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31781 — LEVER,BRUSH

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

31781: LEVER,BRUSH.

The LEVER,BRUSH is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4427, rating_method: ELECTRICAL SINGLE COMPONENT ALL WINDING, thread_length: 1.218 INCHES MINIMUM NUT THREAD IN, inclosure_type: OPEN, hardness_rating: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM, inductance_type: FIXED. 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
NSN: 5307-00-353-2518
NIINs: 003532518, 004419322, 011020113, 014534505
FSC: 5307 — Studs
CAGE: 09386 — ALLIEDSIGNAL INC ALLIEDSIGNAL BRAKING SYSTEMS-WHEEL END PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL COMP 4427
rating_methodELECTRICAL SINGLE COMPONENT ALL WINDING
thread_length1.218 INCHES MINIMUM NUT THREAD IN
inclosure_typeOPEN
hardness_rating18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
inductance_typeFIXED
special_features0.094 IN. BY 45.0 DEG CHAMFER ON STUD END; 0.156 IN. BY 30.0 DEG CHAMFER ON STUD END IN
thread_directionRIGHT-HAND NUT THREAD
winding_quantity2 SINGLE COMPONENT
inductance_rating10.00 MILLIHENRIES NOMINAL SINGLE COMPONENT ALL WINDING
surface_treatmentCADMIUM AND ZINC OVERALL
nominal_thread_size0.750 INCHES STUD THREAD IN
NSN5307-00-353-2518
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 31781 · 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
•
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 LENGTH1.156 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH1.218 INCHES MINIMUM NUT THREAD IN
HARDNESS RATING18.0 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 CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.750 INCHES STUD THREAD IN
NOMINAL THREAD SIZE1.125 INCHES NUT THREAD IN
SUBSTITUTES & CROSS-REFERENCES 2
20X150Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
31781-2Reference 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?
31781 is a LEVER,BRUSH.
What parts can replace 31781?
There are 2 known substitutes for 31781: 20X150, 31781-2. Substitute compatibility should be verified for your specific system.
What is the NSN for 31781?
31781 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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