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1377820 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1377820: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT CHAMFER, head_height: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.371 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN, thread_length: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-348-8466, 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
1377820
NSN: 5305-01-348-8466
FSC: 5305 — Screws
CAGE: 94117 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. DBA BAE SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT CHAMFER
head_height0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.371 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN
thread_length0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
thread_directionRIGHT-HAND
shoulder_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentOXIDE OVERALL
internal_drive_styleSLOT
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-348-8466
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1377820 · 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: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
COLORBLACK OVERALL
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 1
7035-SS-26Same 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 1377820?
1377820 is a SCREW,SHOULDER.
What parts can replace 1377820?
There is 1 known substitute for 1377820: 7035-SS-26. Substitute compatibility should be verified for your specific system.
What is the NSN for 1377820?
1377820 is cataloged in the U.S. Government catalog under NSN 5305-01-348-8466. 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.