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PartsTable / COMPONENT / H7493901-8
H7493901-8 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include screw_material: STEEL, special_features: COLD FINISHED, supplementary_features: NEXT HIGHER ASSEMBLY: MAIN CONDENSER OVERPRESSURE TRIP MECHANISM, end_item_identification: NSSN CLASS SUBMARINE, nominal_thread_diameter: 0.750 INCHES IN, part_name_assigned_by_controlling_agency: RETAINER SCREW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-476-6406, 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
H7493901-8
NSN: 5305-01-476-6406
FSC: 5305
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
screw_materialSTEEL
special_featuresCOLD FINISHED
supplementary_featuresNEXT HIGHER ASSEMBLY: MAIN CONDENSER OVERPRESSURE TRIP MECHANISM
end_item_identificationNSSN CLASS SUBMARINE
nominal_thread_diameter0.750 INCHES IN
part_name_assigned_by_controlling_agencyRETAINER SCREW
NSN5305-01-476-6406
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: H7493901-8 · 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
•
SUPPLEMENTARY FEATURES: NEXT HIGHER ASSEMBLY: MAIN CONDENSER OVERPRESSURE TRIP MECHANISM
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
SUPPLEMENTARY FEATURESNEXT HIGHER ASSEMBLY: MAIN CONDENSER OVERPRESSURE TRIP MECHANISM
SPECIAL FEATURESCOLD FINISHED
NOMINAL THREAD DIAMETER0.750 INCHES IN
END ITEM IDENTIFICATIONNSSN CLASS SUBMARINE
PART NAME ASSIGNED BY CONTROLLING AGENCYRETAINER SCREW
SCREW MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
254-7015355Interchangeable
interchangeable cross-reference
interchangeable
36-01-7808Interchangeable
interchangeable cross-reference
interchangeable
254-7015355PN77Interchangeable
interchangeable cross-reference
interchangeable
H7493901-9Interchangeable
interchangeable cross-reference
interchangeable
H749-3901Interchangeable
interchangeable cross-reference
interchangeable
245-7015355Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H7493901-8?
H7493901-8 is a SCREW,MACHINE.
What parts can replace H7493901-8?
There are 17 known substitutes for H7493901-8: 254-7015355, 36-01-7808, 254-7015355PN77 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H7493901-8?
H7493901-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-476-6406. 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