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Technical Data Sheet
PartsTable / COMPONENT / 330-570
330-570 ✓ 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 TRANSFORMER,POWER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A A, thread_length: 0.750 INCHES NOMINAL IN, style_designator: ROUND BEND, thread_direction: RIGHT-HAND, surface_treatment: ZINC OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-889-3003, 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
330-570
NSN: 5306-00-889-3003
FSC: 5306
CAGE: 0FUR2 — LOWELL CORPORATION DBA PORTER FERGUSON DIV PORTER FERGUSON DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A A
thread_length0.750 INCHES NOMINAL IN
style_designatorROUND BEND
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
end_item_identificationRELAY AND TRANSMISSION EQUIP
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
thread_series_designatorUNF
inside_distance_between_shanks2.484 INCHES MINIMUM AND 2.516 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5306-00-889-3003
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 330-570 · 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
•
THREAD LENGTH: 0.750 INCHES MINIMUM IN
•
INSIDE DISTANCE BETWEEN SHANKS: 1.850 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL COMP 1008 OVERALL
•
STYLE DESIGNATOR: ROUND BEND
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.750 INCHES MINIMUM IN
INSIDE DISTANCE BETWEEN SHANKS1.850 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
SURFACE TREATMENTZINC OVERALL
MATERIALSTEEL COMP 1008 OVERALL
STYLE DESIGNATORROUND BEND
THREAD SERIES DESIGNATORUNF
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END3.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
330571Upgraded Successor
successor cross-reference
successor
330570Upgraded Successor
successor cross-reference
successor
SM-A-957460Interchangeable
interchangeable cross-reference
interchangeable
322-800054-000Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 330-570?
330-570 is a TRANSFORMER,POWER.
What parts can replace 330-570?
There are 4 known substitutes for 330-570: 330571, 330570, SM-A-957460 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 330-570?
330-570 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-889-3003. 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