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Technical Data Sheet
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71256-4 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: ROUND, head_height: 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.146 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN, thread_length: 0.125 INCHES NOMINAL IN, screw_material: COPPER ALLOY. This part is cataloged in the Federal Logistics Information System under NSN 5305-00-206-6012, 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
71256-4
NSN: 5305-00-206-6012
FSC: 5305
CAGE: 88869 — EATON CORP ELECTRONIC INSTRUMENTATION DIV LOS ANGELES PLANT (USA)
SPECIFICATIONS
head_styleROUND
head_height0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.146 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN
thread_length0.125 INCHES NOMINAL IN
screw_materialCOPPER ALLOY
fastener_length0.125 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.086 INCHES IN
screw_surface_treatmentNICKEL
thread_quantity_per_inch56
NSN5305-00-206-6012
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 71256-4 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL THREAD DIAMETER: 0.086 INCHES IN
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 56
•
FASTENER LENGTH: 0.125 INCHES NOMINAL IN
•
THREAD LENGTH: 0.125 INCHES NOMINAL IN
•
SCREW MATERIAL: COPPER ALLOY
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD DIAMETER: 0.146 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
NOMINAL THREAD DIAMETER0.086 INCHES IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH56
FASTENER LENGTH0.125 INCHES NOMINAL IN
THREAD LENGTH0.125 INCHES NOMINAL IN
SCREW MATERIALCOPPER ALLOY
THREAD DIRECTIONRIGHT-HAND
HEAD DIAMETER0.146 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN
HEAD STYLEROUND
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
101099InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SCD2X5F681KKInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2643-D-48InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PM2130InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
HN949B04-256InterchangeableGOVERNMENT REGISTRY
Screw,machine
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 71256-4?
71256-4 is a SCREW,MACHINE.
What parts can replace 71256-4?
There are 5 known substitutes for 71256-4: 101099, SCD2X5F681KK, 2643-D-48 and 2 more. Substitute compatibility should be verified for your specific system.
Is 71256-4 still available?
71256-4 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: October 2026