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Technical Data Sheet
PartsTable / COMPONENT / E125-51
E125-51 ✓ 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, thread_class: 2A A, head_diameter: 0.130 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN, thread_length: 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, screw_material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 321 OR STEEL COMP 347, fastener_length: 0.094 INCHES MINIMUM AND 0.125 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 5305-00-880-7775, 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
E125-51
NSN: 5305-00-880-7775
FSC: 5305
CAGE: 97928 — HUCK INTL INC (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.130 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
thread_length0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
screw_materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 321 OR STEEL COMP 347
fastener_length0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
internal_drive_styleSLOT
nominal_thread_diameter0.073 INCHES IN
screw_surface_treatmentPASSIVATE
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
NSN5305-00-880-7775
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: E125-51 · 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
•
HEAD STYLE: FLAT COUNTERSUNK
•
INTERNAL DRIVE STYLE: SLOT
•
FASTENER LENGTH: 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
•
SCREW MATERIAL: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 321 OR STEEL COMP 347
•
NOMINAL THREAD DIAMETER: 0.073 INCHES IN
•
HEAD DIAMETER: 0.130 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLESLOT
FASTENER LENGTH0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
SCREW MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 321 OR STEEL COMP 347
NOMINAL THREAD DIAMETER0.073 INCHES IN
HEAD DIAMETER0.130 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
THREAD LENGTH0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
THREAD QUANTITY PER INCH64
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
255W4Interchangeable
interchangeable cross-reference
interchangeable
T65Interchangeable
interchangeable cross-reference
interchangeable
7521158Interchangeable
interchangeable cross-reference
interchangeable
965813-51CInterchangeable
Same NIIN cross-reference
interchangeable
106751-01-51CInterchangeable
Same NIIN cross-reference
interchangeable
9145-51Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is E125-51?
E125-51 is a SCREW,MACHINE.
What parts can replace E125-51?
There are 10 known substitutes for E125-51: 255W4, T65, 7521158 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E125-51?
E125-51 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-880-7775. 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