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C2898-2 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

C2898-2: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: VANADIUM OVERALL, head_style: BEVEL-CONICAL, head_height: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.122 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN, thread_length: 0.820 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-891-3674, 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
C2898-2
NSN: 5305-00-891-3674
FSC: 5305 — Screws
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialVANADIUM OVERALL
head_styleBEVEL-CONICAL
head_height0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.122 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
thread_length0.820 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.900 INCHES MINIMUM AND 2.920 INCHES MAXIMUM IN
hardness_rating55.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresUNDERCUT UNDER THE SHOULDER 0.050 IN. MIN AND 0.100 IN. MAX LG; 0.615 IN. MIN AND 0.625 IN. MAX DIA IN
thread_directionRIGHT-HAND
NSN5305-00-891-3674
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C2898-2 · 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
•
WIDTH ACROSS FLATS: 0.375 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.900 INCHES MINIMUM AND 2.920 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-8837,TY 1 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.748 INCHES MINIMUM AND 0.749 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.820 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.375 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
HEAD HEIGHT0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
FASTENER LENGTH2.900 INCHES MINIMUM AND 2.920 INCHES MAXIMUM IN
SHOULDER LENGTH2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-8837,TY 1 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.748 INCHES MINIMUM AND 0.749 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.820 INCHES NOMINAL IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING55.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 1
207-12-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C2898-2?
C2898-2 is a SCREW,SHOULDER.
What parts can replace C2898-2?
There is 1 known substitute for C2898-2: 207-12-2. Substitute compatibility should be verified for your specific system.
What is the NSN for C2898-2?
C2898-2 is cataloged in the U.S. Government catalog under NSN 5305-00-891-3674. 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.