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GB511H18-56 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GB511H18-56: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: STEEL OR STEEL COMP H11 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 3.490 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN, head_height: 1.243 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 1.1225 INCHES MINIMUM AND 1.1240 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-151-5761, 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
GB511H18-56
NSN: 5306-00-151-5761
FSC: 5306 — Bolts
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OR STEEL COMP H11 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length3.490 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN
head_height1.243 INCHES NOMINAL IN
thread_class3A A
grip_diameter1.1225 INCHES MINIMUM AND 1.1240 INCHES MAXIMUM IN
thread_length1.912 INCHES MINIMUM AND 1.962 INCHES MAXIMUM IN
fastener_length5.422 INCHES MINIMUM AND 5.452 INCHES MAXIMUM IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats1.427 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN
NSN5306-00-151-5761
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GB511H18-56 · 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
•
EXTENDED WASHER THICKNESS: 0.280 INCHES NOMINAL IN
•
HEAD HEIGHT: 1.243 INCHES NOMINAL IN
•
FASTENER LENGTH: 5.422 INCHES MINIMUM AND 5.452 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 2.090 INCHES MINIMUM AND 2.100 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.912 INCHES MINIMUM AND 1.962 INCHES MAXIMUM IN
•
HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SPS-M-107 FSCM 56878 MFR REF 1ST MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.280 INCHES NOMINAL IN
HEAD HEIGHT1.243 INCHES NOMINAL IN
FASTENER LENGTH5.422 INCHES MINIMUM AND 5.452 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER2.090 INCHES MINIMUM AND 2.100 INCHES MAXIMUM IN
THREAD LENGTH1.912 INCHES MINIMUM AND 1.962 INCHES MAXIMUM IN
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSPS-M-107 FSCM 56878 MFR REF 1ST MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER1.125 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
SUBSTITUTES & CROSS-REFERENCES 3
VS2003F18-56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GB511GF18-56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
EWB22-18-56Reference 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 GB511H18-56?
GB511H18-56 is a BOLT,SHEAR.
What parts can replace GB511H18-56?
There are 3 known substitutes for GB511H18-56: VS2003F18-56, GB511GF18-56, EWB22-18-56. Substitute compatibility should be verified for your specific system.
What is the NSN for GB511H18-56?
GB511H18-56 is cataloged in the U.S. Government catalog under NSN 5306-00-151-5761. 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.