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402126 — 402126

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

402126: 402126.

The 402126 is a the manufacturer industrial component. Key specifications include style_designator: CIRCULAR. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-837-7791, 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
402126
NSN: 5307-00-837-7791
NIINs: 008377791, 008964944, 012533738
FSC: 5307 — Studs
CAGE: 3NNX8 — BRIGHTON CROMWELL LLC (USA)
SPECIFICATIONS
style_designatorCIRCULAR
NSN5307-00-837-7791
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 402126 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
COTTER PIN HOLE DIAMETER: 0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN
•
THREAD LENGTH: 0.680 INCHES MINIMUM STUD THREAD IN
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
•
THREAD PITCH DIAMETERS: +0.2878 TO 0.2890 INCHES STUD THREAD IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
COTTER PIN HOLE DIAMETER0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN
THREAD LENGTH0.680 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH0.560 INCHES MINIMUM NUT THREAD IN
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
THREAD PITCH DIAMETERS+0.2878 TO 0.2890 INCHES STUD THREAD IN
OVERALL LENGTH1.440 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.312 INCHES NUT THREAD IN
SUBSTITUTES & CROSS-REFERENCES 2
8376449Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
5307008377791Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 402126?
402126 is a 402126.
What parts can replace 402126?
There are 2 known substitutes for 402126: 8376449, 5307008377791. Substitute compatibility should be verified for your specific system.
What is the NSN for 402126?
402126 is cataloged in the U.S. Government catalog under NSN 5307-00-837-7791. 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.