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25QD 21DP18 — ADJUSTER,SLACK,BRAKE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

25QD 21DP18: ADJUSTER,SLACK,BRAKE.

The ADJUSTER,SLACK,BRAKE is a the manufacturer industrial component. Key specifications include shape: TAPERED, hole_taper: 0.590 INCHES PER FOOT NOMINAL IN, spline_type: STRAIGHT SPLINE, major_diameter: 1.530 INCHES NOMINAL IN, adjustment_type: DOUBLE ARM, spline_quantity: 10. This part is cataloged in the U.S.

Government catalog under NSN 2530-01-149-1781, 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
25QD 21DP18
NSN: 2530-01-149-1781
FSC: 2530 — Vehicular Brake, Steering, Axle, Wheel, and Track Components
CAGE: 89619 — MACK TRUCKS, INC. DBA MACUNGIE OPERATIONS DIV LEHIGH VALLEY OPERATIONS (USA)
SPECIFICATIONS
shapeTAPERED
hole_taper0.590 INCHES PER FOOT NOMINAL IN
spline_typeSTRAIGHT SPLINE
major_diameter1.530 INCHES NOMINAL IN
adjustment_typeDOUBLE ARM
spline_quantity10
largest_diameter3.254 INCHES NOMINAL IN
smallest_diameter1.110 INCHES NOMINAL IN
connecting_arm_designSTRAIGHT
connecting_arm_thickness0.525 INCHES NOMINAL IN
connecting_arm_hole_bushingINCLUDED
connecting_arm_hole_quantity2
NSN2530-01-149-1781
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ADJUSTER,SLACK,BRAKE TITLE COMPONENT PN 25QD 21DP18 MFR ADJUSTER,SLACK,BRAKE
KEY FEATURES
•
CONNECTING ARM CENTER TO CENTER DISTANCE BETWEEN SPLINE HOLE AND CONNECTION HOLE: 4.220 INCHES NOMINAL IN
•
SPLINE TYPE: STRAIGHT SPLINE
•
CONNECTING ARM DESIGN: STRAIGHT
•
CONNECTING ARM HOLE QUANTITY: 2
•
CONNECTING ARM HOLE BUSHING: INCLUDED
•
SHAPE: TAPERED
•
SPLINE QUANTITY: 10
•
CONNECTING ARM THICKNESS: 0.525 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CONNECTING ARM CENTER TO CENTER DISTANCE BETWEEN SPLINE HOLE AND CONNECTION HOLE4.220 INCHES NOMINAL IN
SPLINE TYPESTRAIGHT SPLINE
CONNECTING ARM DESIGNSTRAIGHT
CONNECTING ARM HOLE QUANTITY2
CONNECTING ARM HOLE BUSHINGINCLUDED
SHAPETAPERED
SPLINE QUANTITY10
CONNECTING ARM THICKNESS0.525 INCHES NOMINAL IN
ADJUSTMENT TYPEDOUBLE ARM
MAJOR DIAMETER1.530 INCHES NOMINAL IN
OTHER ITEMS IN FSC 2530 — Vehicular Brake, Steering, Axle, Wheel, and Track Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2530-00-003-5229 2530-00-139-4058 2530-00-363-4183 2530-00-478-5792 2530-00-496-2927 2530-00-701-0656 2530-00-734-2546 2530-01-171-5122
SUBSTITUTES & CROSS-REFERENCES 1
K-500-CH-1877Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 25QD 21DP18?
25QD 21DP18 is a ADJUSTER,SLACK,BRAKE.
What parts can replace 25QD 21DP18?
There is 1 known substitute for 25QD 21DP18: K-500-CH-1877. Substitute compatibility should be verified for your specific system.
What is the NSN for 25QD 21DP18?
25QD 21DP18 is cataloged in the U.S. Government catalog under NSN 2530-01-149-1781. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.