Straight Pipe to Tube Adapter P/N MS51819-20

Specifications

Thread class

2A

Maximum operating temp

First Response Celsius -54.0

Nominal thread size

Second End Inches 1.250

Connection type

Second End Threaded External Pipe

Thread quantity per inch

12

Nominal thread size

First End Inches 1.625

Maximum operating temp

Second Response Celsius 121.0

Media for which designed

Single Response Hydraulic Fluid

Surface treatment document and classification

Overall Assn STD Single Treatment Response J514 and Fed Spec Single Treatment Response QQ--416, TY 2, CL 3

Thread series designator

First End UN

Thread series designator

Second End NPTF

Operating pressure

Single Response Pounds Per Square Inch (PSI) Maximum 3000.0

Seat angle

First End Degrees 12.0

Connection type

First End Threaded External Tube

Nominal overall length

Inches 2.180

Furnished items and quantity

Ferrule Sleeve 1 and Short Coupling Nut 1

Material

Overall Steel

Specification/standard data

Government Standard 96906--S51819 and Professional/industrial Association Standard 81343-J514

Nondefinitive spec/std data

Figure 19A

Material document and classification

Overall Fed Spec Single Material Response QQ-S-624 or Fed Spec Single Material Response QQ-S-631 or Fed Spec Single Material Response QQ-S-637

Nominal outside diameter tube accommodated

First End Inches 1.250

From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.

Cross-reference part numbers

MS51819-20 20FBU-S 8205X20 A8205X20 0-20 080102CA J514 MIL-F-18866 914148 0914148 0914148-2 MS51819-20B

Shown for identification only. SECO can quote against any of these numbers.

Logistics data

Source: public FLIS/PUB LOG cataloging data.

Why buy from SECO

These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.

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FAQ

What is NSN 4730-00-139-3841?
NSN 4730-00-139-3841 (4730001393841) — Straight Pipe to Tube Adapter: SECO Parts has 225 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for straight pipe to tube adapter in federal supply class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings).

Is NSN 4730-00-139-3841 available?
SECO Parts has 225 in stock in Augusta, GA — order or request a quote below.

How much does NSN 4730-00-139-3841 cost?
SECO typically prices parts like NSN 4730-00-139-3841 at $50–$95 each: an estimate from the government catalog price and what SECO has charged for similar parts. It is not a quote — request one for your price, usually answered the same business day. Quote lines carry a $50 minimum.

What part numbers cross-reference to NSN 4730-00-139-3841?
Part numbers that cross-reference this NSN include MS51819-20, 20FBU-S, 8205X20, A8205X20, 0-20 080102CA, J514, MIL-F-18866, 914148. SECO can quote against any of them.