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Technical Data Sheet
PartsTable / COMPONENT / N1401-81CD
N1401-81CD ✓ 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: EXTERNAL BOWED, usage_design: EXTERNAL, end_play_takeup: 0.023 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN, inside_diameter: 0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN, major_thickness: 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-068-4383, 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
N1401-81CD
NSN: 5325-00-068-4383
FSC: 5325
CAGE: 54963 — SEEGER INC ANDERTON-UNITED PRODUCTS DIV (USA)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL BOWED
usage_designEXTERNAL
end_play_takeup0.023 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
inside_diameter0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN
major_thickness0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66,SAE 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE OR AISI 1066 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-068-4383
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: N1401-81CD · 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 HARDNESS RATING: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,SAE 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE OR AISI 1066 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
INSIDE DIAMETER: 0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
END PLAY TAKEUP: 0.023 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
•
USAGE DESIGN: EXTERNAL
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL HARDNESS RATING66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,SAE 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE OR AISI 1066 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
INSIDE DIAMETER0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
END PLAY TAKEUP0.023 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
USAGE DESIGNEXTERNAL
CASEHARDENING INDICATORNOT CASEHARDENED
MAJOR THICKNESS0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
RING STYLEEXTERNAL BOWED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
510181Interchangeable
interchangeable cross-reference
interchangeable
54661Interchangeable
interchangeable cross-reference
interchangeable
500039Interchangeable
interchangeable cross-reference
interchangeable
MS16628-81Interchangeable
Same NIIN cross-reference
interchangeable
N1401-81ASInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N1401-81CD?
N1401-81CD is a RING,RETAINING.
What parts can replace N1401-81CD?
There are 5 known substitutes for N1401-81CD: 510181, 54661, 500039 and 2 more. Substitute compatibility should be verified for your specific system.
Is N1401-81CD still available?
N1401-81CD 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