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74171 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

74171: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.100 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.312 INCHES NOMINAL IN, thread_length: 0.219 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-286-8974, 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
74171
NSN: 5305-00-286-8974
FSC: 5305 — Screws
CAGE: 57712 — TELEMECHANICS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.100 INCHES NOMINAL IN
thread_class3A A
head_diameter0.312 INCHES NOMINAL IN
thread_length0.219 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.500 INCHES NOMINAL IN
shoulder_length0.070 INCHES NOMINAL FIRST SHOULDER IN
special_featuresTHD PORTION ECCENTRIC,OFFSET 0.023 IN. BELOW CENTER IN
thread_directionRIGHT-HAND
features_providedCASEHARDENED
NSN5305-00-286-8974
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 74171 · 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: 0.100 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.070 INCHES NOMINAL FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.219 INCHES NOMINAL FIRST SHOULDER IN
•
THREAD LENGTH: 0.219 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.100 INCHES NOMINAL IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
SHOULDER LENGTH0.070 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER DIAMETER0.219 INCHES NOMINAL FIRST SHOULDER IN
THREAD LENGTH0.219 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.138 INCHES IN
FEATURES PROVIDEDCASEHARDENED
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74171?
74171 is a SCREW,SHOULDER.
What is the NSN for 74171?
74171 is cataloged in the U.S. Government catalog under NSN 5305-00-286-8974. 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.