PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1-4-20X1
1-4-20X1 ✓ 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,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, neck_width: 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, head_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, neck_length: 0.141 INCHES NOMINAL IN, thread_class: 2A A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-216-1125, 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
1-4-20X1
NSN: 5306-00-216-1125
FSC: 5306
CAGE: 09712 — CORTELCO CANADA INC (CAN)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
neck_width0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
neck_length0.141 INCHES NOMINAL IN
thread_class2A A
head_diameter0.578 INCHES NOMINAL IN
thread_length0.750 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES THREADS
fastener_length0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentZINC AND CHROMATE OVERALL
NSN5306-00-216-1125
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1-4-20X1 · 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
•
HEAD STYLE: BUTTON
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: COPPER ALLOY OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD CLASS: 2A A
•
NECK LENGTH: 0.141 INCHES NOMINAL IN
•
HEAD DIAMETER: 0.578 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEBUTTON
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALCOPPER ALLOY OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD CLASS2A A
NECK LENGTH0.141 INCHES NOMINAL IN
HEAD DIAMETER0.578 INCHES NOMINAL IN
HEAD HEIGHT0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
NECK WIDTH0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
THREAD LENGTH0.750 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
6477-32Interchangeable
interchangeable cross-reference
interchangeable
50055Interchangeable
interchangeable cross-reference
interchangeable
S1616Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1-4-20X1?
1-4-20X1 is a BOLT,SQUARE NECK.
What parts can replace 1-4-20X1?
There are 3 known substitutes for 1-4-20X1: 6477-32, 50055, S1616. Substitute compatibility should be verified for your specific system.
What is the NSN for 1-4-20X1?
1-4-20X1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-216-1125. 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