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3M943C4C3-25 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3M943C4C3-25: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303SE OVERALL, shank_length: 0.533 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.345 INCHES NOMINAL IN, overall_length: 2.656 INCHES NOMINAL IN, shank_diameter: 0.2490 INCHES MINIMUM AND 0.2496 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-356-7251, 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
3M943C4C3-25
NSN: 5315-01-356-7251
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303SE OVERALL
shank_length0.533 INCHES NOMINAL IN
thread_class3A A
thread_length0.345 INCHES NOMINAL IN
overall_length2.656 INCHES NOMINAL IN
shank_diameter0.2490 INCHES MINIMUM AND 0.2496 INCHES MAXIMUM IN
first_end_styleSQUARE
second_end_styleCHAMFERED
special_featuresROLLED RADIUS 0.040IN MAX ON BOTH SHANKS ADJACENT TO SHOULDER IN
style_designatorSHOULDER
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
NSN5315-01-356-7251
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3M943C4C3-25 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SHANK DIAMETER: 0.2490 INCHES MINIMUM AND 0.2496 INCHES MAXIMUM IN
•
SECOND SHANK DIAMETER: 0.3710 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN
•
FIRST END LOCATION: THREADED END
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.345 INCHES NOMINAL IN
•
FIRST END STYLE: SQUARE
•
SHANK LENGTH: 0.533 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDER
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.2490 INCHES MINIMUM AND 0.2496 INCHES MAXIMUM IN
SECOND SHANK DIAMETER0.3710 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN
FIRST END LOCATIONTHREADED END
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.345 INCHES NOMINAL IN
FIRST END STYLESQUARE
SHANK LENGTH0.533 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 COND B FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 COND B FED SPEC 2ND MATERIAL RESPONSE OR MCAIRMMS265 CAGEC 76301 MFR REF 3RD MATERIAL RESPONSE OVERALL
OVERALL LENGTH2.656 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 5
D792684CC3N25Reference document
Same NSN cross-reference
Reference document — Secondary reference
11415C4C3-25Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AAP139C4-3-25Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AAP139C4C3-25Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
D79268CC3N25Same 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 3M943C4C3-25?
3M943C4C3-25 is a PIN,SHOULDER,HEADLESS.
What parts can replace 3M943C4C3-25?
There are 5 known substitutes for 3M943C4C3-25: D792684CC3N25, 11415C4C3-25, AAP139C4-3-25 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M943C4C3-25?
3M943C4C3-25 is cataloged in the U.S. Government catalog under NSN 5315-01-356-7251. 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.