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401 388 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

401 388: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, special_features: SUPERSESSION CHAIN, thread_direction: RIGHT-HAND, bearing_surface_type: CHAMFERED, end_item_identification: ELECTRICAL BOX COMPONENTS. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-584-4935, 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
401 388
NSN: 5306-00-584-4935
NIINs: 005844935, 016045099, 016157063
FSC: 5306 — Bolts
CAGE: 77294 — PIPER INDUSTRIAL MANUFACTURING COMPANY, LLC DIV PIPER INDUSTRIAL MANUFACTURING COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
special_featuresSUPERSESSION CHAIN
thread_directionRIGHT-HAND
bearing_surface_typeCHAMFERED
end_item_identificationELECTRICAL BOX COMPONENTS
nondefinitive_spec/std_data11 CLASS AND 0.0063 WEIGHT
part_name_assigned_by_controlling_agencyNUT (M8) STAINLESS STEEL
NSN5306-00-584-4935
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 401 388 · 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
•
HEAD HEIGHT: 0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.703 INCHES NOMINAL IN
•
THREAD LENGTH: 0.641 INCHES MINIMUM IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
SHANK UNTHREADED HOLE DIAMETER: 0.070 INCHES NOMINAL FIRST HOLE IN
•
HOLE CONFIGURATION STYLE: HEXAGON FLATS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-770 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
FASTENER LENGTH0.703 INCHES NOMINAL IN
THREAD LENGTH0.641 INCHES MINIMUM IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
SHANK UNTHREADED HOLE DIAMETER0.070 INCHES NOMINAL FIRST HOLE IN
HOLE CONFIGURATION STYLEHEXAGON FLATS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-770 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
SUBSTITUTES & CROSS-REFERENCES 1
AN6CH5ASame 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 401 388?
401 388 is a NUT,PLAIN,HEXAGON.
What parts can replace 401 388?
There is 1 known substitute for 401 388: AN6CH5A. Substitute compatibility should be verified for your specific system.
What is the NSN for 401 388?
401 388 is cataloged in the U.S. Government catalog under NSN 5306-00-584-4935. 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.