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175578 ✓ 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,TAPPING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OR STEEL COMP 420 OVERALL, head_style: ROUND, head_height: 0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, head_diameter: 0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM IN, fastener_length: 0.375 INCHES NOMINAL IN, surface_treatment: PASSIVATE 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 5305-00-017-5578, 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
175578
NSN: 5305-00-017-5578
FSC: 5305
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OR STEEL COMP 420 OVERALL
head_styleROUND
head_height0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
head_diameter0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM IN
fastener_length0.375 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
internal_drive_styleSLOT
nonmachine_thread_styleTHRU SLOT (TYPE D)
nondefinitive_spec/std_dataCS TYPE AND 1A STYLE A
nonmachine_nominal_thread_diameter0.164 INCHES IN
material_document_and_classificationQQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5305-00-017-5578
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 175578 · 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: 0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
NONMACHINE THREAD STYLE: THRU SLOT (TYPE D)
•
MATERIAL: STEEL COMP 410 OR STEEL COMP 420 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NONDEFINITIVE SPEC/STD DATA: CS TYPE AND 1A STYLE A
•
HEAD STYLE: ROUND
•
INTERNAL DRIVE STYLE: SLOT
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
NONMACHINE THREAD STYLETHRU SLOT (TYPE D)
MATERIALSTEEL COMP 410 OR STEEL COMP 420 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
NONDEFINITIVE SPEC/STD DATACS TYPE AND 1A STYLE A
HEAD STYLEROUND
INTERNAL DRIVE STYLESLOT
NONMACHINE NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD DIAMETER0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
FFS107TYPECSSTYLE1SInterchangeable
interchangeable cross-reference
interchangeable
66843Interchangeable
interchangeable cross-reference
interchangeable
171354Interchangeable
interchangeable cross-reference
interchangeable
S3523ACInterchangeable
interchangeable cross-reference
interchangeable
171356Interchangeable
interchangeable cross-reference
interchangeable
171575Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 175578?
175578 is a SCREW,TAPPING.
What parts can replace 175578?
There are 8 known substitutes for 175578: FFS107TYPECSSTYLE1S, 66843, 171354 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 175578?
175578 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-017-5578. 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