PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 03-006442
03-006442 ✓ 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,RIBBED NECK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, head_style: FLAT CHAMFER, rib_length: 0.921 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN, head_height: 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.750 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-966-9553, 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
03-006442
NSN: 5306-00-966-9553
FSC: 5306
CAGE: 52793 — SAGINAW PRODUCTS CORPORATION DBA CIGNYS (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
head_styleFLAT CHAMFER
rib_length0.921 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN
head_height0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.750 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN
thread_length1.109 INCHES MINIMUM AND 1.141 INCHES MAXIMUM IN
fastener_length2.234 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
rib_major_diameter0.534 INCHES MINIMUM AND 0.539 INCHES MAXIMUM IN
NSN5306-00-966-9553
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 03-006442 · 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
•
HEAD HEIGHT: 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.234 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN
•
HEAD STYLE: FLAT CHAMFER
•
MATERIAL: STEEL COMP 4140 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE2,CLASS3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD SERIES DESIGNATOR: UNF
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
•
THREAD QUANTITY PER INCH: 20
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
FASTENER LENGTH2.234 INCHES MINIMUM AND 2.266 INCHES MAXIMUM IN
HEAD STYLEFLAT CHAMFER
MATERIALSTEEL COMP 4140 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE2,CLASS3 FED SPEC ALL TREATMENT RESPONSES OVERALL
THREAD SERIES DESIGNATORUNF
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
THREAD QUANTITY PER INCH20
NOMINAL THREAD DIAMETER0.500 INCHES IN
RIB LENGTH0.921 INCHES MINIMUM AND 0.953 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
6442Interchangeable
interchangeable cross-reference
interchangeable
DOD-018Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-1/1727Interchangeable
interchangeable cross-reference
interchangeable
N1828Interchangeable
interchangeable cross-reference
interchangeable
6928JGCInterchangeable
interchangeable cross-reference
interchangeable
239161-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 03-006442?
03-006442 is a BOLT,RIBBED NECK.
What parts can replace 03-006442?
There are 14 known substitutes for 03-006442: 6442, DOD-018, MIL-PRF-1/1727 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 03-006442?
03-006442 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-966-9553. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026