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Technical Data Sheet
PartsTable / COMPONENT / 51231
51231 ✓ Verified by PartsTable
Legrand · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

This card is finished to a high standard to allow for easy and safe installation, and it is backed by the LINDY full technical support service. The finger contacts are gold-plated to limit oxidisation and extend the life of the card.<br>- Bus Type: 32 Bit PCI<br>- Speed: 10/100Mbit/sec<br>- Standard: IEEE 802.3 (10Base-T) & 802.3u (100Base-TX)<br>- I/O Address: "Plug & Play"<br>- IRQ Selection: "Plug & Play"<br>- Card Connector: RJ-45 UTP (10/100Base-TX)<br>- Chipset: Realtek 8139D<br>- Software Compatibility: Windows 98SE/ME/2000/XP/Vista/Windows 7, NetWare 3.x/4.x/5.x, Linux. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-423-0043, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
51231
NSN: 4720-00-423-0043
FSC: 4720
CAGE: 07443 — LANDOLL CORPORATION DBA LANDOLL CORPORATION DREXEL DIVISION DIV DREXEL (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
base_width2.281 INCHES NOMINAL IN
base_length4.438 INCHES NOMINAL IN
gaging_range+0.000 TO 18.000 INCHES IN
indicator_typeVERNIER
special_featuresSATIN CHROME FINISH
features_providedFINE ADJUSTMENT
vernier_scale_locationFRONT
minimum_vernier_graduation_unit0.001 INCHES IN
accessory_components_and_quantitySCRIBER AND CASE
NSN4720-00-423-0043
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 51231 · Legrand ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
INSIDE SURFACE CONDITION: SMOOTH
•
SEAT ANGLE: 45.0 DEGREES FIRST END
•
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST END
•
END CONNECTION DESIGN: STRAIGHT FIRST END
•
OPERATING PRESSURE: 2250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
•
THREAD SERIES DESIGNATOR: UNF FIRST END
•
THREAD CLASS: 2B FIRST END
•
OUTER COVERING ENVIRONMENTAL PROTECTION: OIL RESISTANT AND OZONE RESISTANT
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE SURFACE CONDITIONSMOOTH
SEAT ANGLE45.0 DEGREES FIRST END
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
END CONNECTION DESIGNSTRAIGHT FIRST END
OPERATING PRESSURE2250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
THREAD SERIES DESIGNATORUNF FIRST END
THREAD CLASS2B FIRST END
OUTER COVERING ENVIRONMENTAL PROTECTIONOIL RESISTANT AND OZONE RESISTANT
HYDROSTATIC TEST PRESSURE4500.0 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
KC162-7DInterchangeable
interchangeable cross-reference
interchangeable
51231Interchangeable
interchangeable cross-reference
interchangeable
KC162-2DInterchangeable
interchangeable cross-reference
interchangeable
6842Interchangeable
interchangeable cross-reference
interchangeable
A51231Interchangeable
interchangeable cross-reference
interchangeable
5123190Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51231?
51231 is a STOP,MECHANICAL manufactured by Legrand.
What parts can replace 51231?
There are 8 known substitutes for 51231: KC162-7D, 51231, KC162-2D and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51231?
51231 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-423-0043. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026