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PartsTable / COMPONENT / 11579774
11579774 ✓ 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 OVERALL, head_style: FLAT CHAMFER, head_height: 0.400 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.562 INCHES NOMINAL IN, thread_length: 1.125 INCHES MINIMUM AND 1.250 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 5305-01-226-6740, 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
11579774
NSN: 5305-01-226-6740
FSC: 5305
CAGE: 19206 — ARMY, UNITED STATES DEPARTMENT OF THE DBA WATERVLIET ARSENAL DIV BUSINESS DEVELOPMENT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.400 INCHES NOMINAL IN
thread_class3A A
head_diameter0.562 INCHES NOMINAL IN
thread_length1.125 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
fastener_length1.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE ZINC OVERALL
width_across_flats0.312 INCHES NOMINAL IN
internal_drive_styleHEXAGON
end_item_identificationHOWITZER;HOWITZER, MEDIUM, TOWED, 155MM MM
NSN5305-01-226-6740
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11579774 · 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
•
FASTENER LENGTH: 1.250 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.312 INCHES NOMINAL IN
•
INTERNAL DRIVE STYLE: HEXAGON
•
SURFACE TREATMENT: PHOSPHATE ZINC OVERALL
•
MATERIAL: STEEL OVERALL
•
HEAD HEIGHT: 0.400 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH1.250 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.312 INCHES NOMINAL IN
END ITEM IDENTIFICATIONHOWITZER;HOWITZER, MEDIUM, TOWED, 155MM MM
INTERNAL DRIVE STYLEHEXAGON
SURFACE TREATMENTPHOSPHATE ZINC OVERALL
MATERIALSTEEL OVERALL
HEAD HEIGHT0.400 INCHES NOMINAL IN
THREAD CLASS3A A
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEFLAT CHAMFER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
6204-3155974ALT4PC18Interchangeable
interchangeable cross-reference
interchangeable
MF44773DPC18Interchangeable
interchangeable cross-reference
interchangeable
MF44775EPC13-14Interchangeable
interchangeable cross-reference
interchangeable
GB705Interchangeable
interchangeable cross-reference
interchangeable
1561-1Interchangeable
interchangeable cross-reference
interchangeable
40568Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11579774?
11579774 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 11579774?
There are 20 known substitutes for 11579774: 6204-3155974ALT4PC18, MF44773DPC18, MF44775EPC13-14 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11579774?
11579774 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-226-6740. 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