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3M55-5-3 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M55-5-3: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.075 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.629 INCHES MINIMUM AND 0.634 INCHES MAXIMUM IN, thread_length: 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-224-1010, 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
3M55-5-3
NSN: 5305-00-224-1010
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.075 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.629 INCHES MINIMUM AND 0.634 INCHES MAXIMUM IN
thread_length0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
shoulder_length0.101 INCHES MINIMUM AND 0.123 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresFURNISHED W/ONE O RING
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
NSN5305-00-224-1010
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M55-5-3 · 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: 0.075 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.101 INCHES MINIMUM AND 0.123 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 3-57,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.3422 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: 3-57,FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.075 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
FASTENER LENGTH0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
SHOULDER LENGTH0.101 INCHES MINIMUM AND 0.123 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION3-57,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.3422 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATION3-57,FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
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 3
HT52UA3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HT405A5-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
54268-5-3Reference 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 3M55-5-3?
3M55-5-3 is a SCREW,SHOULDER.
What parts can replace 3M55-5-3?
There are 3 known substitutes for 3M55-5-3: HT52UA3, HT405A5-3, 54268-5-3. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M55-5-3?
3M55-5-3 is cataloged in the U.S. Government catalog under NSN 5305-00-224-1010. 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.