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Technical Data Sheet
PartsTable / COMPONENT / 309845
309845 ✓ 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 CRYSTAL UNIT,QUARTZ is a the manufacturer industrial component. Key specifications include material: STEEL COMP 601 OVERALL, body_width: 0.725 INCHES MAXIMUM IN, head_style: HEXAGON, body_length: 0.775 INCHES MAXIMUM IN, head_height: 0.166 INCHES NOMINAL IN, overall_width: 0.757 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-550-2686, 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
309845
NSN: 5306-00-550-2686
FSC: 5306
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 601 OVERALL
body_width0.725 INCHES MAXIMUM IN
head_styleHEXAGON
body_length0.775 INCHES MAXIMUM IN
head_height0.166 INCHES NOMINAL IN
overall_width0.757 INCHES MAXIMUM IN
thread_length0.377 INCHES MINIMUM IN
body_thickness0.317 INCHES MAXIMUM IN
overall_length1.023 INCHES MAXIMUM IN
fastener_length0.448 INCHES NOMINAL IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
terminal_length0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
NSN5306-00-550-2686
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 309845 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD LENGTH: 0.377 INCHES MINIMUM IN
•
SURFACE TREATMENT: NICKEL AND CADMIUM OVERALL
•
WIDTH BETWEEN FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.166 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNF
THREAD LENGTH0.377 INCHES MINIMUM IN
SURFACE TREATMENTNICKEL AND CADMIUM OVERALL
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
HEAD HEIGHT0.166 INCHES NOMINAL IN
FASTENER LENGTH0.448 INCHES NOMINAL IN
NONSTANDARD THREAD PITCH DIAMETER+0.2213 TO 0.2238 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
CR-65/U42.703700MHZInterchangeable
interchangeable cross-reference
interchangeable
CR65/U42M70370Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-3098/43Interchangeable
interchangeable cross-reference
interchangeable
8144-45Interchangeable
interchangeable cross-reference
interchangeable
310071Interchangeable
interchangeable cross-reference
interchangeable
309845Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 309845?
309845 is a CRYSTAL UNIT,QUARTZ.
What parts can replace 309845?
There are 6 known substitutes for 309845: CR-65/U42.703700MHZ, CR65/U42M70370, MIL-PRF-3098/43 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 309845?
309845 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-550-2686. 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