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Technical Data Sheet
PartsTable / COMPONENT / 30155-2-6
30155-2-6 ✓ 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,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OVERALL, head_style: BUTTON, head_height: 0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN, spline_width: 0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.154 INCHES MINIMUM AND 0.164 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 5305-00-224-1145, 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
30155-2-6
NSN: 5305-00-224-1145
FSC: 5305
CAGE: 50027 — UNDERSEA SENSOR SYSTEMS INC DIV ULTRA SONOBUOY SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OVERALL
head_styleBUTTON
head_height0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
spline_width0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN
thread_length0.323 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
fastener_length0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
internal_drive_styleSIX SPLINE
spline_major_diameter0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
NSN5305-00-224-1145
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 30155-2-6 · 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 DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL COMP 4037 OVERALL
•
THREAD LENGTH: 0.323 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
•
HEAD DIAMETER: 0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN
•
SPLINE MINOR DIAMETER: 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 4037 OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
THREAD LENGTH0.323 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
HEAD DIAMETER0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN
SPLINE MINOR DIAMETER0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
HEAD HEIGHT0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
HEAD STYLEBUTTON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
2566Interchangeable
interchangeable cross-reference
interchangeable
BACG10AH401Interchangeable
interchangeable cross-reference
interchangeable
A2566Interchangeable
interchangeable cross-reference
interchangeable
114068Interchangeable
interchangeable cross-reference
interchangeable
MS35489-106Interchangeable
interchangeable cross-reference
interchangeable
A217655P11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 30155-2-6?
30155-2-6 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 30155-2-6?
There are 10 known substitutes for 30155-2-6: 2566, BACG10AH401, A2566 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 30155-2-6?
30155-2-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-224-1145. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026