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H185B3-9R — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

H185B3-9R: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP H11 OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN, head_diameter: 0.258 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-682-7262, 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
H185B3-9R
NSN: 5305-01-682-7262
FSC: 5305 — Screws
CAGE: 17446 — HUCK INTERNATIONAL, INC (USA)
SPECIFICATIONS
materialSTEEL COMP H11 OVERALL
head_styleFLAT COUNTERSUNK
grip_length0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
head_diameter0.258 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
thread_length0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES GRIP
fastener_length0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
NSN5305-01-682-7262
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: H185B3-9R · 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
•
SURFACE FINISH: 32.0 MICROINCHES THREADS
•
FASTENER LENGTH: 0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
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SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-83488, TYPE 2, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
•
HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.2500 INCHES IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH32.0 MICROINCHES GRIP
FASTENER LENGTH0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-83488, TYPE 2, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.2500 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 2
VT1694AS39RReference document
Same NSN cross-reference
Reference document — Secondary reference
C7985B3-9RReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
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 H185B3-9R?
H185B3-9R is a SCREW,CLOSE TOLERANCE.
What parts can replace H185B3-9R?
There are 2 known substitutes for H185B3-9R: VT1694AS39R, C7985B3-9R. Substitute compatibility should be verified for your specific system.
What is the NSN for H185B3-9R?
H185B3-9R is cataloged in the U.S. Government catalog under NSN 5305-01-682-7262. 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.