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H148-8-86 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

H148-8-86: 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: 5.365 INCHES MINIMUM AND 5.385 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.4982 INCHES MINIMUM AND 0.4991 INCHES MAXIMUM IN, head_diameter: 0.950 INCHES MINIMUM AND 1.017 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-059-0228, 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
H148-8-86
NSN: 5305-01-059-0228
FSC: 5305 — Screws
CAGE: 97928 — HUCK INTL INC (USA)
SPECIFICATIONS
materialSTEEL COMP H11 OVERALL
head_styleFLAT COUNTERSUNK
grip_length5.365 INCHES MINIMUM AND 5.385 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.4982 INCHES MINIMUM AND 0.4991 INCHES MAXIMUM IN
head_diameter0.950 INCHES MINIMUM AND 1.017 INCHES MAXIMUM IN
thread_length0.735 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES GRIP
fastener_length6.120 INCHES MINIMUM AND 6.167 INCHES MAXIMUM IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
NSN5305-01-059-0228
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: H148-8-86 · 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 GRIP
•
FASTENER LENGTH: 6.120 INCHES MINIMUM AND 6.167 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-8837 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.735 INCHES MINIMUM AND 0.802 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: 0.500 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES GRIP
FASTENER LENGTH6.120 INCHES MINIMUM AND 6.167 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-8837 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.735 INCHES MINIMUM AND 0.802 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 DIAMETER0.500 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH5.365 INCHES MINIMUM AND 5.385 INCHES MAXIMUM IN
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 4
GB510CE8-86Reference document
Same NSN cross-reference
Reference document — Secondary reference
GB510FD8-86Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
106706H-8-86Reference document
Same NSN cross-reference
Reference document — Secondary reference
GB510BC8-86Reference 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 H148-8-86?
H148-8-86 is a SCREW,CLOSE TOLERANCE.
What parts can replace H148-8-86?
There are 4 known substitutes for H148-8-86: GB510CE8-86, GB510FD8-86, 106706H-8-86 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H148-8-86?
H148-8-86 is cataloged in the U.S. Government catalog under NSN 5305-01-059-0228. 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.