Boss Elbow P/N AS5190-04

Specifications

Part name assigned by controlling agency

Fitting,Elbow 90(Degrees),Internal Straight Thread Port

Nominal width

First End Inches 0.744

Nominal thread size

First End Inches 0.4375

Surface treatment

Overall Cadmium

Special test features

Material: 4130 Carbon Steel Forging or Bar Per AMS-S-6758 or Ams 6370,or Type 4140 Per Ams 6382, Finish:Cadmium Plate Per QQ-P-416,Type II, Class 2, Dye Black and Coat with a Light Film of Oil Per Procurement Specification

Material

Overall Steel Comp 4130

Specification/standard data

Government Standard 88044-AN939

Nominal inside diameter hose accommodated

First End Inches 0.250

Thread class

3B

Thread series designator

All Ends Unified National Joint Fine (Unjf)

Operating pressure

Single Response Pounds Per Square Inch (PSI) Maximum 3000.00

Flow angle

Degrees 90.0

Material document and classification

Overall Fed STD Single Material Response 66

Connection type

All Ends Threaded Internal Boss

Leg length

First End Inches Nominal 0.750

Thread quantity per inch

20

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

Cross-reference part numbers

AS5190-04 AN939-4 AS4875 AS5190 8169041

Also referenced as

AN934-4

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual.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 1 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 4730-00-277-1921?
NSN 4730-00-277-1921 (4730002771921) — Boss Elbow: SECO Parts has 1 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for boss elbow in federal supply class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings).

Is NSN 4730-00-277-1921 available?
SECO Parts has 1 in stock in Augusta, GA — order or request a quote below.

How much does NSN 4730-00-277-1921 cost?
SECO typically prices parts like NSN 4730-00-277-1921 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 does NSN 4730-00-277-1921 fit?
The federal catalog lists NSN 4730-00-277-1921 as used on: Grumman A10 Aircraft.

What part numbers cross-reference to NSN 4730-00-277-1921?
Part numbers that cross-reference this NSN include AS5190-04, AN939-4, AS4875, AS5190, 8169041. It is also referenced by older, superseded or advisory numbers: AN934-4. SECO can quote against any of them.