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Technical Data Sheet
PartsTable / COMPONENT / 756-7121-004
756-7121-004 ✓ 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: PAN, head_height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, thread_length: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-638-8028, 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
756-7121-004
NSN: 5305-00-638-8028
FSC: 5305
CAGE: 95105 — ROCKWELL COLLINS, INC. DIV COLLINS AEROSPACE - MISSION SYSTEMS (USA)
SPECIFICATIONS
head_stylePAN
head_height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_length0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
screw_materialSTEEL
fastener_length0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentPASSIVATE
thread_quantity_per_inch32
NSN5305-00-638-8028
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 756-7121-004 · 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 SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
FASTENER LENGTH: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD QUANTITY PER INCH: 32
•
THREAD LENGTH: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
HEAD STYLE: PAN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
FASTENER LENGTH0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD QUANTITY PER INCH32
THREAD LENGTH0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
HEAD STYLEPAN
THREAD DIRECTIONRIGHT-HAND
HEAD DIAMETER0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
SCREW MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
2002955Interchangeable
interchangeable cross-reference
interchangeable
10-91243-4Interchangeable
interchangeable cross-reference
interchangeable
F54Interchangeable
interchangeable cross-reference
interchangeable
FFS92TYPE3STYLE9CInterchangeable
Same NIIN cross-reference
interchangeable
MS35216-28Interchangeable
Same NIIN cross-reference
interchangeable
343-0173-000Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 756-7121-004?
756-7121-004 is a SCREW,MACHINE.
What parts can replace 756-7121-004?
There are 6 known substitutes for 756-7121-004: 2002955, 10-91243-4, F54 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 756-7121-004?
756-7121-004 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-638-8028. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026