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PartsTable / COMPONENT / R503REVA1PC25
R503REVA1PC25 ✓ 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,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OVERALL, head_style: HEXAGON, head_height: 0.391 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 1.500 INCHES MINIMUM IN, fastener_length: 3.000 INCHES NOMINAL 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 5305-00-584-7947, 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
R503REVA1PC25
NSN: 5305-00-584-7947
FSC: 5305
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OVERALL
head_styleHEXAGON
head_height0.391 INCHES NOMINAL IN
thread_class3A A
thread_length1.500 INCHES MINIMUM IN
fastener_length3.000 INCHES NOMINAL IN
hardness_rating80.0 ROCKWELL B MINIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.938 INCHES NOMINAL IN
minimum_yield_strength40000 POUNDS PER SQUARE INCH LBS
nominal_thread_diameter0.625 INCHES IN
NSN5305-00-584-7947
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: R503REVA1PC25 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CLA,FOR-1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
HEAD HEIGHT: 0.391 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY 400 OVERALL
•
MINIMUM YIELD STRENGTH: 40000 POUNDS PER SQUARE INCH LBS
•
HARDNESS RATING: 80.0 ROCKWELL B MINIMUM OVERALL
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CLA,FOR-1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.625 INCHES IN
HEAD HEIGHT0.391 INCHES NOMINAL IN
MATERIALNICKEL ALLOY 400 OVERALL
MINIMUM YIELD STRENGTH40000 POUNDS PER SQUARE INCH LBS
HARDNESS RATING80.0 ROCKWELL B MINIMUM OVERALL
HEAD STYLEHEXAGON
THREAD CLASS3A A
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
75514007-1Interchangeable
interchangeable cross-reference
interchangeable
A040Interchangeable
interchangeable cross-reference
interchangeable
3/8-16UNC-2A X 1IN TYI CLASSInterchangeable
interchangeable cross-reference
interchangeable
QQ-N-281 GRADE 400 CLASS AInterchangeable
interchangeable cross-reference
interchangeable
3/8-16UNC-2A X 1 INCHInterchangeable
interchangeable cross-reference
interchangeable
M1222RN10C244NANNInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R503REVA1PC25?
R503REVA1PC25 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace R503REVA1PC25?
There are 16 known substitutes for R503REVA1PC25: 75514007-1, A040, 3/8-16UNC-2A X 1IN TYI CLASS and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R503REVA1PC25?
R503REVA1PC25 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-584-7947. 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