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GB511C4-8 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GB511C4-8: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include head_style: DOUBLE HEXAGON, grip_length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, head_height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.267 INCHES MINIMUM AND 0.334 INCHES MAXIMUM IN, hardness_rating: 51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-043-8053, 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
GB511C4-8
NSN: 5306-01-043-8053
FSC: 5306 — Bolts
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
head_styleDOUBLE HEXAGON
grip_length0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
head_height0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN
thread_class3A A
thread_length0.267 INCHES MINIMUM AND 0.334 INCHES MAXIMUM IN
hardness_rating51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF)
NSN5306-01-043-8053
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GB511C4-8 · 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: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.267 INCHES MINIMUM AND 0.334 INCHES MAXIMUM IN
•
HARDNESS RATING: 51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
SPECIFICATION/STANDARD DATA: 26512-GB511C PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
GRIP LENGTH: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN
THREAD LENGTH0.267 INCHES MINIMUM AND 0.334 INCHES MAXIMUM IN
HARDNESS RATING51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
SPECIFICATION/STANDARD DATA26512-GB511C PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
GRIP LENGTH0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 3
H402-4A8Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
BM170212-4-A8Reference document
Same NSN cross-reference
Reference document — Secondary reference
EWSB26-4-A8Reference 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 GB511C4-8?
GB511C4-8 is a BOLT,SHEAR.
What parts can replace GB511C4-8?
There are 3 known substitutes for GB511C4-8: H402-4A8, BM170212-4-A8, EWSB26-4-A8. Substitute compatibility should be verified for your specific system.
What is the NSN for GB511C4-8?
GB511C4-8 is cataloged in the U.S. Government catalog under NSN 5306-01-043-8053. 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.