877BT-4SB-45 — STUD,LOCKED IN

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

877BT-4SB-45: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, thread_class: 3A NUT THREAD A, thread_length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM NUT THREAD IN, surface_finish: 125.0 MICROINCHES OVERALL, locking_feature: RING, LOCK KEYED, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-043-9674, 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

877BT-4SB-45

NSN: 5307-01-043-9674
FSC: 5307 — Studs
CAGE: 75237 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV MICRODOT PRODUCTS (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING
thread_class	3A NUT THREAD A
thread_length	0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM NUT THREAD IN
surface_finish	125.0 MICROINCHES OVERALL
locking_feature	RING, LOCK KEYED
thread_direction	RIGHT-HAND NUT THREAD
nominal_thread_size	0.250 INCHES NUT THREAD IN
thread_quantity_per_inch	28 NUT THREAD
thread_series_designator	UNJC NUT THREAD
material_document_and_classification	AMS5504 ASSN STD SINGLE MATERIAL RESPONSE
NSN	5307-01-043-9674

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 125.0 MICROINCHES OVERALL

•

THREAD LENGTH: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM NUT THREAD IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS5504 ASSN STD SINGLE MATERIAL RESPONSE

•

THREAD DIRECTION: RIGHT-HAND STUD THREAD

•

NOMINAL THREAD SIZE: 0.250 INCHES NUT THREAD IN

TECHNICAL CHARACTERISTICS

SURFACE FINISH	125.0 MICROINCHES OVERALL
THREAD LENGTH	0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM NUT THREAD IN
THREAD LENGTH	0.335 INCHES MINIMUM AND 0.365 INCHES MAXIMUM STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5504 ASSN STD SINGLE MATERIAL RESPONSE
THREAD DIRECTION	RIGHT-HAND STUD THREAD
THREAD DIRECTION	RIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE	0.250 INCHES NUT THREAD IN
NOMINAL THREAD SIZE	0.312 INCHES STUD THREAD IN
LOCKING FEATURE	RING, LOCK KEYED
THREAD CLASS	3A NUT THREAD A

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 2

877BW-4SB-45Reference document

Same NSN cross-reference

Reference document — Secondary reference

4059T25P01Same 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 877BT-4SB-45?

877BT-4SB-45 is a STUD,LOCKED IN.

What parts can replace 877BT-4SB-45?

There are 2 known substitutes for 877BT-4SB-45: 877BW-4SB-45, 4059T25P01. Substitute compatibility should be verified for your specific system.

What is the NSN for 877BT-4SB-45?

877BT-4SB-45 is cataloged in the U.S. Government catalog under NSN 5307-01-043-9674. This indicates validated use in U.S. government and defense supply chains.

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