Am General Llc (USA)
110-8-6 PRIMARY Mazzer Industries Inc. (USA)
Related Parts
2910-00-104-8814INTERCHANGEABLE
PLUNGER,ROTOR
11086
5360-00-229-2814INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
11086
4730-00-263-2733INTERCHANGEABLE
TEE,PIPE
SAE J530 2-2-2 130424B
2915-00-413-4723INTERCHANGEABLE
THERMAL ELEMENT
11-086
6625-00-578-5340INTERCHANGEABLE
AMMETER
1728750
9540-00-612-6243INTERCHANGEABLE
BEAM,STRUCTURAL
6350-00-799-9243INTERCHANGEABLE
DIAPHRAM
11086
5999-01-003-2899INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
5905-01-050-0377INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
110-86
5950-01-056-2227INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
11086
4730-01-442-3491INTERCHANGEABLE
REDUCER,TUBE
110-6-4RMW
6240-01-474-5446INTERCHANGEABLE
LAMP,FLUORESCENT
11086

Frequently Asked Questions

What is NSN 4730-01-399-5546?

NSN 4730-01-399-5546 is a Reducer,tube, manufactured by Am General Llc, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-399-5546?

NSN 4730-01-399-5546 has 5 cross-referenced part numbers: RCSK 16885-2 (U S Army Tank Automotive Command Amsta-Im-Mm), 12448737 (U S Army Tank Automotive Command Amsta-Im-Mm), RCSK 16885 (U S Army Tank Automotive Command Amsta-Im-Mm), RCSK-16885-2 (Am General Llc), 110-8-6 (Mazzer Industries Inc.).

What NSN replaces 4730-01-399-5546?

There are 12 known substitutes for 4730-01-399-5546: 2910-00-104-8814, 5360-00-229-2814, 4730-00-263-2733 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of RCSK-16885-2?

Key specifications for RCSK-16885-2: Connection Style: PLAIN (TUBE) FIRST END; Material Document and Classification: MIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE GASKET; Material: RUBBER SYNTHETIC GASKET; Connection Style: GROOVED (TUBE) SECOND END. 8 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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