PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 999/4/42556/451
999/4/42556/451 ✓ 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 999/4/42556/451 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-399-8782, 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
999/4/42556/451
NSN: 5120-01-399-8782
FSC: 5120
CAGE: K1423 — BRITISH AEROSPACE LAND & SEA SYSTEMS, POST DESIGN SERVICES (GBR)
SPECIFICATIONS
Part Number999/4/42556/451
NSN5120-01-399-8782
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available 999/4/42556/451 TITLE COMPONENT PN 999/4/42556/451 MFR 999/4/42556/451
KEY FEATURES
•
MATERIAL: STEEL OVERALL
•
LARGE END HEAD ANGLE: 15.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: DOUBLE HEAD
•
SPECIFICATION/STANDARD DATA: 05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SMALL END HEAD ANGLE: 15.0 DEGREES NOMINAL
•
WRENCHING SURFACE SHAPE: OVAL BOTH ENDS INTERNAL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH200.0 MILLIMETERS MINIMUM MM
MATERIALSTEEL OVERALL
LARGE END HEAD ANGLE15.0 DEGREES NOMINAL
STYLE DESIGNATORDOUBLE HEAD
SPECIFICATION/STANDARD DATA05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SPECIAL FEATURESSATIN FINISH
SMALL END HEAD ANGLE15.0 DEGREES NOMINAL
WRENCHING SURFACE SHAPEOVAL BOTH ENDS INTERNAL
SURFACE TREATMENTCHROMIUM OVERALL
WRENCHING SURFACE SIZE20.0 MILLIMETERS NOMINAL FIRST END MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
137195Interchangeable
interchangeable cross-reference
interchangeable
357A7Interchangeable
interchangeable cross-reference
interchangeable
224285Interchangeable
interchangeable cross-reference
interchangeable
20-225Interchangeable
interchangeable cross-reference
interchangeable
32022Interchangeable
interchangeable cross-reference
interchangeable
32368Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 999/4/42556/451?
999/4/42556/451 is a 999/4/42556/451.
What parts can replace 999/4/42556/451?
There are 19 known substitutes for 999/4/42556/451: 137195, 357A7, 224285 and 16 more. Substitute compatibility should be verified for your specific system.
Is 999/4/42556/451 still available?
999/4/42556/451 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