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74328-12-18X — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

74328-12-18X: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON W/HOLE, head_height: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-046-5300, 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
74328-12-18X
NSN: 5306-01-046-5300
FSC: 5306 — Bolts
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON W/HOLE
head_height0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN
thread_class3A A
thread_length1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.162 INCHES MINIMUM AND 2.192 INCHES MAXIMUM IN
shoulder_length1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.779 INCHES MINIMUM AND 0.780 INCHES MAXIMUM FIRST SHOULDER IN
width_between_flats0.803 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN
nominal_thread_diameter0.750 INCHES IN
NSN5306-01-046-5300
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 74328-12-18X · 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: 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.162 INCHES MINIMUM AND 2.192 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN
•
EXTENDED WASHER DIAMETER: 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.779 INCHES MINIMUM AND 0.780 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
HEAD HEIGHT0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN
FASTENER LENGTH2.162 INCHES MINIMUM AND 2.192 INCHES MAXIMUM IN
SHOULDER LENGTH1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN
EXTENDED WASHER DIAMETER1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN
SHOULDER DIAMETER0.779 INCHES MINIMUM AND 0.780 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
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 4
ST3M607-12-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VS3061-12-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VAL23033-12X18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BM3326-12-18YReference 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 74328-12-18X?
74328-12-18X is a BOLT,SHOULDER.
What parts can replace 74328-12-18X?
There are 4 known substitutes for 74328-12-18X: ST3M607-12-18, VS3061-12-18, VAL23033-12X18 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 74328-12-18X?
74328-12-18X is cataloged in the U.S. Government catalog under NSN 5306-01-046-5300. 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.