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Technical Data Sheet
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SYSTEM II REF 39 — 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 BOLT,MACHINE is a the manufacturer industrial component. Key specifications include special_features: 0.625 IN. WIDTH BETWEEN FLATS IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.250 INCHES IN, thread_quantity_per_inch: 28.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System under NSN 5306-01-448-1752, 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
SYSTEM II REF 39
NSN: 5306-01-448-1752
FSC: 5306
CAGE: 8Z618 — THE JEROME GROUP INC DBA JEROME MEDICAL (USA)
SPECIFICATIONS
special_features0.625 IN. WIDTH BETWEEN FLATS IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
NSN5306-01-448-1752
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SYSTEM II REF 39 · 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 QUANTITY PER INCH: 28
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
SPECIAL FEATURES0.625 IN. WIDTH BETWEEN FLATS IN
THREAD QUANTITY PER INCH28
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.250 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
42AW49InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SC-C-599081InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
40A-9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
39-MInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
39-LInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
GS-550-390-LInterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SYSTEM II REF 39?
SYSTEM II REF 39 is a BOLT,MACHINE.
What parts can replace SYSTEM II REF 39?
There are 6 known substitutes for SYSTEM II REF 39: 42AW49, SC-C-599081, 40A-9 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SYSTEM II REF 39?
SYSTEM II REF 39 is cataloged in the Federal Logistics Information System under NSN 5306-01-448-1752. 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: October 2026