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0121898 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

0121898: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, fastener_length: 220.0 MILLIMETERS NOMINAL MM, thread_direction: RIGHT-HAND, nominal_thread_diameter: 16.0 MILLIMETERS MM, thread_pitch_in_millimeters: 2.0, part_name_assigned_by_controlling_agency: HEX CAP SCREW. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-645-4271, 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
0121898
NSN: 5305-01-645-4271
FSC: 5305 — Screws
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
head_styleHEXAGON
fastener_length220.0 MILLIMETERS NOMINAL MM
thread_directionRIGHT-HAND
nominal_thread_diameter16.0 MILLIMETERS MM
thread_pitch_in_millimeters2.0
part_name_assigned_by_controlling_agencyHEX CAP SCREW
NSN5305-01-645-4271
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 0121898 · 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: 220.0 MILLIMETERS NOMINAL MM
•
THREAD PITCH IN MILLIMETERS: 2.0
•
NOMINAL THREAD DIAMETER: 16.0 MILLIMETERS MM
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
FASTENER LENGTH220.0 MILLIMETERS NOMINAL MM
THREAD PITCH IN MILLIMETERS2.0
NOMINAL THREAD DIAMETER16.0 MILLIMETERS MM
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
PART NAME ASSIGNED BY CONTROLLING AGENCYHEX CAP SCREW
SUBSTITUTES & CROSS-REFERENCES 2
12590276Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
12590276 ITEM 3Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 0121898?
0121898 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 0121898?
There are 2 known substitutes for 0121898: 12590276, 12590276 ITEM 3. Substitute compatibility should be verified for your specific system.
What is the NSN for 0121898?
0121898 is cataloged in the U.S. Government catalog under NSN 5305-01-645-4271. 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.