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524326 — BOLT,RIBBED SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

524326: BOLT,RIBBED SHOULDER.

The BOLT,RIBBED SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, rib_length: 0.150 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, head_height: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN, rib_quantity: 36, thread_class: 3A A, head_diameter: 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-948-1356, 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
524326
NSN: 5306-00-948-1356
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
rib_length0.150 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
head_height0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
rib_quantity36
thread_class3A A
head_diameter0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
thread_length0.488 INCHES MINIMUM AND 0.548 INCHES MAXIMUM IN
fastener_length1.070 INCHES MINIMUM AND 1.090 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
rib_major_diameter0.317 INCHES NOMINAL IN
rib_minor_diameter0.289 INCHES NOMINAL IN
NSN5306-00-948-1356
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 524326 · 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: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.070 INCHES MINIMUM AND 1.090 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS: 0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.488 INCHES MINIMUM AND 0.548 INCHES MAXIMUM IN
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
RIB LENGTH: 0.150 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
FASTENER LENGTH1.070 INCHES MINIMUM AND 1.090 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO FLAT0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN
THREAD LENGTH0.488 INCHES MINIMUM AND 0.548 INCHES MAXIMUM IN
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
RIB LENGTH0.150 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
RIB MINOR DIAMETER0.289 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 524326?
524326 is a BOLT,RIBBED SHOULDER.
What is the NSN for 524326?
524326 is cataloged in the U.S. Government catalog under NSN 5306-00-948-1356. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.