SM8-51 — STUD,LOCKED IN

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

SM8-51: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130, thread_length: 16.7 MILLIMETERS MINIMUM AND 17.3 MILLIMETERS MAXIMUM STUD THREAD MM, overall_length: 75.0 MILLIMETERS NOMINAL MM, locking_feature: RING, LOCK SERRATED, style_designator: LOCKED IN, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-417-5437, 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

SM8-51

NSN: 5307-01-417-5437
FSC: 5307 — Studs
CAGE: 83324 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV ROSAN PRODUCTS (USA)

SPECIFICATIONS

material	STEEL COMP 4130
thread_length	16.7 MILLIMETERS MINIMUM AND 17.3 MILLIMETERS MAXIMUM STUD THREAD MM
overall_length	75.0 MILLIMETERS NOMINAL MM
locking_feature	RING, LOCK SERRATED
style_designator	LOCKED IN
thread_direction	RIGHT-HAND NUT THREAD
nominal_thread_size	8.0 MILLIMETERS STUD THREAD MM
thread_tolerance_class	4H EXTERNAL STUD THREAD
thread_series_designator	ISO M STUD THREAD
thread_pitch_in_millimeters	1.50 STUD THREAD
distance_from_serrated_portion_to_nut_end	50.750 MILLIMETERS MINIMUM AND 51.250 MILLIMETERS MAXIMUM MM
distance_from_serrated_portion_to_stud_end	18.6 MILLIMETERS MINIMUM AND 19.4 MILLIMETERS MAXIMUM MM
NSN	5307-01-417-5437

COMPONENT DIAGRAM

KEY FEATURES

•

THREAD TOLERANCE CLASS: 4H EXTERNAL STUD THREAD

•

DISTANCE FROM SERRATED PORTION TO NUT END: 50.750 MILLIMETERS MINIMUM AND 51.250 MILLIMETERS MAXIMUM MM

•

THREAD PITCH IN MILLIMETERS: 1.50 STUD THREAD

•

THREAD LENGTH: 16.7 MILLIMETERS MINIMUM AND 17.3 MILLIMETERS MAXIMUM STUD THREAD MM

•

STYLE DESIGNATOR: LOCKED IN

TECHNICAL CHARACTERISTICS

THREAD TOLERANCE CLASS	4H EXTERNAL STUD THREAD
THREAD TOLERANCE CLASS	4H EXTERNAL NUT THREAD
DISTANCE FROM SERRATED PORTION TO NUT END	50.750 MILLIMETERS MINIMUM AND 51.250 MILLIMETERS MAXIMUM MM
THREAD PITCH IN MILLIMETERS	1.50 STUD THREAD
THREAD PITCH IN MILLIMETERS	1.25 NUT THREAD
THREAD LENGTH	16.7 MILLIMETERS MINIMUM AND 17.3 MILLIMETERS MAXIMUM STUD THREAD MM
THREAD LENGTH	18.6 MILLIMETERS MINIMUM AND 19.4 MILLIMETERS MAXIMUM NUT THREAD MM
STYLE DESIGNATOR	LOCKED IN
OVERALL LENGTH	75.0 MILLIMETERS NOMINAL MM
DISTANCE FROM SERRATED PORTION TO END OF STUD THREAD	5.0 MILLIMETERS NOMINAL MM

OTHER ITEMS IN FSC 5307 — Studs

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625

SUBSTITUTES & CROSS-REFERENCES 1

AESM8-5.1Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is SM8-51?

SM8-51 is a STUD,LOCKED IN.

What parts can replace SM8-51?

There is 1 known substitute for SM8-51: AESM8-5.1. Substitute compatibility should be verified for your specific system.

What is the NSN for SM8-51?

SM8-51 is cataloged in the U.S. Government catalog under NSN 5307-01-417-5437. This indicates validated use in U.S. government and defense supply chains.

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