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Technical Data Sheet
PartsTable / COMPONENT / N1501-25
N1501-25 ✓ 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 RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: E BOWED, usage_design: EXTERNAL, end_play_takeup: 0.024 INCHES MAXIMUM IN, inside_diameter: 0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN, major_thickness: 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-663-2400, 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
N1501-25
NSN: 5325-00-663-2400
FSC: 5325
CAGE: 54963 — SEEGER INC ANDERTON-UNITED PRODUCTS DIV (USA)
SPECIFICATIONS
materialSTEEL
ring_styleE BOWED
usage_designEXTERNAL
end_play_takeup0.024 INCHES MAXIMUM IN
inside_diameter0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
major_thickness0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating66.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD NO. 66,FS1066 TO FS1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-663-2400
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: N1501-25 · 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
•
RING STYLE: E BOWED
•
END PLAY TAKEUP: 0.024 INCHES MAXIMUM IN
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD NO. 66,FS1066 TO FS1090 FED STD SINGLE MATERIAL RESPONSE
•
USAGE DESIGN: EXTERNAL
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL HARDNESS RATING: 66.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
INSIDE DIAMETER: 0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
RING STYLEE BOWED
END PLAY TAKEUP0.024 INCHES MAXIMUM IN
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD NO. 66,FS1066 TO FS1090 FED STD SINGLE MATERIAL RESPONSE
USAGE DESIGNEXTERNAL
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIAL HARDNESS RATING66.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
INSIDE DIAMETER0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
MAJOR THICKNESS0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
NAS1201B13A24AInterchangeable
interchangeable cross-reference
interchangeable
BE-25Interchangeable
interchangeable cross-reference
interchangeable
533300-0037Interchangeable
interchangeable cross-reference
interchangeable
5131-25Interchangeable
interchangeable cross-reference
interchangeable
103475-01Interchangeable
interchangeable cross-reference
interchangeable
103475-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N1501-25?
N1501-25 is a RING,RETAINING.
What parts can replace N1501-25?
There are 11 known substitutes for N1501-25: NAS1201B13A24A, BE-25, 533300-0037 and 8 more. Substitute compatibility should be verified for your specific system.
Is N1501-25 still available?
N1501-25 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026