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Technical Data Sheet
PartsTable / COMPONENT / 5306AC1-020-3
5306AC1-020-3 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OR STEEL COMP 4340 OVERALL, head_style: FLAT CHAMFER, head_height: 0.246 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.750 INCHES NOMINAL IN, thread_length: 0.375 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-736-4078, 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
5306AC1-020-3
NSN: 5306-00-736-4078
FSC: 5306
CAGE: 81996 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OR STEEL COMP 4340 OVERALL
head_styleFLAT CHAMFER
head_height0.246 INCHES NOMINAL IN
thread_class3A A
head_diameter1.750 INCHES NOMINAL IN
thread_length0.375 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length5.379 INCHES NOMINAL IN
shoulder_length5.002 INCHES MINIMUM AND 5.004 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter1.249 INCHES MINIMUM AND 1.250 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
NSN5306-00-736-4078
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5306AC1-020-3 · 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
•
NOMINAL THREAD DIAMETER: 1.125 INCHES IN
•
MATERIAL: STEEL COMP E4340 OR STEEL COMP 4340 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
FASTENER LENGTH: 5.379 INCHES NOMINAL IN
•
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER: 5.223 INCHES NOMINAL FIRST HOLE IN
•
HEAD DIAMETER: 1.750 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 1.249 INCHES MINIMUM AND 1.250 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER1.125 INCHES IN
MATERIALSTEEL COMP E4340 OR STEEL COMP 4340 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC ALL MATERIAL RESPONSES OVERALL
FASTENER LENGTH5.379 INCHES NOMINAL IN
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER5.223 INCHES NOMINAL FIRST HOLE IN
HEAD DIAMETER1.750 INCHES NOMINAL IN
SHOULDER DIAMETER1.249 INCHES MINIMUM AND 1.250 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER SHAPEROUND FIRST SHOULDER
MINIMUM TENSILE STRENGTH180000 POUNDS PER SQUARE INCH LBS
THREAD QUANTITY PER INCH1 1/8-16
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
SC200110-4Interchangeable
interchangeable cross-reference
interchangeable
1134AInterchangeable
interchangeable cross-reference
interchangeable
ES2816-1Interchangeable
interchangeable cross-reference
interchangeable
51655Interchangeable
interchangeable cross-reference
interchangeable
49240Interchangeable
interchangeable cross-reference
interchangeable
51647Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5306AC1-020-3?
5306AC1-020-3 is a BOLT,SHOULDER.
What parts can replace 5306AC1-020-3?
There are 7 known substitutes for 5306AC1-020-3: SC200110-4, 1134A, ES2816-1 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5306AC1-020-3?
5306AC1-020-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-736-4078. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026