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Technical Data Sheet
PartsTable / COMPONENT / 8A8594
8A8594 ✓ 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 1038, thread_class: 3A STUD THREAD A, thread_length: 0.938 INCHES MINIMUM STUD THREAD IN, overall_length: 2.125 INCHES NOMINAL IN, hardness_rating: 22.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM, special_features: BOTH ENDS CHAMFERED 0.062 IN. LG BY 45 DEG 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 5307-00-695-6551, 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
8A8594
NSN: 5307-00-695-6551
FSC: 5307
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1038
thread_class3A STUD THREAD A
thread_length0.938 INCHES MINIMUM STUD THREAD IN
overall_length2.125 INCHES NOMINAL IN
hardness_rating22.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
special_featuresBOTH ENDS CHAMFERED 0.062 IN. LG BY 45 DEG IN
nominal_thread_size0.562 INCHES STUD THREAD IN
thread_pitch_diameters+0.5092 TO 0.5132 INCHES NUT THREAD IN
thread_quantity_per_inch12 NUT THREAD
thread_series_designatorUNF STUD THREAD
material_document_and_classificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE
NSN5307-00-695-6551
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8A8594 · 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: 3A STUD THREAD A
•
THREAD LENGTH: 0.938 INCHES MINIMUM STUD THREAD IN
•
NOMINAL THREAD SIZE: 0.562 INCHES STUD THREAD IN
•
THREAD QUANTITY PER INCH: 12 NUT THREAD
•
THREAD SERIES DESIGNATOR: UNF STUD THREAD
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A STUD THREAD A
THREAD LENGTH0.938 INCHES MINIMUM STUD THREAD IN
OVERALL LENGTH2.125 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.562 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.562 INCHES NUT THREAD IN
SPECIAL FEATURESBOTH ENDS CHAMFERED 0.062 IN. LG BY 45 DEG IN
THREAD QUANTITY PER INCH12 NUT THREAD
THREAD SERIES DESIGNATORUNF STUD THREAD
HARDNESS RATING22.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
MATERIALSTEEL COMP 1038
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
4844Interchangeable
interchangeable cross-reference
interchangeable
80-4-5Interchangeable
interchangeable cross-reference
interchangeable
40-4-5Interchangeable
interchangeable cross-reference
interchangeable
485GOVInterchangeable
interchangeable cross-reference
interchangeable
RG24Interchangeable
interchangeable cross-reference
interchangeable
9140-0029Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8A8594?
8A8594 is a STUD,PLAIN.
What parts can replace 8A8594?
There are 10 known substitutes for 8A8594: 4844, 80-4-5, 40-4-5 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8A8594?
8A8594 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-695-6551. 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