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Technical Data Sheet
PartsTable / COMPONENT / 237668
237668 ✓ 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 SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, head_diameter: 0.359 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, thread_length: 0.291 INCHES MINIMUM AND 0.412 INCHES MAXIMUM IN, screw_material: STEEL COMP 601, fastener_length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-298-8312, 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
237668
NSN: 5305-00-298-8312
FSC: 5305
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
head_diameter0.359 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_length0.291 INCHES MINIMUM AND 0.412 INCHES MAXIMUM IN
screw_materialSTEEL COMP 601
fastener_length0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
internal_drive_styleSLOT
nominal_thread_diameter0.190 INCHES IN
screw_surface_treatmentNICKEL AND CADMIUM AND CHROMATE
minimum_tensile_strength140000 POUNDS PER SQUARE INCH LBS
NSN5305-00-298-8312
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 237668 · 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
•
MINIMUM TENSILE STRENGTH: 140000 POUNDS PER SQUARE INCH LBS
•
SCREW SURFACE TREATMENT: NICKEL AND CADMIUM AND CHROMATE
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
HEAD DIAMETER: 0.359 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
NONSTANDARD THREAD PITCH DIAMETER: +0.1575 TO 0.1599 INCHES IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
COUNTERSINK ANGLE: 82.0 DEGREES NOMINAL
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2416 ASSN STD ALL TREATMENT RESPONSES
TECHNICAL CHARACTERISTICS (FLIS)
MINIMUM TENSILE STRENGTH140000 POUNDS PER SQUARE INCH LBS
SCREW SURFACE TREATMENTNICKEL AND CADMIUM AND CHROMATE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HEAD DIAMETER0.359 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
NONSTANDARD THREAD PITCH DIAMETER+0.1575 TO 0.1599 INCHES IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2416 ASSN STD ALL TREATMENT RESPONSES
THREAD QUANTITY PER INCH24
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
00145Interchangeable
interchangeable cross-reference
interchangeable
00-0302Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 237668?
237668 is a SCREW,MACHINE.
What parts can replace 237668?
There are 2 known substitutes for 237668: 00145, 00-0302. Substitute compatibility should be verified for your specific system.
What is the NSN for 237668?
237668 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-298-8312. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026