31781-2 — STUD,RECESSED AND STEPPED

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

31781-2: STUD,RECESSED AND STEPPED.

The STUD,RECESSED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4427, thread_length: 1.156 INCHES MINIMUM STUD THREAD IN, hardness_rating: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM, special_features: 0.094 IN. BY 45.0 DEG CHAMFER ON STUD END; 0.156 IN.

BY 30.0 DEG CHAMFER ON STUD END IN, thread_direction: RIGHT-HAND NUT THREAD, surface_treatment: CADMIUM AND ZINC OVERALL. This part is cataloged in the U.S. Government catalog under NSN 5307-00-353-2518, 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

31781-2

NSN: 5307-00-353-2518
FSC: 5307 — Studs
CAGE: 09386 — ALLIEDSIGNAL INC ALLIEDSIGNAL BRAKING SYSTEMS-WHEEL END PRODUCTS (USA)

SPECIFICATIONS

material	STEEL COMP 4427
thread_length	1.156 INCHES MINIMUM STUD THREAD IN
hardness_rating	18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
special_features	0.094 IN. BY 45.0 DEG CHAMFER ON STUD END; 0.156 IN. BY 30.0 DEG CHAMFER ON STUD END IN
thread_direction	RIGHT-HAND NUT THREAD
surface_treatment	CADMIUM AND ZINC OVERALL
nominal_thread_size	0.750 INCHES STUD THREAD IN
thread_pitch_diameters	+0.7044 TO 0.7084 INCHES STUD THREAD IN
thread_quantity_per_inch	16 STUD THREAD
thread_series_designator	UNS NUT THREAD
material_document_and_classification	SAE ASSN STD SINGLE MATERIAL RESPONSE
NSN	5307-00-353-2518

COMPONENT DIAGRAM

KEY FEATURES

•

THREAD LENGTH: 1.156 INCHES MINIMUM STUD THREAD IN

•

HARDNESS RATING: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM

•

THREAD PITCH DIAMETERS: +0.7044 TO 0.7084 INCHES STUD THREAD IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE

•

THREAD DIRECTION: RIGHT-HAND STUD THREAD

TECHNICAL CHARACTERISTICS

THREAD LENGTH	1.156 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH	1.218 INCHES MINIMUM NUT THREAD IN
HARDNESS RATING	18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
THREAD PITCH DIAMETERS	+0.7044 TO 0.7084 INCHES STUD THREAD IN
THREAD PITCH DIAMETERS	+1.0764 TO 1.0804 INCHES NUT THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATION	SAE ASSN STD SINGLE MATERIAL RESPONSE
THREAD DIRECTION	RIGHT-HAND STUD THREAD
THREAD DIRECTION	RIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE	0.750 INCHES STUD THREAD IN
NOMINAL THREAD SIZE	1.125 INCHES NUT THREAD IN

SUBSTITUTES & CROSS-REFERENCES 2

20X150Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

31781Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 31781-2?

31781-2 is a STUD,RECESSED AND STEPPED.

What parts can replace 31781-2?

There are 2 known substitutes for 31781-2: 20X150, 31781. Substitute compatibility should be verified for your specific system.

What is the NSN for 31781-2?

31781-2 is cataloged in the U.S. Government catalog under NSN 5307-00-353-2518. This indicates validated use in U.S. government and defense supply chains.

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31781-2 — STUD,RECESSED AND STEPPED

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