Tube Coupling Nut P/N AN818-3J

Specifications

Thread quantity per inch

24

Nominal thread size

Inches 0.375

Material document and classification

Overall Fed Spec Single Material Response QQ-S-763

Surface treatment

Overall Passivate

Nut height

0.604 in (nominal)

Length to shoulder

0.506 in (nominal)

Thread direction

Right-Hand

Nominal tube outside diameter

Inches 0.188

Material

Overall Steel Comp 304

Smallest inside diameter

0.242 in (nominal)

Specification/standard data

Government Standard 88044-AN818

Thread class

3B

Thread series

Unified National Joint Fine (Unjf)

Width across flats

0.438 in (nominal)

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

Cross-reference part numbers

AN818-3J MILF5509 AS4841 SAE-AS4841

Also referenced as

AN818-3C 525-629-90102

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual. They find the item; confirm the current part number when you order.

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

Logistics data

Source of supply	SMS DLA Land and Maritime, Columbus, Ohio
Acquisition advice code	Z Insurance/numeric stockage objective — held by the government as insurance stock for contingencies, not for routine issue. SECO has 25 on the shelf
Unit of issue	EA each
Demilitarization code	A Demilitarization not required — non-munitions-list item
Controlled inventory code	U Unclassified
Hazardous material indicator	N No hazardous material

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 4730-00-540-0488?
NSN 4730-00-540-0488 (4730005400488) — Tube Coupling Nut: SECO Parts has 25 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for tube coupling nut in federal supply class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings).

Is NSN 4730-00-540-0488 available?
SECO Parts has 25 in stock in Augusta, GA — order or request a quote below.

How much does NSN 4730-00-540-0488 cost?
NSN 4730-00-540-0488 is a low-cost part, so SECO quotes it by the line rather than by the piece: there is a $50 minimum per line, and quantity pricing on request — usually answered the same business day.

What part numbers cross-reference to NSN 4730-00-540-0488?
Part numbers that cross-reference this NSN include AN818-3J, MILF5509, AS4841, SAE-AS4841. It is also referenced by older, superseded or advisory numbers: AN818-3C, 525-629-90102. SECO can quote against any of them.