PartsTable
Technical Data Sheet
1206509-1 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: HEXAGON, nut_height: 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-637-0442, 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
1206509-1
NSN: 5310-00-637-0442
FSC: 5310
CAGE: 19315 — HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS FORMER BENDIX NAVIGATION AND CONTROL SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleHEXAGON
nut_height0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
nominal_thread_size0.073 INCHES IN
bearing_surface_typeFLAT
counterbore_diameter0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM NUT IN
nut_counterbore_depth0.164 INCHES MINIMUM AND 0.174 INCHES MAXIMUM NUT IN
thread_quantity_per_inch72
NSN5310-00-637-0442
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1206509-1 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
THREAD DIRECTION: RIGHT-HAND
NUT COUNTERBORE DEPTH: 0.164 INCHES MINIMUM AND 0.174 INCHES MAXIMUM NUT IN
MATERIAL: STEEL COMP 303 OVERALL
NOMINAL THREAD SIZE: 0.073 INCHES IN
THREAD CLASS: 3B
COUNTERBORE DIAMETER: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM NUT IN
NUT HEIGHT: 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
BEARING SURFACE TYPE: FLAT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NUT COUNTERBORE DEPTH0.164 INCHES MINIMUM AND 0.174 INCHES MAXIMUM NUT IN
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD SIZE0.073 INCHES IN
THREAD CLASS3B
COUNTERBORE DIAMETER0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM NUT IN
NUT HEIGHT0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
BEARING SURFACE TYPEFLAT
NUT STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720,COND B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
100-1020S55Interchangeable
interchangeable cross-reference
interchangeable
100-1020S159Interchangeable
interchangeable cross-reference
interchangeable
00080Interchangeable
interchangeable cross-reference
interchangeable
M83953-3Interchangeable
interchangeable cross-reference
interchangeable
500074Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-83953Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1206509-1?
1206509-1 is a NUT,PLAIN,HEXAGON.
What parts can replace 1206509-1?
There are 8 known substitutes for 1206509-1: 100-1020S55, 100-1020S159, 00080 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1206509-1?
1206509-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-637-0442. This indicates validated use in U.S. government and defense supply chains.
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