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Technical Data Sheet
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43390-1 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

43390-1: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include head_style: DOUBLE HEXAGON W/HOLE, head_height: 0.375 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER, fastener_length: 3.365 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-113-8314, 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
43390-1
NSN: 5306-00-113-8314
FSC: 5306 — Bolts
CAGE: 55820 — RTX CORPORATION DIV PRATT & WHITNEY (USA)
SPECIFICATIONS
head_styleDOUBLE HEXAGON W/HOLE
head_height0.375 INCHES NOMINAL IN
thread_class3A A
thread_length0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length3.365 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN
shoulder_length0.120 INCHES MINIMUM AND 0.180 INCHES MAXIMUM FIRST SHOULDER IN
shoulder_diameter0.326 INCHES MINIMUM AND 0.327 INCHES MAXIMUM FIRST SHOULDER IN
width_between_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
end_item_identificationCRTL
nominal_thread_diameter0.312 INCHES IN
extended_washer_diameter0.500 INCHES NOMINAL IN
NSN5306-00-113-8314
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 43390-1 · 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: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.375 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.365 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.120 INCHES MINIMUM AND 0.180 INCHES MAXIMUM FIRST SHOULDER IN
•
EXTENDED WASHER DIAMETER: 0.500 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.326 INCHES MINIMUM AND 0.327 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
HEAD HEIGHT0.375 INCHES NOMINAL IN
FASTENER LENGTH3.365 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN
SHOULDER LENGTH0.120 INCHES MINIMUM AND 0.180 INCHES MAXIMUM FIRST SHOULDER IN
EXTENDED WASHER DIAMETER0.500 INCHES NOMINAL IN
SHOULDER DIAMETER0.326 INCHES MINIMUM AND 0.327 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
CRITICALITY CODE JUSTIFICATIONAGAV
NOMINAL THREAD DIAMETER0.312 INCHES IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 43390-1?
43390-1 is a BOLT,SHOULDER.
What is the NSN for 43390-1?
43390-1 is cataloged in the U.S. Government catalog under NSN 5306-00-113-8314. 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.