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EC12339207 — STUD,RECESSED AND STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

EC12339207: STUD,RECESSED AND STEPPED.

The STUD,RECESSED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP 8640, thread_class: 2A NUT THREAD A, thread_length: 1.150 INCHES MINIMUM AND 1.310 INCHES MAXIMUM STUD THREAD IN, overall_length: 3.730 INCHES MINIMUM AND 3.790 INCHES MAXIMUM IN, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM, special_features: NUT END SHOULDER TAPERS 45 DEG.MIN AND 60 DEG.MAX AND 0.410 IN.LONG IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-188-1229, 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
EC12339207
NSN: 5307-01-188-1229
FSC: 5307 — Studs
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 8640
thread_class2A NUT THREAD A
thread_length1.150 INCHES MINIMUM AND 1.310 INCHES MAXIMUM STUD THREAD IN
overall_length3.730 INCHES MINIMUM AND 3.790 INCHES MAXIMUM IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
special_featuresNUT END SHOULDER TAPERS 45 DEG.MIN AND 60 DEG.MAX AND 0.410 IN.LONG IN
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentPHOSPHATE OVERALL
nominal_thread_size0.625 INCHES STUD THREAD IN
end_item_identificationMRAP - COMMON NSN - USED ON MRAP NO PERMANENT WSDC IDENTIFIED AND 2 OTHER WEAPON SYSTEMS
thread_quantity_per_inch20 NUT THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
NSN5307-01-188-1229
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: EC12339207 · 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: GM 4435-M,CODE A FSCM 34623 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.850 INCHES MINIMUM AND 0.910 INCHES MAXIMUM NUT THREAD IN
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A322 ASSN STD ALL MATERIAL RESPONSES
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONGM 4435-M,CODE A FSCM 34623 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.850 INCHES MINIMUM AND 0.910 INCHES MAXIMUM NUT THREAD IN
THREAD LENGTH1.150 INCHES MINIMUM AND 1.310 INCHES MAXIMUM STUD THREAD IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD ALL MATERIAL RESPONSES
OVERALL LENGTH3.730 INCHES MINIMUM AND 3.790 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.625 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.500 INCHES NUT THREAD IN
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
SUBSTITUTES & CROSS-REFERENCES 3
5307PL0783532Reference document
Same NSN cross-reference
Reference document — Informative reference only
5568298Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
0722726Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is EC12339207?
EC12339207 is a STUD,RECESSED AND STEPPED.
What parts can replace EC12339207?
There are 3 known substitutes for EC12339207: 5307PL0783532, 5568298, 0722726. Substitute compatibility should be verified for your specific system.
What is the NSN for EC12339207?
EC12339207 is cataloged in the U.S. Government catalog under NSN 5307-01-188-1229. 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.