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1677-10-678-7247 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1677-10-678-7247: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY AND COPPER ALLOY FASTENER, thread_class: UNRC, end_item_identification: HATCH ASSY, LPT UPPER, nominal_thread_diameter: 0.250 INCHES IN, thread_quantity_per_inch: 20, criticality_code_justification: FEAT. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-652-8572, 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
1677-10-678-7247
NSN: 5305-01-652-8572
FSC: 5305 — Screws
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY AND COPPER ALLOY FASTENER
thread_classUNRC
special_featuresITEM SHALL COMPLY WITH REQUIREMENTS OF NAVSEA SS800-AG-MAN-10/P-9290,SYSTEM CERTIFICATION PROCEDURE AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS.
end_item_identificationHATCH ASSY, LPT UPPER
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
criticality_code_justificationFEAT
material_document_and_classificationQQ-N-286 MIL STD SINGLE MATERIAL RESPONSE FASTENER
part_name_assigned_by_controlling_agencySCRE,SELF LOCKING,SCH
NSN5305-01-652-8572
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1677-10-678-7247 · 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
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286 MIL STD SINGLE MATERIAL RESPONSE FASTENER
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD CLASS: UNRC
•
THREAD QUANTITY PER INCH: 20
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONFEAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286 MIL STD SINGLE MATERIAL RESPONSE FASTENER
NOMINAL THREAD DIAMETER0.250 INCHES IN
SPECIAL FEATURESITEM SHALL COMPLY WITH REQUIREMENTS OF NAVSEA SS800-AG-MAN-10/P-9290,SYSTEM CERTIFICATION PROCEDURE AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS.
PART NAME ASSIGNED BY CONTROLLING AGENCYSCRE,SELF LOCKING,SCH
THREAD CLASSUNRC
END ITEM IDENTIFICATIONHATCH ASSY, LPT UPPER
THREAD QUANTITY PER INCH20
MATERIALNICKEL ALLOY AND COPPER ALLOY FASTENER
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 7
H547-0249-247Reference document
Same NSN cross-reference
Reference document — Secondary reference
0.250-20UNRC-3AX 0.500"D4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7383858-H5470249Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
H547-0001-H5470249-0247D4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
167-7106787-247D-0247D4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
H547-0001-H54702Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1677-10-678-7247?
1677-10-678-7247 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 1677-10-678-7247?
There are 7 known substitutes for 1677-10-678-7247: H547-0249-247, 0.250-20UNRC-3AX 0.500"D4, 7383858-H5470249 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1677-10-678-7247?
1677-10-678-7247 is cataloged in the U.S. Government catalog under NSN 5305-01-652-8572. This indicates validated use in U.S. government and defense supply chains.
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