Home · NSN 01-290-4971

NSN 01-290-4971 — Flange,Pipe

NIIN 01-290-4971 · unit of issue EA · AAC J (not stocked, central procurement) · source of supply SMS

NSN 01-290-4971 is the national stock number for a flange,pipe. It cross-references to 7 manufacturer part numbers from 5 CAGE codes, including The American Society Of Mechanical Engineers, Crane Co Midwest Fittings Div, Ati Ladish LLC; the primary is 21539. The unit of issue is EA and the FLIS list price is $1,388.54.

No government purchase of this stock number is on our record yet. No seller has confirmed stock of it here in the last 30 days; watching the number is free and the first listing triggers an alert.

7

part numbers from 5 CAGEs

0

open solicitations, all agencies

0

government buys in 24 months

0

sellers with confirmed stock

Watch NSN 01-290-4971: an email the morning the government solicits or buys it, or an AD names it. Free.
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Cross-references

Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.

Part numberCAGEManufacturerReferenceVariation
AMSE B16.505047The American Society Of Mechanical Engineers3 · Design control (vendor)1 · Not fully interchangeable
2153940475Crane Co Midwest Fittings Div5 · Secondary reference9 · Reference only
60 4 IN.IPS34646Ati Ladish LLC5 · Secondary reference1 · Not fully interchangeable
ANSI B16.5 4IN.IPS.80204American National Standards Institute Incorporated5 · Secondary reference9 · Reference only
B16.5 4IN.IPS05047The American Society Of Mechanical Engineers5 · Secondary reference2 · Fully interchangeable
M18180/1061A0181349Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only
MIL-F-1818081349Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only

Government demand

Nothing open right now. Watch this NSN and we will email you when it is solicited.

What the government paid

No government purchase on record for this NSN.

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices.

Sellers with confirmed stock

No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on 21539.

Request 21539

No account needed. Goes to the sellers who carry this number or its family.

Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.

DLA management data

FLIS unit price
$1,388.54
Unit of issue
EA
Acquisition advice
J — Not stocked, central procurement
Source of supply
SMS
Effective
Oct 1, 2026

Item characteristics

Bolt Circle Diameter
INCHES NOMINAL 8.500
Flange Diameter
INCHES NOMINAL 10.750
Thickness
INCHES NOMINAL 1.500
Nominal Pipe Size For Which Designed
INCHES 4.000
Bolt Hole Quantity
8
Bolt Hole Diameter
INCHES NOMINAL 0.875
Raised Face Height
INCHES NOMINAL 0.250
Raised Face Diameter
INCHES NOMINAL 6.188
Neck Height
INCHES NOMINAL 2.500
Face Seating Surface Condition
MACHINED
Special Features
WATER BORE DIMENSIONS 1.610 IN.
Material
STEEL
Material Document And Classification
ASSN STD SINGLE MATERIAL RESPONSE AST- A105
Specification/Standard Data
PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD 80204-ANSI B16.5
Nondefinitive Spec/Std Data
TABLE 18

Related stock numbers

Other NSNs filed under the same part numbers.

About this page

An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.

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