877B-4MB-17 — STUD,RECESSED AND STEPPED

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

877B-4MB-17: STUD,RECESSED AND STEPPED.

The STUD,RECESSED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130, thread_class: 3A STUD THREAD A, thread_length: 0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM STUD THREAD IN, overall_length: 1.000 INCHES NOMINAL IN, style_designator: RECESSED AND STEPPED, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-940-0377, 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

877B-4MB-17

NSN: 5307-00-940-0377
FSC: 5307 — Studs
CAGE: 01556 — STANLEY ENGINEERED FASTENING LLC (USA)

SPECIFICATIONS

material	STEEL COMP 4130
thread_class	3A STUD THREAD A
thread_length	0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM STUD THREAD IN
overall_length	1.000 INCHES NOMINAL IN
style_designator	RECESSED AND STEPPED
thread_direction	RIGHT-HAND NUT THREAD
surface_treatment	CADMIUM OVERALL
nominal_thread_size	0.250 INCHES NUT THREAD IN
plain_shank_diameter	0.2435 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
thread_quantity_per_inch	28 NUT THREAD
thread_series_designator	UNIFIED NATIONAL COARSE (UNC) STUD THREAD
length_of_recessed_portion_of_shank	0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
NSN	5307-00-940-0377

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN

•

STYLE DESIGNATOR: RECESSED AND STEPPED

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE

•

DIAMETER OF RECESSED PORTION OF SHANK: 0.239 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN

•

THREAD DIRECTION: RIGHT-HAND STUD THREAD

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD IN
THREAD LENGTH	0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM STUD THREAD IN
STYLE DESIGNATOR	RECESSED AND STEPPED
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH	1.000 INCHES NOMINAL IN
DIAMETER OF RECESSED PORTION OF SHANK	0.239 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
THREAD DIRECTION	RIGHT-HAND STUD THREAD
THREAD DIRECTION	RIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE	0.250 INCHES NUT THREAD IN

SUBSTITUTES & CROSS-REFERENCES 1

S245-3-610ASPLReference 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 877B-4MB-17?

877B-4MB-17 is a STUD,RECESSED AND STEPPED.

What parts can replace 877B-4MB-17?

There is 1 known substitute for 877B-4MB-17: S245-3-610ASPL. Substitute compatibility should be verified for your specific system.

What is the NSN for 877B-4MB-17?

877B-4MB-17 is cataloged in the U.S. Government catalog under NSN 5307-00-940-0377. This indicates validated use in U.S. government and defense supply chains.

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877B-4MB-17 — STUD,RECESSED AND STEPPED

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