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PartsTable / COMPONENT / R1393
R1393 ✓ 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: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, head_style: DOUBLE HEXAGON W/HOLE, head_height: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.428 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, surface_finish: 125.0 MICROINCHES TOP OF HEAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-143-3437, 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
R1393
NSN: 5306-00-143-3437
FSC: 5306
CAGE: 99207 — GENERAL ELECTRIC COMPANY DBA GE AEROSPACE (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
head_styleDOUBLE HEXAGON W/HOLE
head_height0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_class3A A
thread_length0.428 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
surface_finish125.0 MICROINCHES TOP OF HEAD
fastener_length0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
outside_diameter0.305 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentOXIDE FILM OVERALL
NSN5306-00-143-3437
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: R1393 · 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
•
THREAD LENGTH: 0.428 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
•
EXTENDED WASHER THICKNESS: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
•
HEAD STYLE: DOUBLE HEXAGON W/HOLE
•
SURFACE FINISH: 125.0 MICROINCHES TOP OF HEAD
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
MATERIAL: STEEL COMP 8740 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.428 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
EXTENDED WASHER THICKNESS0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
HEAD HEIGHT0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
SURFACE FINISH125.0 MICROINCHES TOP OF HEAD
NOMINAL THREAD DIAMETER0.190 INCHES IN
MATERIALSTEEL COMP 8740 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
SURFACE FINISH32.0 MICROINCHES THREADS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
16606A16PC3Interchangeable
interchangeable cross-reference
interchangeable
640685-4Interchangeable
interchangeable cross-reference
interchangeable
MS29513-8Interchangeable
interchangeable cross-reference
interchangeable
R1393P005Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R1393?
R1393 is a BOLT,MACHINE.
What parts can replace R1393?
There are 4 known substitutes for R1393: 16606A16PC3, 640685-4, MS29513-8 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R1393?
R1393 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-143-3437. 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