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PartsTable / COMPONENT / STP 5278A
STP 5278A ✓ 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 SOCKET,SOCKET WRENCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_length: 2.156 INCHES NOMINAL IN, drive_end_shape: SQUARE SINGLE END INTERNAL, style_designator: UNIVERSAL JOINT, features_provided: MANUAL TOOL, surface_treatment: CHROMIUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-399-9746, 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
STP 5278A
NSN: 5120-01-399-9746
FSC: 5120
CAGE: 00NS2 — KIPPER TOOL COMPANY DBA KIPPER MANAGEMENT INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length2.156 INCHES NOMINAL IN
drive_end_shapeSQUARE SINGLE END INTERNAL
style_designatorUNIVERSAL JOINT
features_providedMANUAL TOOL
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.375 INCHES NOMINAL SINGLE END IN
wrenching_surface_size0.688 INCHES NOMINAL SINGLE END IN
wrenching_surface_shape12 POINT SINGLE END INTERNAL
NSN5120-01-399-9746
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SOCKET,SOCKET WRENCH TITLE COMPONENT PN STP 5278A MFR SOCKET,SOCKET WRENCH
KEY FEATURES
•
SURFACE TREATMENT: CHROMIUM OVERALL
•
WRENCHING SURFACE SIZE: 0.688 INCHES NOMINAL SINGLE END IN
•
FEATURES PROVIDED: MANUAL TOOL
•
DRIVE END SHAPE: SQUARE SINGLE END INTERNAL
•
WRENCHING SURFACE SHAPE: 12 POINT SINGLE END INTERNAL
•
MATERIAL: STEEL OVERALL
•
DRIVE SURFACE SIZE: 0.375 INCHES NOMINAL SINGLE END IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH2.156 INCHES NOMINAL IN
SURFACE TREATMENTCHROMIUM OVERALL
WRENCHING SURFACE SIZE0.688 INCHES NOMINAL SINGLE END IN
FEATURES PROVIDEDMANUAL TOOL
DRIVE END SHAPESQUARE SINGLE END INTERNAL
WRENCHING SURFACE SHAPE12 POINT SINGLE END INTERNAL
MATERIALSTEEL OVERALL
DRIVE SURFACE SIZE0.375 INCHES NOMINAL SINGLE END IN
STYLE DESIGNATORUNIVERSAL JOINT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
BB4256Interchangeable
interchangeable cross-reference
interchangeable
9W0572Interchangeable
interchangeable cross-reference
interchangeable
5278Interchangeable
interchangeable cross-reference
interchangeable
9177272Interchangeable
interchangeable cross-reference
interchangeable
7762895P7Interchangeable
interchangeable cross-reference
interchangeable
138957H1CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is STP 5278A?
STP 5278A is a SOCKET,SOCKET WRENCH.
What parts can replace STP 5278A?
There are 16 known substitutes for STP 5278A: BB4256, 9W0572, 5278 and 13 more. Substitute compatibility should be verified for your specific system.
Is STP 5278A still available?
STP 5278A 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