PartsTable
Technical Data Sheet
656P4 ✓ 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 STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8735, thread_class: 3A NUT THREAD A, thread_length: 0.625 INCHES MINIMUM NUT THREAD IN, overall_length: 1.625 INCHES NOMINAL IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM, thread_direction: RIGHT-HAND STUD THREAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-298-7701, 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
656P4
NSN: 5307-00-298-7701
FSC: 5307
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialSTEEL COMP 8735
thread_class3A NUT THREAD A
thread_length0.625 INCHES MINIMUM NUT THREAD IN
overall_length1.625 INCHES NOMINAL IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND STUD THREAD
surface_treatmentCADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL
nominal_thread_size0.312 INCHES STUD THREAD IN
thread_pitch_diameters+0.2883 TO 0.2909 INCHES STUD THREAD IN
thread_quantity_per_inch24 NUT THREAD
thread_series_designatorUNS STUD THREAD
material_document_and_classificationAMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
NSN5307-00-298-7701
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 656P4 · 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: 0.625 INCHES MINIMUM NUT THREAD IN
THREAD QUANTITY PER INCH: 18 STUD THREAD
THREAD SERIES DESIGNATOR: UNS STUD THREAD
SURFACE TREATMENT: CADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL
MATERIAL: STEEL COMP 8735
THREAD CLASS: 3A NUT THREAD A
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.625 INCHES MINIMUM NUT THREAD IN
THREAD QUANTITY PER INCH18 STUD THREAD
THREAD SERIES DESIGNATORUNS STUD THREAD
SURFACE TREATMENTCADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL
MATERIALSTEEL COMP 8735
THREAD QUANTITY PER INCH24 NUT THREAD
THREAD SERIES DESIGNATORUNF NUT THREAD
THREAD CLASS3A NUT THREAD A
THREAD LENGTH0.875 INCHES MINIMUM STUD THREAD IN
THREAD DIRECTIONRIGHT-HAND NUT THREAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
656-4Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-1/1105Interchangeable
interchangeable cross-reference
interchangeable
MILE1-1105Interchangeable
interchangeable cross-reference
interchangeable
338366R91Interchangeable
interchangeable cross-reference
interchangeable
125-28Interchangeable
interchangeable cross-reference
interchangeable
71914-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 656P4?
656P4 is a STUD,PLAIN.
What parts can replace 656P4?
There are 11 known substitutes for 656P4: 656-4, MIL-PRF-1/1105, MILE1-1105 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 656P4?
656P4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-298-7701. This indicates validated use in U.S. government and defense supply chains.
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