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401638 — PLATE,IDENTIFIC

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

401638: PLATE,IDENTIFIC.

The PLATE,IDENTIFIC is a the manufacturer industrial component. Key specifications include material: STEEL COMP 431 OVERALL, shank_length: 2.234 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.609 INCHES MINIMUM IN, overall_length: 2.734 INCHES NOMINAL IN, style_designator: ROUND, OPEN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-527-3602, 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
401638
NSN: 5306-00-527-3602
NIINs: 005273602, 006112083, 016522121
FSC: 5306 — Bolts
CAGE: 77948 — SINGER CO THE (USA)
SPECIFICATIONS
materialSTEEL COMP 431 OVERALL
shank_length2.234 INCHES NOMINAL IN
thread_class3A A
thread_length0.609 INCHES MINIMUM IN
overall_length2.734 INCHES NOMINAL IN
style_designatorROUND, OPEN
thread_directionRIGHT-HAND
eye_outside_width0.438 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
eye_inside_diameter0.249 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
eye_stock_thickness0.250 INCHES NOMINAL IN
nominal_thread_diameter0.190 INCHES IN
NSN5306-00-527-3602
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 401638 · 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 LENGTH: 0.609 INCHES MINIMUM IN
•
SHANK LENGTH: 2.234 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND, OPEN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18732 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
DISTANCE FROM CENTER OF EYE TO SHANK END: 2.422 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.609 INCHES MINIMUM IN
SHANK LENGTH2.234 INCHES NOMINAL IN
STYLE DESIGNATORROUND, OPEN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18732 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH2.734 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM CENTER OF EYE TO SHANK END2.422 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
EYE INSIDE DIAMETER0.249 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
60A52B77Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 401638?
401638 is a PLATE,IDENTIFIC.
What parts can replace 401638?
There is 1 known substitute for 401638: 60A52B77. Substitute compatibility should be verified for your specific system.
What is the NSN for 401638?
401638 is cataloged in the U.S. Government catalog under NSN 5306-00-527-3602. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.