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Technical Data Sheet
PartsTable / COMPONENT / P4078891
P4078891 ✓ 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,EYE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shank_length: 1.750 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.750 INCHES NOMINAL IN, overall_length: 2.250 INCHES NOMINAL IN, hardness_rating: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-074-6817, 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
P4078891
NSN: 5306-01-074-6817
FSC: 5306
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
shank_length1.750 INCHES NOMINAL IN
thread_class2A A
thread_length0.750 INCHES NOMINAL IN
overall_length2.250 INCHES NOMINAL IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
style_designatorROUND, CLOSED
thread_directionRIGHT-HAND
surface_treatmentOXIDE OVERALL
eye_stock_diameter0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
eye_inside_diameter0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
NSN5306-01-074-6817
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: P4078891 · 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 CLASS: 2A A
•
EYE INSIDE DIAMETER: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
STYLE DESIGNATOR: ROUND, CLOSED
•
DISTANCE FROM CENTER OF EYE TO SHANK END: 2.000 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: OXIDE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
EYE INSIDE DIAMETER0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORROUND, CLOSED
DISTANCE FROM CENTER OF EYE TO SHANK END2.000 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTOXIDE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
EYE STOCK DIAMETER0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
AMS-QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
AC250SInterchangeable
interchangeable cross-reference
interchangeable
RE250Interchangeable
interchangeable cross-reference
interchangeable
616Interchangeable
interchangeable cross-reference
interchangeable
AND10136-3005Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P4078891?
P4078891 is a BOLT,EYE.
What parts can replace P4078891?
There are 20 known substitutes for P4078891: AMS-QQ-A-200/3, QQ-A-200/3, AC250S and 17 more. Substitute compatibility should be verified for your specific system.
Is P4078891 still available?
P4078891 is currently cancelled.
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Last verified: July 2026