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B498824 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

B498824: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DEE CHAMFER, head_height: 0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, thread_length: 1.050 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-157-8362, 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
B498824
NSN: 5306-01-157-8362
FSC: 5306 — Bolts
CAGE: K0378 — ROLLS-ROYCE PLC DIV DEFENSE (EUROPE) (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDEE CHAMFER
head_height0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
thread_length1.050 INCHES NOMINAL IN
fastener_length3.110 INCHES NOMINAL IN
special_featuresBOTH DIA ROUNDED WITH RADIUS OF 0.250 IN. ON EACH END IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.437 INCHES IN
first_diameter_from_head0.355 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
thread_quantity_per_inch20
NSN5306-01-157-8362
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: B498824 · 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 0.200 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.110 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.280 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.050 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: DTD 5066,FSCM K0378 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.355 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.437 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
FASTENER LENGTH3.110 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO FLAT0.280 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
THREAD LENGTH1.050 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONDTD 5066,FSCM K0378 MFR REF SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.355 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.437 INCHES IN
HEAD STYLEDEE CHAMFER
THREAD DIRECTIONRIGHT-HAND
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B498824?
B498824 is a BOLT,EXTERNALLY RELIEVED BODY.
What is the NSN for B498824?
B498824 is cataloged in the U.S. Government catalog under NSN 5306-01-157-8362. 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.