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PartsTable / COMPONENT / HK 251
HK 251 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The HK 251 is a the manufacturer industrial component. Key specifications include width: 2.500 INCHES NOMINAL IN, length: 2.500 INCHES NOMINAL IN, material: IRON CAST, shank_style: STRAIGHT, shank_length: 1.000 INCHES NOMINAL IN, shank_diameter: 1.125 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5355-01-462-8440, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
HK 251
NSN: 5355-01-462-8440
FSC: 5355
CAGE: 06197 — MONROE ENGINEERING LLC DBA MONROE PMP (USA)
SPECIFICATIONS
width2.500 INCHES NOMINAL IN
length2.500 INCHES NOMINAL IN
materialIRON CAST
shank_styleSTRAIGHT
shank_length1.000 INCHES NOMINAL IN
shank_diameter1.125 INCHES NOMINAL IN
inside_diameter2.500 INCHES NOMINAL IN
style_designatorCROSS
attachment_methodSCREW ON
overall_thickness0.500 INCHES NOMINAL IN
nominal_thread_size0.500 INCHES RECEPTACLE IN
material_transparencyOPAQUE
NSN5355-01-462-8440
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HK 251 TITLE COMPONENT PN HK 251 MFR HK 251
KEY FEATURES
•
INSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
SHANK LENGTH: 1.000 INCHES NOMINAL IN
•
SHANK STYLE: STRAIGHT
•
MATERIAL: IRON CAST
•
STYLE DESIGNATOR: CROSS
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) SCREW HOLE
•
THREAD QUANTITY PER INCH: 13 RECEPTACLE
•
NOMINAL THREAD SIZE: 0.500 INCHES RECEPTACLE IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER2.500 INCHES NOMINAL IN
SHANK LENGTH1.000 INCHES NOMINAL IN
SHANK STYLESTRAIGHT
MATERIALIRON CAST
STYLE DESIGNATORCROSS
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SCREW HOLE
THREAD QUANTITY PER INCH13 RECEPTACLE
NOMINAL THREAD SIZE0.500 INCHES RECEPTACLE IN
ATTACHMENT METHODSCREW ON
SHANK DIAMETER1.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
FFS107TABLEIITYPEBSTYLE9SSIZE8Interchangeable
interchangeable cross-reference
interchangeable
10351Interchangeable
interchangeable cross-reference
interchangeable
416LXInterchangeable
interchangeable cross-reference
interchangeable
SC-C-39992-25Interchangeable
interchangeable cross-reference
interchangeable
50046Interchangeable
interchangeable cross-reference
interchangeable
9577PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HK 251?
HK 251 is a HK 251.
What parts can replace HK 251?
There are 16 known substitutes for HK 251: FFS107TABLEIITYPEBSTYLE9SSIZE8, 10351, 416LX and 13 more. Substitute compatibility should be verified for your specific system.
Is HK 251 still available?
HK 251 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026