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494927 — BOLT,RIBBED SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

494927: BOLT,RIBBED SHOULDER.

The BOLT,RIBBED SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, head_style: FLAT EXTENDED WASHER, rib_length: 0.340 INCHES NOMINAL IN, head_height: 0.115 INCHES NOMINAL IN, rib_quantity: 35, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-022-8085, 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
494927
NSN: 5306-00-022-8085
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
head_styleFLAT EXTENDED WASHER
rib_length0.340 INCHES NOMINAL IN
head_height0.115 INCHES NOMINAL IN
rib_quantity35
thread_class3A A
head_diameter0.880 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
thread_length0.490 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
shoulder_shapeRIBBED SECOND SHOULDER
fastener_length1.640 INCHES MINIMUM AND 1.660 INCHES MAXIMUM IN
hardness_rating35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length0.340 INCHES NOMINAL SECOND SHOULDER IN
NSN5306-00-022-8085
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 494927 · 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
•
EXTENDED WASHER THICKNESS: 0.010 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.115 INCHES NOMINAL IN
•
RIB INCLUDED ANGLE: 45.0 DEGREES NOMINAL
•
FASTENER LENGTH: 1.640 INCHES MINIMUM AND 1.660 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.060 INCHES NOMINAL FIRST SHOULDER IN
•
EXTENDED WASHER DIAMETER: 0.450 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.010 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN
HEAD HEIGHT0.115 INCHES NOMINAL IN
RIB INCLUDED ANGLE45.0 DEGREES NOMINAL
FASTENER LENGTH1.640 INCHES MINIMUM AND 1.660 INCHES MAXIMUM IN
SHOULDER LENGTH0.060 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER LENGTH0.340 INCHES NOMINAL SECOND SHOULDER IN
EXTENDED WASHER DIAMETER0.450 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
SHOULDER DIAMETER0.279 INCHES MINIMUM AND 0.281 INCHES MAXIMUM SECOND SHOULDER IN
SHOULDER DIAMETER0.285 INCHES MINIMUM AND 0.295 INCHES MAXIMUM FIRST SHOULDER IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 494927?
494927 is a BOLT,RIBBED SHOULDER.
What is the NSN for 494927?
494927 is cataloged in the U.S. Government catalog under NSN 5306-00-022-8085. 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.