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21104671 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

21104671: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, fastener_length: 3.5 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: SCREW SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-643-4855, 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
21104671
NSN: 5305-01-643-4855
FSC: 5305 — Screws
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
head_styleHEXAGON
fastener_length3.5 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySCREW SHOULDER
NSN5305-01-643-4855
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21104671 · 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
•
FASTENER LENGTH: 3.5 INCHES NOMINAL IN
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
FASTENER LENGTH3.5 INCHES NOMINAL IN
HEAD STYLEHEXAGON
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW SHOULDER
SUBSTITUTES & CROSS-REFERENCES 2
DF2085-213 FIND 5Reference document
Same NSN cross-reference
Reference document — Secondary reference
DF2085-213#5Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 21104671?
21104671 is a SCREW,SHOULDER.
What parts can replace 21104671?
There are 2 known substitutes for 21104671: DF2085-213 FIND 5, DF2085-213#5. Substitute compatibility should be verified for your specific system.
What is the NSN for 21104671?
21104671 is cataloged in the U.S. Government catalog under NSN 5305-01-643-4855. 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.