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99-1212021 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

99-1212021: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: HEXAGON, head_height: 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.300 INCHES NOMINAL IN, fastener_length: 1.900 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-452-4903, 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
99-1212021
NSN: 5305-00-452-4903
FSC: 5305 — Screws
CAGE: 99995 — NATO STOCK NUMBER ASSIGNED BY ANOTHER NATION
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleHEXAGON
head_height0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
thread_class2A A
thread_length0.300 INCHES NOMINAL IN
fastener_length1.900 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_between_flats0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
nominal_thread_diameter0.138 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-452-4903
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 99-1212021 · 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: 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.900 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.300 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
FASTENER LENGTH1.900 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
THREAD LENGTH0.300 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH32
MATERIALSTEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 99-1212021?
99-1212021 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 99-1212021?
99-1212021 is cataloged in the U.S. Government catalog under NSN 5305-00-452-4903. 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.