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Technical Data Sheet
PartsTable / COMPONENT / 81081 PC 3
81081 PC 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,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: SQUARE, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.500 INCHES IN, thread_series_designator: UNIFIED NATIONAL COARSE (UNC), material_document_and_classification: AISI4140 ASSN STD 1ST MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-470-0449, 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
81081 PC 3
NSN: 5306-01-470-0449
FSC: 5306
CAGE: 52670 — OLSON TECHNOLOGIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleSQUARE
thread_directionRIGHT-HAND
nominal_thread_diameter0.500 INCHES IN
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationAISI4140 ASSN STD 1ST MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5306-01-470-0449
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 81081 PC 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: 0.500 INCHES IN
•
HEAD STYLE: SQUARE
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI4140 ASSN STD 1ST MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLESQUARE
THREAD DIRECTIONRIGHT-HAND
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIAL DOCUMENT AND CLASSIFICATIONAISI4140 ASSN STD 1ST MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
919483-19Interchangeable
interchangeable cross-reference
interchangeable
13770Interchangeable
interchangeable cross-reference
interchangeable
8108-3Interchangeable
interchangeable cross-reference
interchangeable
8108-1Interchangeable
interchangeable cross-reference
interchangeable
81081ASInterchangeable
interchangeable cross-reference
interchangeable
013770Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 81081 PC 3?
81081 PC 3 is a BOLT,MACHINE.
What parts can replace 81081 PC 3?
There are 12 known substitutes for 81081 PC 3: 919483-19, 13770, 8108-3 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 81081 PC 3?
81081 PC 3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-470-0449. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026