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AC129436 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AC129436: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: KNURLED NO. 1, head_height: 0.156 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.419 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN, thread_length: 0.342 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-025-4374, 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
AC129436
NSN: 5305-01-025-4374
FSC: 5305 — Screws
CAGE: 8L513 — AIR INDUSTRIES MACHINING, CORP. DBA AIR INDUSTRIES MACHINING CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleKNURLED NO. 1
head_height0.156 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.419 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
thread_length0.342 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length1.914 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length1.497 INCHES MINIMUM AND 1.503 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresSTRIP TYPE LOCKING ELEMENT ON THREADS
thread_directionRIGHT-HAND
NSN5305-01-025-4374
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AC129436 · 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
•
WIDTH ACROSS FLATS: 0.156 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.914 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 1.497 INCHES MINIMUM AND 1.503 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.310 INCHES MINIMUM AND 0.311 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.342 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES MAXIMUM IN
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
FASTENER LENGTH1.914 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN
SHOULDER LENGTH1.497 INCHES MINIMUM AND 1.503 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.310 INCHES MINIMUM AND 0.311 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.342 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEKNURLED NO. 1
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 2
AC-331336Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
12705L-5C-24Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 AC129436?
AC129436 is a SCREW,SHOULDER.
What parts can replace AC129436?
There are 2 known substitutes for AC129436: AC-331336, 12705L-5C-24. Substitute compatibility should be verified for your specific system.
What is the NSN for AC129436?
AC129436 is cataloged in the U.S. Government catalog under NSN 5305-01-025-4374. 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.